4x Quieter generator in 10 seconds
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- เผยแพร่เมื่อ 18 ก.ค. 2015
- Drop the decibels of a generator by 10db in 10 seconds without welding, building or virtually any out of pocket cost. I take a screaming loud generator and drop it an amazing amount, from 80db(a) to 70db(a) at 23 feet(industry standard testing) in seconds. This is only a proof of concept using a scientific approach.
I use a real decibel meter(not a phone) to show before and after real world results. www.amazon.com/gp/product/B00E...
Watch me show the difference with and without a auto muffler: • Quiet a generator with...
Absorption Muffler Video By BCTRUCK: • How to make your gener...
I've run temp checks and everything stays within a few degrees. The trick is to leave plenty of area for proper air flow. Any engine will only pull in so many cfm of air while cooling and it doesn't require 360 degree air flow. A standard air cooled engine pulls all of it's cooling air through a few square inches behind the pull start. The spacing left at each corner is probably 100x the required area for proper cfm in and out. Air cooled engines are run successfully in fully and partially enclosed areas all the time; ie Honda's full line of inverter generators are fully enclosed with only a small opening at the front and rear for air flow, Along with pretty much every RV generator, riding lawn mowers only leave partial openings for airflow to reduce noise and the list goes on. - แนวปฏิบัติและการใช้ชีวิต
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Hello! Great video! It's almost what I've done. But I take a 1" thick piece of fire proof sound foam that I glued to the particle board, with a thick moving blanket folded up right on top of it all, just like you did at angles. That works unbelievable well! I do not have a dbl meter , but it is much much quieter. Plus everything just lays down flat to take up almost no space. In windy areas I use a cargo net over the whole thing, with spikes set into the ground to hold everything in place. But at home I just made a nice weather proof box, with the same fireproof sound foam.
Awesome. I like the fireproof foam. That should drop the sound dramatically.
Kevin Voyer they have decibel meter apps 👍
K. R. V. I
Hey KRV! Can you possibly post photos of your matierals or a shopping list of them and how you place them to the generator... I just got my generator and your setup sounds greaT!! Thank you!!!
K. R. V. k
I did this to my wife, and man ! Does this work !!!
Which end did you install it on?
Lol
Ha! I see what you did there.
Good one man!
I got hearing aids and turned them off to achieve the same thing.
And I don’t need hearing aids.
In 2021, that’s a $200 enclosure. Hopefully wood prices come down at some point soon!
(Ok, maybe I’m exaggerating, but close)
I don't think you're very far off the mark
I was so bummed when I saw the payoff was using sheets of wood, guess we're all just 6yrs too late
People throw away things when they buy new ones, and free sheets of wood from a discarded cabinet are (for this purpose) every bit as good as new boards.
In 2024 thats a 1200$ enclosure 😂
Seriously? So just pile sh!t around it is your solution to a quieter generator. Genius!
Hahaha those are the exact words I said when I saw this video! "So... just pile some shit on it?"
lol hey it works
sure, most of us have 'junk' which, after a while is not finding uses. Clean out my sheds, garage, would have enough for neighbors, too. just stack it around at an angle.....
When I was in the army a "tactical quiet generator" was a Honda generator placed in a pit in the ground.
It worked
I have been researching inexpensive ways to quiet a generator and this video is by far the best I've come across. Thank you so so much.
Probably too late for it but you should look into hush houses. We use them for jet engine testing indoors
But remember if you restrict air flow your engine will not last long and if you add something like that big muffler it will add more back pressure and that will shorten engine and generator life !
I’m guessing that’s why his Subaru engine didn’t last because those things are bullet proof
In the Army, we put our generators in a hole in the ground or a berm of sand bags....Reduced the noise and makes the generator much harder to locate
kbbacon Makes perfect sense.
+kbbacon We did same in Russian army.
+kbbacon It would drown where I live. ;)
However, I could make a little berm to conceal it I guess.
ltyr2001 1 We burmed in Louisiana.
We did the same thing. One night a young soldier on radio picquet heard it stop but did nothing about it. At reveille we found the we had harboured up in a dry river bed and the watertable had risen and drowned the genny. He got in trouble and the mechanics were really pissed off because they had to completely rebuild it as water had seeped inside the motor.
Nice video showing that most generator noise is not always just the exhaust. The doghouse method of noise reduction has been used by commercial home generator companies for decades with great success. Your boards deflect most of the noise into the ground where much of it is absorbed. Simple, cheap and effective. We did a lot of exhaust modifications to small engines in an attempt to quiet them and not reduce power. We came to the conclusion that the quieter the muffler, the lower the power output from the engine. Enclosures are the best way to go. Nice video.
If you reduce power, you have not built a good enough flowing muffler. What works better (on race cars for example) is a sound cancellation box instead of a muffler. TH-cam David vizard, he has videos on building zero loss exhaust systems. Yes, they work.
@@lowrangeinnovascotia2930 are you referring to megaphone( or tuned) pipes like on racing two stroke engines? Use of soundwaves for back pressure??
@@h8troodoh Not really but that is also a great example of what an engine needs (two stroke/expansion chamber)
An engine should have ZERO backpressure. ZERO! If you have backpressure, you are not getting 100% performance. (why manufacturers now use headers when before headers were only for "race or performance" applications). They improved efficiency, period. (this resulted in more power/better mileage/etc)
A cancellation box takes the exh pulses and lets them go one way and sets up the resonance sent back to the exh valve to hit at the perfect time to cause scavenging. Not required on every engine in mundane duties, but the principals are the same regardless.
@lowrangeinnovascotia2930 I'd like to disagree on the zero back pressure, some engines require it,2 stroke piston port engines, for example, as the fuel air charge would be following the exhaust gates out the exhaust port so.. although they have designed deflectors on top of the pistons,the need for back pressure is still there. 40 year professional mechanic..🙂
Two observations; 1. If you do this in the summer, you run the risk of running a very hot engine and generator and causing a failure of each, or at least shortening the life of the unit.
2. You are allowing exhaust gasses to enter the intake- this will reduce the horsepower and also cause overloading and heating of the engine.
Allow room for it to breathe! Build a large insulated box with diverted vents and even an exhaust fan.
Or just stick a $5 box fan under the plywood to assist with air flow if your worried about circulation.
All true, just remember powering the fan will reduce a little of the already limited available electrical power.
Your not wrong, I tried something similar and when I shut it down I could hear a hissing noise, it was the fuel cap vent working to max, popped it off and removed the pre filter and the bottom of the tank was bubbling, literally boiling my fuel, God knows how much had just evaporated into the air🤦. Building a gasifier now to run it from but will keep the fuel side as well for a duel fuel setup and the tank I'm going to remove and mount away from the heat altogether.
65Ford, I learned a lot about acoustics from watching and reading some of the comments that were thoughtful. Thanks for the video. One way or another it will help me.
Thanks, I'm glad you liked the video.
Congratulations 65 ! You're hitting these fundamentals and concepts accurately.
Nice! Was planning to build an enclosure for mine with a powered fan, but I had not considered using sheetrock as a liner. Thanks for the idea!
Be sure to monitor temps. Restricting the airflows can soon lead to overheating.
Did you watch the video? He mentions airflow…
@@JosephQPublic LOL he restricted air flow that means the generator is running hotter than normal get it???
People typically lose power in the winter months, if they have a hot tub it's normally drained, plywood to protect the floor, then throw the genny in there and the cover on with half folded open. Much quieter! And bonus..... you can wire- in a 2 way switch to your hot tub so the genny feeds power to the house through the 30 amp hot tub breaker once you've flipped the main off. Works slick!
WHY ON EARTH would you EMPTY your HOT TUB in the winter? it's LITERALLY the BEST TIME to use one!
@@davidmichael7756 The Polar Bear Club👍
In the Artillery we used a lot of generators. We buried them in the ground with sufficient room around the sides for them to breath. We then stacked sandbags around the side of the hole up past the top of the generator. we left breather holes in the sandbag formation. on the top of the sandbags we put plywood and covered the plywood with sandbags. you couldn't hear the generator until you were right up on it.
+george washington I would imagine the sand/dirt would absorb sound very well.
Naw- you all were just deaf.
Same in the Royal Australian Artillery (of which I was a member for 20 years). In a pinch we use to put a flattened rations carton over the hole if we knew we wouldn't be in that gun position for very long.
thats what we did.
Combat engineer 🇨🇦 .Same idea.2 rows of sanbags 🐌 shell design.
My generator is quiet but that's mostly because I struggle to get it running half the time
airkraft1 Haha.. Yeah, they don't make much noise then.
sixtyfiveford
Nope
Before shut down, turn off fuel line to drain carb. Will start easier.
It's real quiet if you just keep pulling the starter cord to "run" the generator with the ignition off... good shoulder workout too.
Lol
I use acoustic ceiling boards, usually, I get them free when they are getting replaced. Just paint the outside white. The inside facing the genset absorbs the noise.
Fantastic video. As a person who has had their hearing decimated by power tools , sirens and air horns , (retired firefighter) , I can definitely appreciate the value of your video. Losing your hearing affects your mood and sleep as well as ability to communicate with people. Great video.
Don’t forget to watch this video about generator safety th-cam.com/video/I1jT3ANENvI/w-d-xo.html
Awesome demo. While in the Army, we had to dig a hole large enough to put the generators in while in use to make them more quiet. A lot of work, but it worked.
***** It makes sense.
I lined my slightly angled box (deflection) interior with carpet pad (absorbstion) and reduced 22 decibels! Thanks so much for the simple but great demo and information!
That's impressive!
MRrwmac @
I was thinking of doing something similar, but with “sound lining”, it’s an absorbent material about an inch thick. We use at work inside HVAC ducting..
Could you put the carpet pad on the ground under the generator? Will that absorb even more sound? My generator will be sitting on concrete. Thank you!
@@xyladivine259 yes
Smart use of acoustics, damn cost effective too! Wrap and staple some old carpet to those boards & knock off even more notable dB's.
Love the Ford 4x4 in the background! Great video as well.
How ironic is it that right as I get to your comment while scrolling, the 4x4 Ford makes its appearance?!?
This is a very nice video explanation. However, the author and most of the commentors have the physics of sound incorrect. As an acoustical expert i would point out the following. 1. a 3 dB reduction in the sound level is equal to a 50% reduction in the sound pressure level. 2. Where human listeners are concerned, it takes a 10 dB reduction in sound pressure to realize a 50% reduction in LOUDNESS. Loudness being the psychological aspect of sound and Sound Pressure being the physical aspect of sound.
Is that why it seems to be half as loud?
no one gives a shit
Thank you, I like your idea of deflecting the sound with the slanted osb, reminds me of the angles on the F-117 stealth fighter. Back in the 1970's in US Army, we would dig a hole deep enough for our genset and it would also deaden the sound.Sometimes you don't need a muffler. Yours is a great idea.
The Army is a great resource for field tricks like this.
Yes, Make work details were always a favorite.......
@@jamessheehan1045 😂👍
I can imagine most of the rude comments come from people that don't have what it takes to make videos to help people or they just hate people. But,, thank you for taking the time to PROVE it works and this is definatly an option. Good work.
Thanks, I'm glad you liked it.
Super useful stuff to know! Glass packs are often used as resonators on OEM car exhaust
i do this every time i camp with a generator , been using this trick for years , works great !
During an emergency which is the only time I would have to use my generator the sound is the last of my worries.
true
That would be true if you live far enough away from people otherwise you guys would have people who would want to steal your generator, I'm actually planning on using a type 1 VW 4 cylinder with a quiet muffler and a home built inverter generator and low rpm preferably 1800 rpm which is near idle speed with a belt driven governor for when loads change. So yes this issue would be a giant generator setup stationed in a garage or out building .
All i kept thinking is "I wouldn't be able to believe if my neighbor was doing this in their *front yard* "
No legit, great video. I just bought the Harbor Freight 4375W, learning any tips and tricks i can and I will absolutely be using this trick. Thanks, and subscribed!
I do a similar thing, temporarily, for my General. But also have built another version which provides about 3-ft spacing for fire protection and ability to redirect the sound into a particular direction into the dense forest. But this still leads to poor airflow for cooling. Even at -8F, the sound box will heat up to the 70’s, imagine when it is +80F.
We live off grid and do what we can to use the gens the least and the quietest. We will be enlargening the sound box and adding studio egg crate foam, hopefully before the winter.
That was awesome man, you wouldn't think someone would need to make a video like that but I tend to make things way too complicated so thank you
Nice demo!!! My cherry bomb made a slight difference and in my original video,I ran it at the end and used an iPhone Db meter app that was not even close to being accurate. I eliminated that part of the video and I still get flack for that,even though I've used the generator in many other videos. I've been keeping my eye on Craigslist for one of those small rubber sheds that I plan on retrofitting a fan and some absorption batting into. Great vid!
BCtruck, rebuild, repair,repurpose Thanks Brad. Yeah, the arm chair engineers are watching every move we make..... I get a fair amount of flack for using a performance muffler in my old video. I tell people to throw the hood up on their car and have their wife peg it at 3600rpm and tell me how quiet their car is now.
And now you have the shed. :-)
Looking forward to seeing your adaptations for shed & your new generator.
@@oldtimerlee8820 hello from 6 years ago!! Only took me 6 years to get the shed.
This was a really well done demo! Liked watching the decibels change on the meter as each wall went up.
Fantastic video. Got major inspiration now for my overly noisy “silent” Hyundai 6KW generator which I use on film sets. Thank you 🙏🏻
What about the Tremors? They’ll feel the vibration and eat it right away!
You mean the Graboids I thunk
The spice worms you mean?
@@MrKWiley918 No they're called Graboids
Ass Blasters too ....ha !
Snakoids people SNAKEOIDS 🤣🤣🤣
Fiberglass Ceiling tiles with the PLASTIC side removed should work like a GOLD MEDAL CHAMPION!
That osb is deflecting and absorbing because of the particle press. Never thought of that. Thanks for being so thorough and creative.
Thanks for watching!
I like the way you've applied known principles to create a simple and practical solution, I'm definitely going to try this! (including the suggestion to incorporate sound absorbing materials).
Great video, mate. Thanks.
I can say this because I'm from the Philippines. That is Filipino rigging at it's finest. Salamat!
Glad you like it. Thanks.
Anyone should be able to say it without being labeled racist.
Best generator shutter upper I've seen ! I've done all your tricks and it does work.
I'm not done with sine wave cancellation, though. I think that's the key. Somehow.
I also add a small cooling fan, plugged into the generator.
Thank you for the video, I had been thinking about swapping out mufflers but this makes mor sense.
After being a guitarist and playing in car garages, sheds ect. some carpet padding (used) and easy to find as well as egg crates glued or nailed onto the wood pieces facing the Gen. could help knock the noise level down another 8 to 10 decibels easily for free and easy to set up take down without carrying a clunky dog house box around lol Great video Sixtyfiveford !!
+Aaron Manderscheid I've done that. Had a low cost recording studio for a while which had egg cartons for the acoustic tiles.
Lynn Magnuson Yeah egg cartons and foam padding from Apartments or homes that were getting re-carpeted ! Worked really really well ...
9
Aaron #The80'sRocked Good idea! Thx.
Good idea
Man, I love this video! Your decision to show the reduction in actual decibels as you put up those boards, with camera on the sound meter, is pure genius. A fellow just can't forget that after seeing it. If it wouldn't be too much of a pay cut, you might consider becoming a teacher. Awesome stuff! Thank you so much for sharing!
+Jaddie Dodd Thank you very much.
Almost a decade old and still useful information. Thank you
You bet!
Thanks for the broad idea, particularly the angled surfaces.
Execution, as usual, is a bit of a beast - especially if it is to be durable.
I used a Harley Davidson muffler on mine, and next morning there were a dozen Hell's Angels camped around my generator ... :)
Seriously though, thanks for the demonstration ...
Haha. Thanks for watching.
Lol. Sweet
fossicker2000 😂😂😂😂
Sorry but real Harley Davidsons dont have mufflers 🤠
How long did it run before it broke. down
I used to run a generator on the back of my boat, to reduce exhaust noise I pushed a foot of copper pipe onto the exhaust tail, a 90° bend down the floor and then runs down into a small container of water. The exhaust gasses bubble through the water. Massive reduction in noise. It ran fine with no noticeable back pressure issues.
The sound deadener you were referring to is asphalt. Asphalt "peel-and-stick" waterproofing would work pretty well and is available at a lot of supply houses. It's the same rubberized asphalt with an HDPE film instead of foil which would be more difficult to source and more expensive. Great tip! I'll be trying that at my off-grid deer camp.
@Paul E, what about "Wet or Dry" you get at home depot, would that work? It is a sticky black rubberized tar like substance you brush on thick to stop roof leaks, or water proof 4x4 posts in the ground. I also use it on white PVC vent pipes that stick out of roofs so they don't look as noticeable on black roofs - plus the thick rubber does not wear away as quickly as black paint.
@@paulromsky9527 I don't know. I think the principle of the rubberized asphalt is to attenuate the vibration from sound waves. I'm by no means an expert in acoustics but is seems to me to work that way. I would assume that a rubberized coating would work similarly. I do know that the auto manufacturers use a sheet rubberized asphalt composite for sound deadening. It's gets applied to places like the firewall which is stamped sheet metal. The asphalt reduces sound transmission.
@@paulromsky9527youbare talking about mastic. And that would be a messy job. Upload a video. Lol
** A 3 sided dog house , works so well for us. 4 corner Posts - Humped Roof w/shingles, dirt floor. 👌🏼
can’t hear much from behind or from either side. Only from the front. the wood walls muffle much of the noise.
Don’t waste yer time on anything else. Tip it backwards to check oil/gas.
I know its work but I did-, I built a plywood box on 5 inch furniture wheels for my 3500W champion (cosco), cutout a 10 inch fan hole opposite exhaust end,- industrial fan from princess auto keeps the engine cooler on hot days, made a hinged hatch on top for pouring gas into tank, left an exhaust-roll in roll out genny hole to remove generator, used soundproof/ fireproof insulation inside stapled in with chicken wire, dropped 24-26 decibels-this was necessary for my use love it
***** Sounds like a great generator shed.
I read in Patrick Kelly's book where he talks about a guy living off grid and wore out an expensive generator after mere months running it to charge his FLA battery bank when the Sun doesn't shine and the wind ain't turning his windmill. He noted that it had 120v and 240v sockets, which went to taps on the generator head stater. He said he ran his charger exclusively on the 120v socket, and being all the load was on the 120v side, the generator head was unbalanced, the engine was under uneven load, it ran loud, and the fuel consumption was high. And the thing DIED after some months.
He bought another big gasoline generator, but he hooked a heavy industrial/commercial grade 240v/120v transformer to the 240v socket and ran all this 120v stuff on that, with the load on the generator head being balanced. The generator was quieter, it sipped fuel, and it lasted years without issue. Presumably it was still running good beyond the writing of the book.
I will try this !!! Very easy 👌... thank you. My neighbor refuses to use his generator because he is afraid of making noise because of his neighbor will get mad at him. I will pass this on. Thax a bunch!! God bless! 👍
Thanks, I'm glad you liked it.
I'm in the same situation. I can use it in emergency and only for short time. In the meantime, my food spoils
... and it looks so beautiful. Your neighbors must love it! 😖
If you only have the attention span of a 2 year old you can skip to 5:19 in the video. Before this I discuss the pros and cons of adding mufflers, both absorption and deflection styles and why mufflers won't get you where you want to be. This video is just showing proof of concept from a scientific approach.
The engine cools itself with a fan though a bunch of small holes the combined size of maybe a softball. The generator cools itself the same way with a similarly sized hole. So even left fully exposed the engine and gen head still only pull in a fixed amount of air. There are large enough gaps left at each corner to accommodate 50-100 times the required air for the engine/gen head to properly cool themselves. There is going to be very minor radiant heat that would dissipate upwards that isn't going to leave as easily but it hasn't been a concern. After numerous running tests the engine and generator head are plus and minus 2-3F at numerous locations between shrouded vs not shrouded. Some non pertinent items, like the metal frame are warm to the touch where normally they would feel cool if left out in the open. Air cooled engines are commonly run in enclosed spaces without issue. Of course common sense needs to be used and proper gaps at each corner need to be left to allow air flow.
lmao
Could've shorten the video to 30 sec
thank you for that!
David Sasson or you can do your OWN video and make it as long or short as you wish. =]
If the exhaust get restricted it will cause back flow destroying engine
Working in construction, we do the plywood trick all the time with our little generators when we're using them. Some of our larger diesel ones are already boxed in, so are pretty quiet, but we have a few ancient towable open-frame ones that are extremely loud. We try to stick them behind the sea-can or some other obstacle whenever possible, same idea, but bigger
Also, you just reminded me of something mentioning the square generator sheds. We've done a couple of school renovations, including music rooms. One of them had all of the walls on odd angles, nothing was quite square or plumb, and no large flat areas. Apparently it helps cut down on the echos considerably. It would look odd, but I wonder if that could be applied to making a generator shed?
Hey thanks for putting this up. Hey man, your yard looks fantastic!
Thanks. I'm glad you liked it.
Good thing to know for those impromptu situations. Thanks for the idea. And dude, nice yard.
Thanks.
+sixtyfiveford How about a "sound proof room"and venting your exhaust through the bottom of the room below ground...this would reduce the sound down very close to zero,very nice video,but sheetrock doesn't do well if it gets wet in the rain.
4 gauge A full enclosure with a cooling fan is ideal for sound. Leaning boards was just shows people they don't need to get technical and can easily drop the sound with stuff they may already have laying around.
+sixtyfiveford Oh I know...I guess the way that I was looking at it,if your spending a $1,000.00 or more on this type of equipment,one is not just going to lay boards on it.
I built a dog house for mine,it comes apart for camping. its really quiet. I have used a snowmobile exaust system too,it works much better than a car muffler and smaller. Dont use a really old one,use a newer one. I was surprised how much quieter it was using both.
hey right on, did the same. Works well to keep the snow off it too. And it's pretty secure inside it.
Good suggestions! The hour meter at the end made it even better. I am gonna put one on my lawn tractor.
We use a similar method in factories with barriers around equipment. Helps with OSHA and quality of workplace
I'm digging that Ford 4X4...
Beautiful truck
Thanks so much for such a simple solution. I've been fretting over which generator to get based on sound and this will open up so many options that I wasn't considering. Also thanks to the thoughtful comments and suggestions.
It's probably too late for this advice now but over 48 years as a mechanical engineer I've noticed that 'Honda engine' powered systems are consistently the quietest.
On a side note, with proper maintenance they're also one of the most reliable and long lasting. Not a personal pitch for Honda just something that caught my attention!
Very good idea. 3dB is a perceived doubling of amplitude (volume). Foil-backed constrained-layer butyl (Dynamat) is a panel dampner that lowers the resonant frequency of the surface it is adhered to. For a sound "barrier", mass-loaded vinyl is the product to use. To "de-couple" the MLV (mass-loaded vinyl) from a surface so sound isn't transfered via contact, closed-cell foam between the two is effective.
Excellent empirical engineering! The secret is LAYERING with various materials. The more layers, the more diverse materials ... the more attenuation. Thickness, distancing & geometry are more about redirecting the energy and filtering. Forcing energy to make the transition from one type of material to another is where the dampening occurs ... applicable to DC through 'daylight', seismic to cosmic. They all behave like waves of particles.
Informative as ever and that hour meter........... Well, dare I say GENIUS!
***** Your scooter needs an hour meter like this.
Can't see it because of the #$%&! ads that pop up on the screen near the end. >:-(
What "Style" of Doghouse Construction would you recommend?
Concrete pad with Rubber Floor Mats, or Styrofoam Insulation?
Thanks for sharing this video!
Take care,
🤓-Thomas
Sounds great for the noise level, but what would a containment box like one would make with these materials affect the cooling ability of the generator not to over heat? Aren't portable generators made to have complete airflow?
In construction we used to make a three sided box with a top and staple old carpeting to the plywood on the inside. The open side was away from us. Huge difference.
By using a 3/4 nipple that fits into the exhuast port of the engine and stepping it up to 2"x12" nipple and then back down to 1/2" nipple you will have a very quiet motor depending on how long the 1/2" is.
Sounds like a tuned pipe silencer and correctly designed, they are very effective, but most of the noise from a four stroke air cooled engine is mechanical and is transmitted through the engine case to the surrounding air. This is why most fixed placement gensets use fluid cooled engines.
Bear U liquid cooled motors are not only quieter...but usually it's more fuel efficient too as a liquid cooled engine is easier to extract horsepower out of then a fan or free air motor without heat saturation issues.
Love your 70's Ford truck
Very nice video! Love it! Have just learnt what I needed to know!
Nice demo, 65Ford ! I hadn't thought about tenting my mower engine in some stable way to minimize noise for the neighbors. I'll see if I can come up with something useful at low cost, too.
That would be a neat setup with a mower.
Cool demonstration, that really made it a lot quieter! I like your hour meter at the end! lol
***** Thanks Man..
cubbeezx Yes. It changes the perception of a "clock" to a time meter; of which it really is. I similarly put an analog clock on my furnace to monitor its runtime (powered a receptacle off of the vent blower power (only minimal wattage allowed)). An earth day, earth's single rotation, seems to lose reference quickly if one would be in the space station which circles the earth 5 times (?) a day.
you can't see the hour meter because 4adds in in each corner pop-up right at that time and obscure the whole area
Stop the vid @ 10:13 and you can see it is a clock with the Pink Panther on a scooter with neon light around the edges.
I looked, but the clock was blurry and not yet plugged in, so I still didn't see much of anything. I can't figure out why he would cover up that part of the video.
Nice tip, thanks man. A cool experiment would be to line the plywood sheets with the thin sound/heat insulation stuff like Dynomat, used on car interiors. Of course that would increase the budget but might make it even more quiet.
Ozzstar I tested out some rubber matting(conveyor belt) with good results. I almost bought a couple rolls of the foil/tar at the Home Depot(dynomat rip-off) but this worked so well in the testing I figured it would only be good for another 1-2db.
Every 3 decibels. The logarithmic scale which is compatible with the things we find in our world such as light and sound allows us to jot values on graph paper. With a sufficient number of samples we find if we connect the dots we have an exponential curve. The volume knob on a preamp ( a kind of amp which can variably amplify a line level signal, not to be mistaken for line voltage, has a logarithmic potentiometer which allows us to hear a volume which feels like how far we've turned the knob ) controls the volume of the sound. Logarithmic pots are great for audio applications. Linear pots are great for power supplies and the like. The Inverse Square Law ( physics ) tells us a sound will be twice as loud when the distance to the source is halved, and the sound will be half as loud when the distance to the source is doubled. Many people believe sound responds linearly because we think linearly. The same can be said of light and gravity.
Fabulous, I’m stoked and will try this. Thank you for a very direct presentation.
Hey Thanks, I'm glad you liked it.
Hi, that's a great demonstration of something so simple! FYI on the dB(A) scale, each 3dB(A) is a doubling of "loudness" or "volume", so that 10dB(A) reduction is a near 80% reduction in "apparent volume".
If you build a shelter you could line the inside with some heavy layer (self adhesive bitumen product as used in cars) and medium layer (felt as per cars again). You could even use egg boxes and fill some of the egg cavities with expanding foam. And build it so the sides are a little 'off square'.
Unfortunately you do need to vent any shelter. The generator needs fresh air to burn, just like a car. If the shelter fills up with exhaust fumes, the generator will simply choke and stall out.
I've only recently become a TH-camr and I'm loving your no nonsense approach. I'm inspired and am trying to do the same for my videos.
Substitute _"perceived"_ for "apparent" volume and more generally science illiterate people will understand what is meant. I don't mean to crack on you, I'm only making an observation of the sad state of education these days! 👍
your osb works better than ply because the panel has less resonance. they make guitars with plywood tops ("laminated soundboard"), but NEVER osb ones. if it has resonant qualities, it will pass the vibrations that match that resonance, and often amplify those frequencies. sheetrock, same same. if you're going to use ply, use thin panels, and "stand them off" in multiple layers with good double faced tape. inner ply mambos, tape absorbs a bit, so next panel just fox trots. repeat, next panel does a very sedate waltz. pipe foam insulation split tube foam on the panel edges would do about the same as double face tape does. that "white foam insulation" board between 2 layers of ply would be near ideal, but a potential fire hazard, and gasoline will make it "go houdini" (disappear like magic). the old time chevy nova "rubber carpet" would make a great isolation layer, as would those "hard rubber chain link style" door mats, while still allowing just about any fastening scheme to work. you could probably fashion a fairly efficient "breathing wall" for the intake side just out of such floor mats, staggered and properly angled, that would be just as good as ply, while passing far more air. window screening of "dead" varieties (like the plastic stuff) could probably do much of the same.
for you folks mentioning "studio egg crate foam", it actually does only what the vid mentions, only both forms at once, in a cumulative deadening process (pyramid wall reflects sound while absorbing some vibration, sound wave is reflected into another pyramid wall, cycle repeats ad infinitum). just like bullets, and light, the "ricochets" tend to be at 90 degrees of the angle of incidence (the angle the wave strikes the panel at, in the natural direction you would expect such a ricochet), so by structuring "angle of incidence" you control where the wave goes. bounce it between enough dampeners (vibe absorbers), it "dies" the death of a thousand cuts.
Just purchased a generator. You presented a simple solution to reducing noise. Thanks.
Thanks for watching.
Sixtyfiveford, you just gave me a good idea. I have a portable inverter generator I take camping. It's still loud at 20ft. Get an old doggie crate and line it with flame retardant Dynamat car sound deadening material. Leave one end open (for air circulation) and pointed towards the forest and away from campers. Thanks!!
One year on: how well did that work?
Old carpet stapled onto The underside of the plywood will reduce sound even more
Stapled to the outside would be safer.
When I was in the Army the Engineers used to bury them in a pit back in the rear for HQ, I have no idea how they did it or what they may have lined the pits with, but they were dead silent, you could stand on the top of the pit & not hear a thing & the Generators were in house built VW engines too!
The ground is a great sound absorber.
sixtyfiveford
but what happens when the ground absorbs all sound it can absorb, does it get noisy again???
calm down people it's a freekin joke. cool videos broseph, keep um comin.
Did the operating temp stay the same ? I would assume blocking airflow is going to heat things up some.
I built a 1 end, and one side box with a floor and hinged top out of plywood. So one open end and one open side. The top, side and end were lined with 1 1/2" styrofoam insulation. The exhaust side was facing the open side of box. The open end made it possible to roll the generator into the box. The hinged top made it possible to refuel easily. This was for my camp with a 5000w gen. The exhaust side faced the woods behind the camp. Worked well.
Awesome.
It’s easier than most of what the Jack wads on you tube do, and it’s easy venting.👍👍
Lmfao the Subaru joke it's so true haha
Good, I'll definitely try it for my champion generator. Thanks
Foil backed fiberglass duct board is fire proof light weight and should absorb sound you can find scraps at local HVAC installers dumpsters, if not big enough glue several pieces to thin plywood.
Very interesting video..thanks for sharing. From my experience, the only Robin / Subaru small engine that I've seen quit running were ones that were severely neglected. I saw one that was run with no oil till it knocked, then they put oil in it and it ran for a long time afterwards, knocking away for about a year. That was on a gas air compressor!
D. J. Tanner This one double failed. The oil level sensor that is supposed to shut off the engine when the oil is low, died and would not allow the engine to start. So the original owner pulled the kill wire to this sensor so it could be run. He sold it to a guy(never told him this was unplugged) who figured it had the low oil shut down so he never needed to check the oil.... wham bam bang, there's no longer a piston rod and she's mine now.
D. J. Tanner I am a believer in Subaru products. They have proven themselves over and over again.I have a 1995 wagon with over 500.000 miles and still going strong.
*****, I love anything Subaru. Our first Subaru when I was 10 years old, was a 1979 GL 1600 4wd Wagon. It's was tough, dependable and so fuel efficient and went like a tank in snow. Subaru customer loyalty is amazing! My fiancé will only drive Subaru vehicles.
D. J. Tanner I've seen quite a few of them die for no reason,and have gotten some great deals due to their failures..I would not buy anything with one of them on it unless the deal was practically a gimme,or good enough to compensate for the new engine that I am going to have to put into it before too long...
I've owned 3 Subaru 1 Nissan and 1 Toyota and 1 Honda, the Honda was the only one who blew the tranny. I'm not saying hondas are bad but Subarus make excellent products.
I wish my lawn looked that good.
+dmmadde Thanks...
Search LCN
Looks like a carpet
I have an APU on my truck, it’s a Diesel engine and loud as Fk!
It’s encased in a metal casing but I don’t see that quieting the generator down, I was thinking about putting a little bit of steel wool in the exhaust to help quiet the exhaust down and maybe a moving blanket over the casing of the generator when I use it, are usually use it when I’m parked.
In the army we used to just prop a six foot table on its side by the generator, it sure made a difference.
As stupid as it may seem, this deserves a like. It's ingenious and so simple? Cheers
Sixtyfive!? Your grass is on point 😂🙌🏽
Thanks.
A scaled-up suppressor should work fine for dampening the exhaust noise without affecting performance.
Basically have the exhaust go through a larger pipe lined with rockwool on the inside (but keep the original exhaust pipe's diameter free for unhindered gas flow).
Great video. Straight simple demonstration of a very simple but effective principle !
Thanks, I'm glad you liked it.
i'm sad that i couldn't see the hr meter due to your links to other videos but ill still watch
i had a gen like that with the suby engine and i ran it nearly constant for 3-4 months almost solid......then ran it 2 more months for atleast 18 hrs constant our a 24hr day.........it started using oil pretty bad but it still ran great.....i stiil have it....tore the engine down and it looks great on the inside.......rings are worn out, that was it........i was running my entire house with it....our power had gotten shut off.....i had unlimited gas for it cause i worked at a recycling yard and got all the gas out of junked cars that came in.......great engine in my opinion..........
Gary Marshall you environment killer.
I'm doing the same thing and mine has quite no compression and want start
@@michaelpalmer4160 when these are barricaded the air doesnt cool it properly! Kills the engines
The thumbnails of your other videos covered up the hour meter so well that I couldn't see it all. But thanks for the video anyway.
They do that on just about all videos! They are SO annoying when trying to watch to the end! I am not sure, but I think YT is doing that :(
Great video and illustration, thank you!
...sound baffles... makes sense.
It appears to be deflecting the sound into the ground, I would like to see how this works on solid ground or a wooden floor.
yep, on concrete or macadam , like a garage or driveway....
I hope you’re not planning to use one on an interior wood floor for hopefully obvious reasons.