Audible spectrum doesn't actually stops at 20hz, but the accoustic pressure needed to hear frequencies below that skyrockets. You can hear down to 3Hz with enough power, as demonstrated by rotary subwoofers.
A bass drum won't provide ultra low as a speaker enclosure. For that you need a dedicated box and ports calculated in length and volume to tune the enclosure low so that the speaker doesn't just flap back and forth and bottom out. I do think a speaker in a bass drum would be fun to experiment with for different kick drum sounds. If you connected a resistor across the speaker terminals, you could experiment with different cone damping from a wire (high damping) to open circuit (low damping)
Lol. There was no actual sound recorded of the drum! He overlayed another clean bass audio over the actual sound of the drum. I bet it sounded like shit. The frequency he played was not even subsonic! It was more like a 40hz tone. On top of that, the video he chose to test was too high in frequency. 🤣 This whole video is a lie and rubbish!
First, it's great that you are playing around but as someone who has designed and built many subwoofers, so many thoughts came to mind, and I hope some of these can be helpful. The enclosure of that drum is way, way, way too small for a speaker that size. You do not want the back of the speaker to be loose and flabby like the drum back. You want all walls of the speaker to be as rigid as reasonably possible. This is so that the speaker enclosure does not make sounds on its own, coloring the sound. If you wanted it to contribute constructively to the output of the speaker, you need it to be much heavier so that it will resonate at a much lower frequency (passive radiator). A passive radiator also should be larger than the speaker itself and/or capable of more excursion. Another issue is the giant hole in the back. The tuning frequency is so high that it is useless for any purpose of a subwoofer. The reason you did not hear anything was because your system was not capable of producing that frequency. Honestly, if you really wanted that subwoofer to reproduce infrasonics, you need to put it in at least a 15 cubic foot enclosure and tune the port or passive radiator to something like 15Hz. But that subwoofer that you have is not really a good model to use for this purpose. What you need is a subwoofer that is capable of moving far more air, something like a Dayton Ultimax. Also, you don't need earplugs for what you had but it's good to be safety-minded.
Try it before you knock it. I've got a phd but you don't hear me presenting on the back of my 20+ years of innovation... Just sharing (honestly) the real experiment and experience.
@@morganrau I'm not "knocking" it. I'm explaining to you what is going on. It's great that you shared your experience. You should be humble enough to be open to suggestions and feedback. This way you can learn.
@@morganrau You may have a PHD but probably not to do with acoustics or anything related to whats going on (not knocking but just saying). So you do not want the enclosure itself to be imparting its own sound. The driver should be the sound source only. As Content Updating mentioned, you want a strong rigid enclosure that will not flex. Also without doing measurements of the driver and just placing it in an air space, you'd have no idea what is actually happening. Best thing would be to buy something like the Dayton WT3 woofer tester, test the woofer and model the enclosure for the driver to get the desired output.
@@svtcontour Dude really, character assassination? How about we stick to the facts.. I experimented and you have not. An experiment conducted @ Concordia University media labs!? Anyways. Please don't knock it till you try it.. You know.. The scientific method (repeatability)!
i think the round basedrum makes the walls of it pretty sturdy , i do wonder if the speaker becomes more efficient if you where to mount a sollid wall on the back of it instead of the drumskin
So basically since you threw the concept of proper enclosure size and air volume out of the window, as well as sealing the back wave of the woofer from the front, the drum skin is acdting as a passive radiator in a way?... thx
Sorry but it's not simple and it's not passive. It's an active radiation because of the complex harmonic that is accomplished by the shape of the chamber. Look up resonance and how it can generate energy (not reflection). That is why you feel the sub audible sound in your body when you stand in certain places in a room where it is placed (based on wave lengths/distance from setup). M:
No basic about it I'm afraid. You need the vibrations, reverberations, and undulations to reach the level of the body fluid system to experience the effects.
@@morganrau It is most certainly a passive radiator because it has no direct motor force acting upon it. But in this case, it doesn't have enough mass to resonate at a frequency low enough to be beneficial. In fact, the sound emanating from the skin is destructively canceling the bass from the speaker.
@@thingsdemystified harmonics are not achieved via radiation (passive or not) as much as reflective-amplification and in this case the chamber acts like a 'sound laser' (google it), but for much longer waves. You can't even experience the "body irritating feeling" for lack of a better description, that result from the canon I've made, unless you stand at very strategic locations in the a lab (so as to encounter the harmonic resonance moment in the space..). And in your body.
It will be interesting as well for the sub-bass to use the kicker directly into the speaker and to amplify the sound. NS10 speakers are used to capturing the sub-bass like a microphone. This will be insanely low?
Just SubBass doesn't do hearing damage to my knowledge even with SPL levels in 150db+ range. It's mostly just pressure, but if the pressure bothers ear drums I suppose ear plugs help a little.
Sorry but it's not simple and it's not passive. It's an active radiation because of the complex harmonic that is accomplished by the shape of the chamber. Look up resonance and how it is can generate energy (not reflection). That is why you feel the sub audible sound in your body when you stand in certain places in a room where it is placed (based on wave lengths/distance from setup). M:
All the car audio hobbiests you keep talking down to can see what a deliberately-uninformed moron you insist on being. The second-hand embarrassment is killing me fam.
Dude, I'm pretty sure that the heads on that kick drum were creating destructive interference with the subwoofer. Typically, people looking for HUGE bass spring for either a ported box or a chambered box. Also, I doubt that wire was 8 gauge. It looked like 10 or 12 gauge to me. I also wouldn't trust Pyle products to deliver any sort real performance. Also, low frequencies tend to be very penetrating. I don't think your hearing protection was doing a whole lot for you.
Lol. There was no actual sound recorded of the drum! He overlayed another clean bass audio over the actual sound of the drum. I bet it sounded like shit. The frequency he played was not even subsonic! It was more like a 40hz tone. On top of that, the video he chose to test was too high in frequency. 🤣 This whole video is a lie and rubbish!
Pardon my ignorance but are earplugs needed at this low frequencies and SPL? also are they effective? I remember reading some time ago that the damage threshold for hearing goes significantly up with lower frequencies but i might be remembering wrong or might be misinformation.
its a passive radiator box when you leave the skin on the back. adding weight to the skin and loosening tuning pegs will make the bass play lower frequencies
Lol. There was no actual sound recorded of the drum! He overlayed another clean bass audio over the actual sound of the drum. I bet it sounded like shit. The frequency he played was not even subsonic! It was more like a 40hz tone. On top of that, the fiat video he chose to test was too high in frequency. 🤣 This whole video is a lie and rubbish!
It would be interesting to see how it performs as a bass drum "subkick". Wire I mic cord to it, plug into a mixer board, place the bassdrum with the speaker on it directly in front of a regular bassdrum with the face of the speaker facing the front head
Morgan Rauscher You'll want to also mic the kick drum from the inside (not the one with the speaker in it) and combine the two signals (separate channels on your mixer board). I made a subkick out of a 10" tom & a 6.5" Kicker sub. It sounds great when combining with a regular miked up kick drum
Morgan - what you have made is a dipole bass system. The drum diaphragms are not required. If you take them off the system should perform better - less colouration because the drum skins have a resonance which will give a peak at one frequency where as you should be working on the resonant frequency of the speaker itself. Using the drum itself is a good idea. You will find the bass being dipole will be more directional. Try to get a frequency response test done with the skins and without the skins and publish it.
LOL at the hearing protection tho , man u dont need that. 150+db maybe. , at 20hz i bet ur not even breaking 120db we have cars in car audio that do upwards of 150db at 20hz and that dont bother me one bit , high pitch at 150db is another story
Lol. There was no actual sound recorded of the drum! He overlayed another clean bass audio over the actual sound of the drum. I bet it sounded like shit. The frequency he played was not even subsonic! It was more like a 40hz tone. On top of that, the video he chose to test was too high in frequency. 🤣 This whole video is a lie and rubbish!
You said you hear "nothing" at the low frequency yet I hear a pulsing sound, so which is it, nothing or a pulsing sound? A square, triangle, ramp or pulse wave with a fundamental in the infrasound range still has a great deal of harmonic energy in the audio range which we hear as a tempo which has the same frequency as the fundamental, so we detect frequency in the infrasound range indirectly using the tempos formed by the beating of the higher harmonics of a wave, the tempo we hear matches the fundamental frequency that we don't hear. This also occurs in the audio range, if we remove the lower harmonics of a wave including the fundamental the brain imagines them in maintaining its sense of pitch at the fundamental, inference is part of sensory experience. We only really see 3 colors, the brain infers the rest by triangulation and, sometimes inaccurately, yet no one would claim that "we only see three colors" simply because inference is part of the sensory process, it always is and for all the senses! We hear into the infrasound range by inference, but it is hearing never the less, a pulse or other wave with many upper partials can be scanned across 20 octaves and we hear its frequency continuously, in the upper 10 octaves we har the wave as pitch and in the lower 10 octaves we hear the wave as tempo. At about 1 beat every 10 seconds or so our sense of tempo begins to disappear. Even a sine wave periodically rattles bones and external objects, which we can hear as a tempo
Lol. There was no actual sound recorded of the drum! He overlayed another clean bass audio over the actual sound of the drum. I bet it sounded like shit. The frequency he played was not even subsonic! It was more like a 40hz tone. On top of that, the video he chose to test was too high in frequency. 🤣 This whole video is a lie and rubbish!
What you hear at 15hz is your speaker flapping and distorting, you hear the paper cone being warped and stressed, a bit of air, you hear all kinds of “noises” at 15hz, but I promise you what you DONT hear is a distinctive 15hz sine wave, because you are human and your ears weren’t designed to hear below 20hz.
StopaskingformynameTH-cam people like to make up unfalsifiable "discoveries" like how "you can't read or see colors in dreams" there was time when scientists claimed that your brain would seize if you traveled faster than 20mph. This was in the early 1900s
Lowest sound humans can hear is somewhere between 12 and 20 Hz. 12Hz can be percieved under lab conditions. Lowest note on 32ft organ stop is 16.35Hz C0. B-1 is around 15Hz, an octave below 5 string bass. I can hear 16Hz, but I cannot hear anything above 15kHz. Sound is divided into not many areas. Infrasound is anything below 16Hz, it can be percieved by humans, but is not hearable, elephants and whales use it for comunication as it travels verry far distance easily. Earthquakes and fundamental tones of heavy engines are found there. Next one is sub bass and lowest sounds humans can hear as musical tones are there. Lowest tones produced by musical instruments are there, this is area that spans from 20Hz to 80Hz. Bass spans from 80 to 200Hz. Low mids from 200 to 800, high mids from 800 to 4k, presence range goes from 2k to 6k, treble from 6k to 12k, and air is everything above 13k going to 22k, above 20k or 22k is ultrasound.
For generate infrasonic sound need 2 sub speaker in one case 1/4 wave resonator. One channel of amplifer for first and one channel for second dynamic and need special soft for make binaural sound. I have Mac Audio IceFire 225 and make experiment with my guitar and with Ableton and programm synthesizer - emulation analog KORG synthesizers, I make resonance and I hear very amazing effects. Sorry for my english - I am from Siberia.
For some reason after sealing both of my subwoofer boxes im getting frequency responses down to 8hz and getting massive door flex at 15hz wonder why sealing my ported boxes improve the efficiency with the low bass and the subsonics
the reason why is below the port tuning the sub becomes unloaded as any sound pressure that would be created by the sub is relieved through the port, since the box is sealed the sound pressure isn't being released, so it can produce infrasonics a bit better, i'm guessing it's quieter when sealed at higher frequencies though. Ported boxes have a sharper roll-off than sealed, though are more efficient, and can allow better low extension.
xINFINITExgamer that would be your Port tuning you must be tuned to a high frequency the bigger the enclosure the lower you go most of the time and the length and the size of the port matter as well and changes the frequency
Sorry, but you know nothing about speakers, how they work, frequency responses and requirements, power requirements for the speakers, how bass porting and enclosure design works to funnel the bass and 'compress' the air more to create more bass... (oh, and yes, it's bass, not base.... that's something else entirely :) )
Hate to tell you but I agree with Colin. According to WinISD this driver's optimum ported enclosure is a 12.807 cubic foot box tuned to 27.51hz. Even then this driver's -3dB point is 29.68 hz.....nowhere near what is considered infrasonic. That is a 14x22 kickdrum it looks like...maybe 3 cubic feet without driver displacement. Assuming that is a 6" port maybe 4" long that "box" is tuned to about 55hz resulting in a 5db peak around 87 hz and a -3dB cutoff at 57hz. Even adding the movement of the drumhead....getting infrasonic at any reasonable sound level is doubtful. Yes...I have been building Sub enclosures for many years.....
Morgan Rauscher easy build the box to the correct specs even though it will be down probably 9-12db or more at 20hz I bet it far exceeded the output of what you made.
Right, another reply hmm. Going with the flow is wonderful, however, this could have been so much more than what it is. i honestly suggest you try again but this time follow some hints from some fellow users and show your work, its not hard to measure the area of a cylinder and work out resonance nor is it hard to plot a response graph.
hmm, no, im more interested to see you improve what is :) myself do a better job ?, if i put my mind to it possibly, however its only foreseeable when i'm paid for my time to play around with winisd and using a term lab and we all know that is nothing more than a dream, well at least in my current situation.
here's some positive feedback for you, don't delete your old comments. So because you build things without doing any homework and get a result that 95% of people call you out on, makes you better ?... Sorry but it does not. It's homework that enables me to make things that in the end put trophy's on my shelf, while your still getting called out, can't show your work or any proof of concept and end up getting no where. Have a wonderful day. oh and one more piece of positive feedback: Hopefully you find something better to do than wait another two years, delete your comments and respond to them again.
Honestly this a very interesting video. I would have like to have seen better products used, as they would have most likely greatly enhanced what you were attempting. Also i must ask why the hearing protection?
The problem is, even if you loosen the head all the way, it wouldn't even resonate anywhere near low enough to be of any use, and you have to plug the hole too.
please share links or more info about these magical subwoofers that do 6" peak to peak at 15hz or play 1-20hz like a boss! No such thing as a subwoofer doing such things, perhaps a rotatory driver in a 25cuft enclosure.
The designer could achieve more success using the longest pipes from the body of the organ from the local church. Or it is better to use Timpani from a large symphonic orchestra, they are closer to his beloved infrasonic. But it was necessary to start with acoustics textbooks.
30 hz is not that low a normal Bluetooth speaker can reproduce 30, and hearing protection for 70hz and under is not really needed. People sit in 165db vehicles at 30hz and there hearing is not affected.
The build video turned out really great. Interesting idea to build an infrasonic sub! I like the design because it's very unique. Unfortunately what you're trying to do here is a bit like building a car that's going more than 250mph from e.g. a Honda Civic by putting a truck engine in it. An infrasonic sub is a good topic for my DIY Subwoofer Build series. I'll maybe film a video about how and if that works in 2018 when I continue with the sub I'm currently building: th-cam.com/play/PL4lJ1ej0uWlQC7HWP82uNKYVokgEx39qQ.html. Here are some problems which you might have had: a bass drum is an instrument. Every part of an Instrument produces sounds. A speaker should reproduce sounds instead of creating them. A driver produces no sound below its resonant frequency. By putting it into an enclosure the resonant frequency even rises. (There is the concept of URPS, Under Resonance Principle Subwoofers, but that needs a very powerful amplifier, 1000+ watts.) The bigger the cone area the bigger the enclosure volume needed for lower frequencies. The box needs to be at least as big as the Compliance Equivalent Volume (Vas) of the driver. (If it's the Pyle PDW21250 then 25 cubic feet.) If you put the drum heads back on you have a band pass enclosure which takes some effort to calculate correctly to get a suitable result. Professional drivers are designed for loud volumes not for low bass. Possible solution: open baffle with powerful amplifier and an active subwoofer crossover. An open baffle lowers the resonant frequency but produces a loud peak in the midbass area. Source of all my knowledge: German DIY loudspeaker magazine Hobby HiFi
Lol. There was no actual sound recorded of the drum! He overlayed another clean bass audio over the actual sound of the drum. I bet it sounded like shit. The frequency he played was not even subsonic! It was more like a 40hz tone. On top of that, the video he chose to test was too high in frequency. 🤣 This whole video is a lie and rubbish!
@@JoshuasRecordings Unfortunately no not repeatable via headphones because the diameter of the woofer speaker needs to be very large to get the natural reverberations, as opposed to simulating the reverberations via some sound en/decoder and tricks of the mind ;)
@@morganrau The majority of headphones play down to around 15 Hz. This is because the drivers are so close to your ears. All you had to do is record your "invention" with any halfway decent microphone and it would come through just fine on almost all headphones.
Check out the bass drums Jason Tice at hempopotamusloudspeakers.com installed in his double bass drum set.Around 5-6 years ago, they installed 2 BEYMA 21" BEYMA speakers in the fronts of the bass drums.used for triggers AND for amplified sound. PA in a drum set.
You should calculate how much volume that subwoofer requires, then make a proper enclosure for that volume. That's how you can reach lower frequencies ☺️
You can use a subwoofer with the magnet spiders and coils removed just using the basket and cone which is the same thing Klipsch does with their reference series house subwoofers. Another cool idea would be using a whole intact subwoofer as a passive radiator but use the terminal leads as a device to recapture some of the energy and feed it back to the battery bank or capacitors. I wasn't meaning to come off as a dick though and sorry if it sounded as such.
There's also another project that some sound engineers use to mic kick drum which uses a 6 or 8 inch component or woofer as a microphone for the kick drum mounting it closely to the port.
It's BASS CANON not base, get it right. I played louder sounds when I was 14 the birds loved it, my cat slept next to my 15" 600 rms sub for hours, both the neighbors houses rattled, glassware would fall and break in the house, so don't dribble shit like you know anything about volume, come talk to me if you want to know what a real stereo is
You would get more Bass putting it into the right size cabinet, this isnt infrasound. The only true infrasound device at the moment is the rotary subwoofer.
Morgan Rauscher: Yes incredibly difficult; the trick is to push large volumes of air at high accelerations, apparently a 30cm rotary sub can shake houses a couple of miles away.
@@suzesiviter6083 SVS, JTR, Rhythmik and others produce subwoofers that produce useful levels of infrasound :) My system can produce 16Hz at 121 dB measured ground plane 2meter RMS.
@@thingsdemystified 16Hz at 121db sounds very optimistic, what sound level meter(SLM) did you use? I know the cheaper SLM's are grossly inaccurate at low frequencies. I measured around that at 20Hz for a 120L subwoofer, not one of those compact designs that fudge the figures on marketing gumpf.
ultrasound and infrasound travels through everything but a vacuum. the ear protectors do not help at all.... see richard king facebook and you will learn how i know this...good show
@@morganrauyou literally had a guy calculate the right enclosure for you to build, but here you ask for advice? Why? You won't take a nano second to realize others know more than you when you're 5 minutes into a completely new field... Christ this is so bad. You, as a body of work, are one of the most insufferable people I've ever come across online. Fuck me sideways the baseless arrogance when talking to the peasants is hysterical. The emperor is naked, except everyone is screaming at him to inform him, and he just keeps replying "do the test yourself. Hater. Any advice? How do you like my new robe?"
Crappy ass SVC 21" Pyle trash. Sundown, Crecendo audio, DC audio, PSI, SMD, Rockford fosgate, Alpine, Kenwood. anything above would kill this in a matter of seconds. this box is illogical because your only running with a max of something around 3.0 cu. ft^ MAX and your port is so wide open and theres absolutely 0 lenght on it it's just a leaky hole. you also have your leads going through 2 holes in the box which can cause distortion and can fuck with the tuning of the box making distortion or other things like box rise or resisitance changes. and as for hearing protection? I'm sorry but even if you had this in the proper box it needs you'd never ever be able to hit a high enough decibel to actaully damage your ear drums 85 DB at prolonged usages could cause somewhat hearing loss and I highly highly DOUBT this sub ever got near 85DB in that drum.
Audible spectrum doesn't actually stops at 20hz, but the accoustic pressure needed to hear frequencies below that skyrockets. You can hear down to 3Hz with enough power, as demonstrated by rotary subwoofers.
A bass drum won't provide ultra low as a speaker enclosure. For that you need a dedicated box and ports calculated in length and volume to tune the enclosure low so that the speaker doesn't just flap back and forth and bottom out. I do think a speaker in a bass drum would be fun to experiment with for different kick drum sounds. If you connected a resistor across the speaker terminals, you could experiment with different cone damping from a wire (high damping) to open circuit (low damping)
Lol. There was no actual sound recorded of the drum! He overlayed another clean bass audio over the actual sound of the drum. I bet it sounded like shit. The frequency he played was not even subsonic! It was more like a 40hz tone. On top of that, the video he chose to test was too high in frequency. 🤣
This whole video is a lie and rubbish!
First, it's great that you are playing around but as someone who has designed and built many subwoofers, so many thoughts came to mind, and I hope some of these can be helpful. The enclosure of that drum is way, way, way too small for a speaker that size. You do not want the back of the speaker to be loose and flabby like the drum back. You want all walls of the speaker to be as rigid as reasonably possible. This is so that the speaker enclosure does not make sounds on its own, coloring the sound. If you wanted it to contribute constructively to the output of the speaker, you need it to be much heavier so that it will resonate at a much lower frequency (passive radiator). A passive radiator also should be larger than the speaker itself and/or capable of more excursion. Another issue is the giant hole in the back. The tuning frequency is so high that it is useless for any purpose of a subwoofer. The reason you did not hear anything was because your system was not capable of producing that frequency. Honestly, if you really wanted that subwoofer to reproduce infrasonics, you need to put it in at least a 15 cubic foot enclosure and tune the port or passive radiator to something like 15Hz. But that subwoofer that you have is not really a good model to use for this purpose. What you need is a subwoofer that is capable of moving far more air, something like a Dayton Ultimax. Also, you don't need earplugs for what you had but it's good to be safety-minded.
Try it before you knock it. I've got a phd but you don't hear me presenting on the back of my 20+ years of innovation... Just sharing (honestly) the real experiment and experience.
@@morganrau I'm not "knocking" it. I'm explaining to you what is going on. It's great that you shared your experience. You should be humble enough to be open to suggestions and feedback. This way you can learn.
@@morganrau You may have a PHD but probably not to do with acoustics or anything related to whats going on (not knocking but just saying). So you do not want the enclosure itself to be imparting its own sound. The driver should be the sound source only. As Content Updating mentioned, you want a strong rigid enclosure that will not flex. Also without doing measurements of the driver and just placing it in an air space, you'd have no idea what is actually happening. Best thing would be to buy something like the Dayton WT3 woofer tester, test the woofer and model the enclosure for the driver to get the desired output.
@@svtcontour Dude really, character assassination? How about we stick to the facts.. I experimented and you have not. An experiment conducted @ Concordia University media labs!? Anyways. Please don't knock it till you try it.. You know.. The scientific method (repeatability)!
My bad... It's just all these comments come from people who have not attempted to repeat my results before starting a dialogue.
I have been planning to do this for DECADES! Thanks for doing it FOR me! Now I can see how well it would work!
i think the round basedrum makes the walls of it pretty sturdy , i do wonder if the speaker becomes more efficient if you where to mount a sollid wall on the back of it instead of the drumskin
So basically since you threw the concept of proper enclosure size and air volume out of the window, as well as sealing the back wave of the woofer from the front, the drum skin is acdting as a passive radiator in a way?... thx
Sorry but it's not simple and it's not passive. It's an active radiation because of the complex harmonic that is accomplished by the shape of the chamber. Look up resonance and how it can generate energy (not reflection). That is why you feel the sub audible sound in your body when you stand in certain places in a room where it is placed (based on wave lengths/distance from setup). M:
No basic about it I'm afraid. You need the vibrations, reverberations, and undulations to reach the level of the body fluid system to experience the effects.
IE A very large emitter (speaker) ... not some clock radio speakers or any set of headphones with some digital interpretation of anything ;)
@@morganrau It is most certainly a passive radiator because it has no direct motor force acting upon it. But in this case, it doesn't have enough mass to resonate at a frequency low enough to be beneficial. In fact, the sound emanating from the skin is destructively canceling the bass from the speaker.
@@thingsdemystified harmonics are not achieved via radiation (passive or not) as much as reflective-amplification and in this case the chamber acts like a 'sound laser' (google it), but for much longer waves. You can't even experience the "body irritating feeling" for lack of a better description, that result from the canon I've made, unless you stand at very strategic locations in the a lab (so as to encounter the harmonic resonance moment in the space..). And in your body.
It will be interesting as well for the sub-bass to use the kicker directly into the speaker and to amplify the sound. NS10 speakers are used to capturing the sub-bass like a microphone. This will be insanely low?
it'll work
Tha has been closing my mind , thank you for the video, and why not try it from the out side with a side port??
Just SubBass doesn't do hearing damage to my knowledge even with SPL levels in 150db+ range. It's mostly just pressure, but if the pressure bothers ear drums I suppose ear plugs help a little.
And when the speakers pop in lab?
Right
It's basiclly a passive radiator set up
Sorry but it's not simple and it's not passive. It's an active radiation because of the complex harmonic that is accomplished by the shape of the chamber. Look up resonance and how it is can generate energy (not reflection). That is why you feel the sub audible sound in your body when you stand in certain places in a room where it is placed (based on wave lengths/distance from setup). M:
All the car audio hobbiests you keep talking down to can see what a deliberately-uninformed moron you insist on being. The second-hand embarrassment is killing me fam.
Dude, I'm pretty sure that the heads on that kick drum were creating destructive interference with the subwoofer. Typically, people looking for HUGE bass spring for either a ported box or a chambered box. Also, I doubt that wire was 8 gauge. It looked like 10 or 12 gauge to me. I also wouldn't trust Pyle products to deliver any sort real performance. Also, low frequencies tend to be very penetrating. I don't think your hearing protection was doing a whole lot for you.
Lol. There was no actual sound recorded of the drum! He overlayed another clean bass audio over the actual sound of the drum. I bet it sounded like shit. The frequency he played was not even subsonic! It was more like a 40hz tone. On top of that, the video he chose to test was too high in frequency. 🤣
This whole video is a lie and rubbish!
Pardon my ignorance but are earplugs needed at this low frequencies and SPL? also are they effective? I remember reading some time ago that the damage threshold for hearing goes significantly up with lower frequencies but i might be remembering wrong or might be misinformation.
its more depends on the amp because of filters that keep the sub from playing below a certain point
yup sum wont even let u hit it or get near hittin it
Most amps with a sub sonic filter are set at 15-20hz. Most higher end amps let you adjust or turn it off though.
Awesome invention, what is the range of frequencies this thing can bust out?
Have you tried a bigger bass drum like a concert bass drum or bigger?
Really interesting harmonics during the time lapse parts of your video.
Just curious to know what size drum you used in this video?
its a passive radiator box when you leave the skin on the back. adding weight to the skin and loosening tuning pegs will make the bass play lower frequencies
Lol. There was no actual sound recorded of the drum! He overlayed another clean bass audio over the actual sound of the drum. I bet it sounded like shit. The frequency he played was not even subsonic! It was more like a 40hz tone. On top of that, the fiat video he chose to test was too high in frequency. 🤣
This whole video is a lie and rubbish!
It would be interesting to see how it performs as a bass drum "subkick". Wire I mic cord to it, plug into a mixer board, place the bassdrum with the speaker on it directly in front of a regular bassdrum with the face of the speaker facing the front head
Morgan Rauscher
You'll want to also mic the kick drum from the inside (not the one with the speaker in it) and combine the two signals (separate channels on your mixer board). I made a subkick out of a 10" tom & a 6.5" Kicker sub. It sounds great when combining with a regular miked up kick drum
Morgan - what you have made is a dipole bass system. The drum diaphragms are not required. If you take them off the system should perform better - less colouration because the drum skins have a resonance which will give a peak at one frequency where as you should be working on the resonant frequency of the speaker itself. Using the drum itself is a good idea. You will find the bass being dipole will be more directional. Try to get a frequency response test done with the skins and without the skins and publish it.
Great! Carry on!
Not worth explaining. This whole video was rubbish. The drum sound when tested was overlapping with audio he put on the video to pretend.
I'm surprised how well it fits in the drum...
The sub audible would be an artifact(a type of distortion) since you're just inducing the head's resonance using a woofer.
Sorry that simple worked ;)
You're the simple here, and it ain't working
LOL at the hearing protection tho , man u dont need that. 150+db maybe. , at 20hz i bet ur not even breaking 120db we have cars in car audio that do upwards of 150db at 20hz and that dont bother me one bit , high pitch at 150db is another story
e citt
Morgan Rauscher Been doing car audio for years. Still waiting to find out the hard way.
Morgan Rauscher First for everything right?
TheNightCore Nobody is telling anybody off.
TheNightCore .......HAAAAY, that's racist!
Wind farms make infrasound too. Notice he said "It might kill my birds". These dangerous low frequencies can travel many miles.
I was more thinking heart attacks but interesting
So what was the results?
Ok, this is blattering nonsense.
Where's a frequency chart or something that can quantize the "results"
what he did was put a 21" in a small enclosure with a restricted passive radiator.
It probably has a -3dB point of 100Hz or higher.
Lol. There was no actual sound recorded of the drum! He overlayed another clean bass audio over the actual sound of the drum. I bet it sounded like shit. The frequency he played was not even subsonic! It was more like a 40hz tone. On top of that, the video he chose to test was too high in frequency. 🤣
This whole video is a lie and rubbish!
So how loud does that speaker go to? Is it a competitor to LRAD?
*7:25* - Oh yeah, I am definitely hearing that with my headphones. No doubt about it.
You said you hear "nothing" at the low frequency yet I hear a pulsing sound, so which is it, nothing or a pulsing sound? A square, triangle, ramp or pulse wave with a fundamental in the infrasound range still has a great deal of harmonic energy in the audio range which we hear as a tempo which has the same frequency as the fundamental, so we detect frequency in the infrasound range indirectly using the tempos formed by the beating of the higher harmonics of a wave, the tempo we hear matches the fundamental frequency that we don't hear.
This also occurs in the audio range, if we remove the lower harmonics of a wave including the fundamental the brain imagines them in maintaining its sense of pitch at the fundamental, inference is part of sensory experience. We only really see 3 colors, the brain infers the rest by triangulation and, sometimes inaccurately, yet no one would claim that "we only see three colors" simply because inference is part of the sensory process, it always is and for all the senses!
We hear into the infrasound range by inference, but it is hearing never the less, a pulse or other wave with many upper partials can be scanned across 20 octaves and we hear its frequency continuously, in the upper 10 octaves we har the wave as pitch and in the lower 10 octaves we hear the wave as tempo. At about 1 beat every 10 seconds or so our sense of tempo begins to disappear.
Even a sine wave periodically rattles bones and external objects, which we can hear as a tempo
Obviously the real environment I had can not be simulated over TH-cam... Silly silly
Lol. There was no actual sound recorded of the drum! He overlayed another clean bass audio over the actual sound of the drum. I bet it sounded like shit. The frequency he played was not even subsonic! It was more like a 40hz tone. On top of that, the video he chose to test was too high in frequency. 🤣
This whole video is a lie and rubbish!
Hey Morgan what was the name of that drum and bass song at the end its so good! Awesome idea!
Need a rotorary sub maybe
Sub audible is somewhat false.
I can clearly hear 15hz aswell as 18500hz.
Some people probably can't tho, too much loud music i guess.
What you hear at 15hz is your speaker flapping and distorting, you hear the paper cone being warped and stressed, a bit of air, you hear all kinds of “noises” at 15hz, but I promise you what you DONT hear is a distinctive 15hz sine wave, because you are human and your ears weren’t designed to hear below 20hz.
StopaskingformynameTH-cam people like to make up unfalsifiable "discoveries" like how "you can't read or see colors in dreams" there was time when scientists claimed that your brain would seize if you traveled faster than 20mph. This was in the early 1900s
Lowest sound humans can hear is somewhere between 12 and 20 Hz. 12Hz can be percieved under lab conditions. Lowest note on 32ft organ stop is 16.35Hz C0. B-1 is around 15Hz, an octave below 5 string bass. I can hear 16Hz, but I cannot hear anything above 15kHz. Sound is divided into not many areas. Infrasound is anything below 16Hz, it can be percieved by humans, but is not hearable, elephants and whales use it for comunication as it travels verry far distance easily. Earthquakes and fundamental tones of heavy engines are found there. Next one is sub bass and lowest sounds humans can hear as musical tones are there. Lowest tones produced by musical instruments are there, this is area that spans from 20Hz to 80Hz. Bass spans from 80 to 200Hz. Low mids from 200 to 800, high mids from 800 to 4k, presence range goes from 2k to 6k, treble from 6k to 12k, and air is everything above 13k going to 22k, above 20k or 22k is ultrasound.
Yes you hear things for the video. You have to replicate the experiment like some of the others up here and then talk
What's the power handling capacity of the woofer (Watts/Ohms) and the amp?
For generate infrasonic sound need 2 sub speaker in one case 1/4 wave resonator. One channel of amplifer for first and one channel for second dynamic and need special soft for make binaural sound. I have Mac Audio IceFire 225 and make experiment with my guitar and with Ableton and programm synthesizer - emulation analog KORG synthesizers, I make resonance and I hear very amazing effects. Sorry for my english - I am from Siberia.
For some reason after sealing both of my subwoofer boxes im getting frequency responses down to 8hz and getting massive door flex at 15hz wonder why sealing my ported boxes improve the efficiency with the low bass and the subsonics
the reason why is below the port tuning the sub becomes unloaded as any sound pressure that would be created by the sub is relieved through the port, since the box is sealed the sound pressure isn't being released, so it can produce infrasonics a bit better, i'm guessing it's quieter when sealed at higher frequencies though. Ported boxes have a sharper roll-off than sealed, though are more efficient, and can allow better low extension.
xINFINITExgamer that would be your Port tuning you must be tuned to a high frequency the bigger the enclosure the lower you go most of the time and the length and the size of the port matter as well and changes the frequency
a sealed box drops 12 db per octave. cabin gain is plus 12db per octave below room tuning .
it reminds me of what we hear when we're inside a closed car.
I dont think ultra low sub frequencies can damage your hearing at that level, so really no need for hearing aids
Probably but if the speakers pped they would give the birds a heart attack... Not good
Sorry, but you know nothing about speakers, how they work, frequency responses and requirements, power requirements for the speakers, how bass porting and enclosure design works to funnel the bass and 'compress' the air more to create more bass...
(oh, and yes, it's bass, not base.... that's something else entirely :) )
Hate to tell you but I agree with Colin. According to WinISD this driver's optimum ported enclosure is a 12.807 cubic foot box tuned to 27.51hz. Even then this driver's -3dB point is 29.68 hz.....nowhere near what is considered infrasonic. That is a 14x22 kickdrum it looks like...maybe 3 cubic feet without driver displacement. Assuming that is a 6" port maybe 4" long that "box" is tuned to about 55hz resulting in a 5db peak around 87 hz and a -3dB cutoff at 57hz. Even adding the movement of the drumhead....getting infrasonic at any reasonable sound level is doubtful. Yes...I have been building Sub enclosures for many years.....
Morgan Rauscher .........YEAH!..........what you said. 😠
Colin Hadley I think you know more than morgan
Morgan Rauscher easy build the box to the correct specs even though it will be down probably 9-12db or more at 20hz I bet it far exceeded the output of what you made.
How hateful and without productive feedback. I believe they call that a hater
the lack of calculations or though about resontant freq disappoints me.
this video felt meaningless.
Right, another reply hmm.
Going with the flow is wonderful, however, this could have been so much more than what it is.
i honestly suggest you try again but this time follow some hints from some fellow users and show your work, its not hard to measure the area of a cylinder and work out resonance nor is it hard to plot a response graph.
hmm, no, im more interested to see you improve what is :)
myself do a better job ?, if i put my mind to it possibly, however its only foreseeable when i'm paid for my time to play around with winisd and using a term lab and we all know that is nothing more than a dream, well at least in my current situation.
Yeah. With more time/money ;)
So does your comment provide productive feedback? How about I make things you do the homework lol
here's some positive feedback for you, don't delete your old comments.
So because you build things without doing any homework and get a result that 95% of people call you out on, makes you better ?...
Sorry but it does not.
It's homework that enables me to make things that in the end put trophy's on my shelf, while your still getting called out, can't show your work or any proof of concept and end up getting no where.
Have a wonderful day.
oh and one more piece of positive feedback: Hopefully you find something better to do than wait another two years, delete your comments and respond to them again.
Song???
Honestly this a very interesting video. I would have like to have seen better products used, as they would have most likely greatly enhanced what you were attempting. Also i must ask why the hearing protection?
He’s a con artist. This whole video is a joke.
Like the idea and the look . 👍
Technically you could tune in resonance with how tight the bass head is and what frequency it responds to
The problem is, even if you loosen the head all the way, it wouldn't even resonate anywhere near low enough to be of any use, and you have to plug the hole too.
Not be "that guy" but those speakers cables are silly big. We don't use that size even in pro EDM sub rigs or at metal shows.
@@DTW-bx2vy Thick speaker cables are unnecessary. Speakers run at high-voltage/low-current, the complete opposite of a car amp.
Well, I have a use for my old kick drum now.
So basically you just made a passive radiator
Tuned to 1000Hz.
Again. No.
So basically you've created a not so effective passive radiator.
What isn't? :) You put it in a drum. As the speaker moves, it will resonate the skin (which is acting as an un-tuned passive radiator). Just sayin.
LOL ok so you've built a poor subwoofer out of a large driver. That is what it is :)
It might be really loud at 1kHz, the tuning frequency.
No
You could use this set up to record that kick drum.
welp mission success, i can actually hear these on my subs.
i built a subwoofer that does 6'' peak to peak at 15hz ! it goes nuts on infrasonic sound , plays 1-20hz like a boss !
please share links or more info about these magical subwoofers that do 6" peak to peak at 15hz or play 1-20hz like a boss! No such thing as a subwoofer doing such things, perhaps a rotatory driver in a 25cuft enclosure.
He's not kidding go look at his TH-cam mazdas shit Is no joke
jeanious2009
Ikr you would have to have a extremely large sub or lots of subs to do that.
🙄🤔🤯
@@s10mafia61 well, excursion is only useful if you have cone area though
I also built one a 10 inch studio sub. They are selling like hot cakes. Great minds think alike
Thanks so so much worked perfectly .many thanks again
🤣 liar
you should flip the motor end and the cone end around so that its ported and it helps bass
Forza Fox does matter subs have a front and back that move and are same sizes, in other words you can tune both front and back, (6th order bandpass)
oh yeah nvm i forgot that exist hehe
The designer could achieve more success using the longest pipes from the body of the organ from the local church. Or it is better to use Timpani from a large symphonic orchestra, they are closer to his beloved infrasonic. But it was necessary to start with acoustics textbooks.
You just made a kick ass sub
30 hz is not that low a normal Bluetooth speaker can reproduce 30, and hearing protection for 70hz and under is not really needed. People sit in 165db vehicles at 30hz and there hearing is not affected.
Ha! Tight Man! I think all the drummers I know would get a kick out of it. No pun intended...
This drum frame is not enought deep..for 21".. maybe 2 pieces.
The build video turned out really great. Interesting idea to build an infrasonic sub! I like the design because it's very unique. Unfortunately what you're trying to do here is a bit like building a car that's going more than 250mph from e.g. a Honda Civic by putting a truck engine in it.
An infrasonic sub is a good topic for my DIY Subwoofer Build series. I'll maybe film a video about how and if that works in 2018 when I continue with the sub I'm currently building: th-cam.com/play/PL4lJ1ej0uWlQC7HWP82uNKYVokgEx39qQ.html.
Here are some problems which you might have had: a bass drum is an instrument. Every part of an Instrument produces sounds. A speaker should reproduce sounds instead of creating them. A driver produces no sound below its resonant frequency. By putting it into an enclosure the resonant frequency even rises. (There is the concept of URPS, Under Resonance Principle Subwoofers, but that needs a very powerful amplifier, 1000+ watts.) The bigger the cone area the bigger the enclosure volume needed for lower frequencies. The box needs to be at least as big as the Compliance Equivalent Volume (Vas) of the driver. (If it's the Pyle PDW21250 then 25 cubic feet.) If you put the drum heads back on you have a band pass enclosure which takes some effort to calculate correctly to get a suitable result. Professional drivers are designed for loud volumes not for low bass.
Possible solution: open baffle with powerful amplifier and an active subwoofer crossover. An open baffle lowers the resonant frequency but produces a loud peak in the midbass area.
Source of all my knowledge: German DIY loudspeaker magazine Hobby HiFi
Hatter? Not trying to do... Did
Lol. There was no actual sound recorded of the drum! He overlayed another clean bass audio over the actual sound of the drum. I bet it sounded like shit. The frequency he played was not even subsonic! It was more like a 40hz tone. On top of that, the video he chose to test was too high in frequency. 🤣
This whole video is a lie and rubbish!
You're removing all my faith in academia, one comment at a time
It's a Pyle PDW21250.
7:07 I think there was an earthquake. it turned out that the effect of the sound. I use an extra bass headset
The audio is so obviously dubbed over. I would love to hear how that actually sounds.
Sub audible and not repeatable on smaller speakers
@@morganrau It is repeatable on headphones... Also the song you played definitely didn't have sub bass frequencies in it.
@@JoshuasRecordings Unfortunately no not repeatable via headphones because the diameter of the woofer speaker needs to be very large to get the natural reverberations, as opposed to simulating the reverberations via some sound en/decoder and tricks of the mind ;)
@@morganrau The majority of headphones play down to around 15 Hz. This is because the drivers are so close to your ears. All you had to do is record your "invention" with any halfway decent microphone and it would come through just fine on almost all headphones.
@@JoshuasRecordings You won't hear anything because it can't play low bass. All you'll hear are upper harmonics.
Built a big T line box..then you can get super low..
Check out the bass drums Jason Tice at hempopotamusloudspeakers.com installed in his double bass drum set.Around 5-6 years ago, they installed 2 BEYMA 21" BEYMA speakers in the fronts of the bass drums.used for triggers AND for amplified sound. PA in a drum set.
Sweat. Two drums gives a lot of feedback. They must have spent a good amount of effort on eliminating air feedback... but cool anyway
You should calculate how much volume that subwoofer requires, then make a proper enclosure for that volume. That's how you can reach lower frequencies ☺️
lmao base test. what are you testing? free base? i prefer the bass my subwoofer prefers
YOU HOOKED UP A STEREO FEED TO A 2 CHANNEL AMP WITH ONLY 1 CHANNEL OUTPUT TO THE SPKR WITHOUT CROSSOVER NOT PROPER TEST FOR ME.
6:42 that's what she said
W H E E Z E
anyone else noticed the sinus sweep during the timelapse?
me lol but isn't a sinus sweep... this is a remix of "a milli"
I notice it, twice ..on my crappy Teinuro "stereo" ...thought it was interference from something the first time i heard it.
It's just a semi passive radiator.
Oh that's it eh. Oh no. So sad. Thank you for the lesson but you're just a comment.
You can use a subwoofer with the magnet spiders and coils removed just using the basket and cone which is the same thing Klipsch does with their reference series house subwoofers. Another cool idea would be using a whole intact subwoofer as a passive radiator but use the terminal leads as a device to recapture some of the energy and feed it back to the battery bank or capacitors. I wasn't meaning to come off as a dick though and sorry if it sounded as such.
There's also another project that some sound engineers use to mic kick drum which uses a 6 or 8 inch component or woofer as a microphone for the kick drum mounting it closely to the port.
The back side seems like the bass radiator of JBL.
Infrasonic sound is not audible, so, you created what you were looking for.
Thank you
Made what I felt ;)
7:50 - Turning up the volume. Hold up! Subs don't do Treble*!
sick noise, sick person. no music, only noise
wow, i wanna try this construction
wow a rattle box... and you act like its dangerous. my 1500wrms 18 well case a 12" sub to get half inch excision just from being on same room.
lol hearing protection what is that
Lol, you can't hear it ;)
Morgan Rauscher no lol🤣
use bridge mode
21 is small try 24 32wofer
Its not the actual sound we heard on your recording :D
I mean actual sound on the current video you're recording ^_^
Oh boy! A LAB! Science!
yep
ya mayne. , you dig
Why the hell should people not try this at home
good idea
Sorry bro but I didn't hear nothing of this sub play all through this video
It's BASS CANON not base, get it right. I played louder sounds when I was 14 the birds loved it, my cat slept next to my 15" 600 rms sub for hours, both the neighbors houses rattled, glassware would fall and break in the house, so don't dribble shit like you know anything about volume, come talk to me if you want to know what a real stereo is
You would get more Bass putting it into the right size cabinet, this isnt infrasound. The only true infrasound device at the moment is the rotary subwoofer.
haha - take it up with Pile Speaker Co. - but I think I agree with you regards infra-sound devices in general - hard thing to do.
Morgan Rauscher: Yes incredibly difficult; the trick is to push large volumes of air at high accelerations, apparently a 30cm rotary sub can shake houses a couple of miles away.
@@suzesiviter6083 SVS, JTR, Rhythmik and others produce subwoofers that produce useful levels of infrasound :) My system can produce 16Hz at 121 dB measured ground plane 2meter RMS.
@@thingsdemystified 16Hz at 121db sounds very optimistic, what sound level meter(SLM) did you use? I know the cheaper SLM's are grossly inaccurate at low frequencies.
I measured around that at 20Hz for a 120L subwoofer, not one of those compact designs that fudge the figures on marketing gumpf.
Try it before you knock it
ultrasound and infrasound travels through everything but a vacuum. the ear protectors do not help at all.... see richard king facebook and you will learn how i know this...good show
THANKS MORGAN VERY WELL DONE.....CHECK THIS HEAVY DUTY INFRASOUND AND ULTRASOUND: www.flickr.com/photos/asdfghjkl11/sets/72157666089547593
You need psychological help.
thanks for your professional help...
Wires speaker to one channel, plugs 3.5mm to 1/4” adapter in both channels, LOLZ.
I’m pretty sure you can go deaf, even though it’s silent 😅
Looks like a fail to me
Thank you for your positivity. Any advice?
@@morganrauyou literally had a guy calculate the right enclosure for you to build, but here you ask for advice? Why? You won't take a nano second to realize others know more than you when you're 5 minutes into a completely new field... Christ this is so bad. You, as a body of work, are one of the most insufferable people I've ever come across online. Fuck me sideways the baseless arrogance when talking to the peasants is hysterical. The emperor is naked, except everyone is screaming at him to inform him, and he just keeps replying "do the test yourself. Hater. Any advice? How do you like my new robe?"
Fake video!!! the sound that playing is recorded
haahahahah that sub was not producing 20hz :)
No. The chamber and speaker were together
Technically a very crappy 4th order with resonators and no seals
Giggity...pure Giggity..
Birds the Word
Crappy ass SVC 21" Pyle trash. Sundown, Crecendo audio, DC audio, PSI, SMD, Rockford fosgate, Alpine, Kenwood. anything above would kill this in a matter of seconds. this box is illogical because your only running with a max of something around 3.0 cu. ft^ MAX and your port is so wide open and theres absolutely 0 lenght on it it's just a leaky hole. you also have your leads going through 2 holes in the box which can cause distortion and can fuck with the tuning of the box making distortion or other things like box rise or resisitance changes. and as for hearing protection? I'm sorry but even if you had this in the proper box it needs you'd never ever be able to hit a high enough decibel to actaully damage your ear drums 85 DB at prolonged usages could cause somewhat hearing loss and I highly highly DOUBT this sub ever got near 85DB in that drum.
YOU SHOULD STOP MAKING AUDIO VIDEOS!!!!
You should stop hating
@@morganrau 😆
How is that possible most videos have audio!!!!!!
..afraid it's going to kill the birds. Lol