Interaural time difference and how to find your phone instantly
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- เผยแพร่เมื่อ 27 มี.ค. 2019
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You can grab the white noise ringtone here:
stevemould.com/white_noise_ri...
OR, thanks to Musician Vahakn Matossian, you can use these lovely tones:
drive.google.com/open?id=1VO5...
The science of sound localization is really interesting. This video is specifically about interaural time difference and how mobile phone ringtones are badly designed for the way our brains detect sound direction. You can make you phone easier to find by changing the ringtone to white noise. Also, emergency vehicle sirens like ambulances are badly designed for the same reason.
The Tom Scott video I mentioned about reversing trucks is here:
• Why Do Reversing Truck...
How to set a custom ringtone on android:
www.androidcentral.com/adding...
How to set a custom ringtone in iPhone:
support.apple.com/en-gb/HT207955
How to set a custom ringtone on Windows Phone:
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So I was actually wearing headphones and still tilted my head around like the biggest idiot. Turns out that the time delay becomes significantly less noticeable when the source of the sound turns with you...
This is something called internalisation, and the reference you want is Boyd, Akeroyd and Brimijoin (may have got the wrong order there) from about 2011 :)
geez. I'm wearing headphones, and all I thought was, "huh, it apparently doesn't work for me. weird". thanks for pointing out the actual reason...
You made my day xD
I was hoping for a second run in the video where he swept the delay between left and right channels to simulate it for us headphone users.
I just woke up and this sounds smart.. what is it u say?
Dang it! Now I understand why I hear high pitch noises in wrong spots! Thanks for answering one of my sub-conscious questions!
Oh wow I didn't even see your username. Of course the best science TH-camrs watch each other's videos!
I heard this comment in his voice lol
:o
The high pitch noise must be secondary effect from electro thermal expansion of gases that the electrical engineers expose themselves at a often frequent basis.
There are also reflections, the higher the frequency of sound the more directional it is
Default tones also just don't work for people that are hard of hearing. My father in law got a new phone - claimed that it was defective because he kept missing calls. Took it back to the store, they said it was fine, etc. Finally, he brought it to me. He is standing across the room, holding the phone, I call his phone, it starts ringing nice and loud, but no reaction at all from him.
I take the phone, go in to ring tones and just start making changes while I watch him. After playing a dozen or so with no reaction at all, I play one - he looks up - "You got it to ring?". Set that as his ring tone. Problem solved.
It's unfortunate that there's never anybody on the line when it rings.
interesting
Thanks for this comment. I'm always annoyed when people complain about my ringtone. I can't help having rubbish ears, I was born this way - it's one of the only tones I can hear. Ditto alarm clock tone! People with very impaired hearing actually use vibrating pads under their pillows for their alarms.
@@bordershader Wow, seems like I do the same thing by setting my phone to vibrate for my alarm and putting it under my pillow..
It's to avoid waking up my family
It is easier to locate high pitched sounds if your ears are further from each other.
I once lived a place with a shared space with plants and we got a cicada somehow with some plants. It were driving us nuts with it's chirping, but we couldn't locate it until I held a 25 cm cardboard tube to each ear and walked around.
My neighbor were laughing so hard, but still was quite impressed when I found the critter :-)
"I don't know if you can tell from the video but Django is actually a GOOD BOY."
That part made me laugh so hard 🤣
He's such a good boy.
dirm12 we could tell! It was obvious he was a good boy!
I was fully ready for a science fact about something I maybe couldn't tell from the video and, y'know what? It was a science fact: Django is a very good boy.
Kinda hijacking this to say...
If ya like good boys and love the cute head tilt... Then go check out an old vlogbrothers song by Hank Green, This song is for Willy. It's entirely full of weird and potentially new noises designed for making a cute little puppers tilt their head a bunch to the new sounds.
There's also several vids around the same post date that include Willy listening to the song and just Willy being cute.
This is content. Holy moly. I never knew how badly I wanted to know the things you just told me until you told them to me but I am very glad that you did.
Well said
Well said x 2
Well said x3
That is the sum explanation of 99% of the time I spend on TH-cam.
Well said x5 (on behalf of Bumpy guy)
And of course...
*Well said x6*
"Make your phone easier to find, with science" ...oh that sounds boring.
*Oh, it's a Steve Mould video!*
*_Clicks_*
Saaaaame. I skipped it earlier today, and now I saw it was him
true that
Just remember where you left it Dummy !
In music production we usually arrange sounds in the stereo field using the pan control - basically altering the balance of the amplitude between the left and right channels.
But, just like this video, you can use what's called a Haas Delay instead, which alters the time relationship between left and right instead. The downside is you might run into phase cancellation issues if your stereo mix is ever collapsed into mono, what we call 'mono compatibility'.
That’s not quite accurate. The left/right shift of the perceived sound source mostly happens with delay times between 1-3ms, Haas‘ research was on larger latencies. He found out that even for latencies as big as 35ms the first wavefront arriving dictates the perceived direction of the sound, even when the succeeding signals are louder. The Haas-effect is mostly used in PA systems at concerts or talks: the sound is delayed in a way that the original sound reaches the audience first so they locate the sound correctly, and then the amplified sound reaches them to ensure everything is heard properly
There's also interaural level difference ILD and it's the second way of our brain telling us the location of a sound usually works better for higher frequencies... the ITD (which is covered in this video) works better for lower frequencies
That's why there are the AB and the XY micing technique
1:00 Steve experiments science on his better half
2:00 How you detect where a sound is coming from
3:30 Why some sounds are difficult to locate
5:50 How to change the find phone tune for Android (easy)
6:00 How to change for iPhone (you can't)
7:00 How birds make use of this
7:50 Why police sirens are difficult to locate and what can be done about it
9:50 Django is a good boy!
Amazing video Steve, as always - and thanks! :)
Delighted by the last bookmark! 😀
4:15 experience it for yourself
These timestamps are so deliciously well rounded
The problem with this video is the people who need it most can't watch it.
You can watch it on the phone of the friend who would be calling your phone. Sadly you still have to find your phone eventually.
Step one: get your phone. Oh.
What, nobody has a real computer any more? Just me?
Angel with the Phonebox [Angel Bear] never got a joke?
What, birds?
excellent video as always Steve. Keep it up!
Thanks!
@@SteveMould it's time to defend your fountain again!
The ambulances I heard in Paris were much easier to locate by sound than any other I've heard. They use the same siren in Morocco as well. It has two pitches that switch sharply between each other. This gives you both direction due to the inter-aural time difference at the alternation. And it gives you a sense of how fast it is coming or going because it is always the same two pitches so you can sense the Doppler effect. Sirens that smoothly rise and fall in pitch make both speed and location hard to hear.
If you watch some old TV or films, UK sirens used to be similar once upon a time.
Lies of spies ! Craft work. Gentlemen
That bit about the bird calls was super interesting! Always love your stuff!
-a 3rd year mechanical engineering student
Thanks!
The bird call triggered my cat and now he searches around the living room 😸
Higher pitch makes it easier to find the phone from longer distances.
Which is probably more important.
So we need a combined white noise + high pitch ringtone?
This is a very good point.
I don't think so really and here's why...
If you are at the gps location of the phone then you should be able to hear the white noise.
Unless its upstairs and if that's the case you're more likely to hear the vibration than the tone.
I think the Ambulance trials were a fantastic idea! It will be interesting to see if they plan to use it?!
I think it should alternate so we would have bought advantages.
@@photelegy I'm gonna make a new ringtone!
I’ve found the Find My iPhone tone is great for knowing which ROOM the phone is in, but then I’m left searching for over a minute under pillows. So a mix of high pitch and white noise would be great, but hey...Apple won’t let us change it.
Change your ringtone to just shout: YOU´LL NEVER FIND ME!
Alternatively... "Hey! Listen!"
"Marco!"
When I was a kid I found it incredibly hard to locate a cricket. It's chirping and I have NO WAY of telling where the sound is coming from. Both ears work and I have excellent hearing. WTF?
Crickets are HARD to locate. Their chirps are high pitched and short (probably pretty pure tone too) and then the cricket shuts up when you get close.
Did you have hair over the tops of your ears as a child? I learned once that the top handles higher-frequency sounds.
@@gildedbear5355 Why is that actually? Arent these sounds supposed to help them find each other?
@@NiejakiZoxico ah, but just because they are hard to locate for us doesn't mean that it's hard for them.
@@NiejakiZoxico Yes, if I recall it properly they produce the sound for reproductive purposes. Are the males calling the females.
This is one of the most interesting and multi-disciplinary youtube videos I've seen!
fun-fact. comment on 8:50 - the exact position can also be located thanks to the structure of our ears, which changes the incoming sound in different ways if it's coming from different directions.
If the sound is coming from your right hemisphere, then your left ear will not change the shape of the sound wave, however, the right ear will. And once our brain lined up one signal to the other, it will look at how it was distorted to find out not only the horizontal but also the vertical angle of the incoming sound. Moreover, it does so for multiple sounds coming from different directions, which is absolutely amazing. It really blows my mind how complex is the analysis of the incoming sound, that our brain does non-stop 24/7 like nothing.
UPD: dog's can't do this ear-shape-distortion-analysis, which is why they tilt their head every time.
Steve , I’m a huge fan and my son and I are binging on your channel. This is how you mix science with daily problems and that’s when people take more notice. We’ve just hidden each other’s phones and only my phone has the changed tone. Let’s do this. Btw this is helping our lockdown experience. Many thanks Steve.
i usually find it very easy to hear the cop sirens blaring behind me
Loki, I concede
If they're right behind me with lights blaring yes; but ambulances some distance away aren't immediately directionally recognizable.
It's A JOKE GUYS
R\woosh
I can't stop laughing between 6:00 and 6:30. I played it 10 times and it's still funny.
It's not a flaw, it's an iPhone feature
Me too pmsl.
Yes if I gave you some nice feature that let you set your own tone it would be too nice now and i have to charge you more oh sorry wrong channel I mean you'd set it to some stupid tone that you'd never be able to find.
Yup, I loved that too. A great way to say "Apple hegemony sucks" without alienating all the iPhone owners.
Apple: you shouldn't be losing your $1000 phone
The easiest sound to locate is a downward frequency sweep - a chiieeaaoouu type sound. It incorporates as much frequency range as possible, and it has more temporal precision than white noise. More distinctive too.
How'd you learn that?
It's also much more annoying.
This is how virtual surround sound on games and phones works for headphones! It processes the sounds with Interaural time differences and level delays. HRTF is amazing. Great video!
youll find that the pinna plays a vital role in creating tonal differences that make us perceive sounds externally, remove the pinna and just have a head it would be perceived inside your head. HRTF is overated, and thrown down our necks for some reason, while they dont explain the function of the pinna, the head isnt that important for creating binaural audio that it perceived externally when wearing headphones, so this proves that the head isnt required and that the pinna are the vital part of perception.
For low freqs, phase differences provide good cues, but not for high freqs, as explained. I'm always amazed that the brain can detect lags down to about 10 MICROseconds!
However, for high freqs, intensity differences are useful, due to the head shadow effect, whereas for low freqs that doesn't work well because long wavelengths bend around.
So these are somewhat complementary cues.
And then there are transfer functions due to the intricate shape of the ear that leads to interference patterns, the best cue for elevation and front/back localization that doesn't require head rotation.
So a noise that is high frequency and low frequency would be good for identification (aka white noise) because of these complimentary parts
The most important is to not be sinusoidal and have sharp attack (sound intensity rising quickly).
The precise measurement of timing between both ears, given sound speed of 330 meters per second and normal head size require a mechanism precise to the ~10 microsecond level.
The fastest neurons can create burst at 1 khz, so we are 2 order of magnitude short.
This theory is more credible than sound intensity, so this is a case of "faith", awaiting the first scientific discovery of any array of neuron that create distinct firing pattern for input signal timed with 100 khz clock.
@@moiquiregardevideo No faith required. We 'only' need microsecond precision, not 100kHz firing rates. Furthermore, it doesn't need to be encoded by a single cell; population firing will do. And special adaptations exist to achieve this (e.g. Calyx of Held).
From wikipedia with references (and plenty of literature on the subject): "Localization accuracy is 1 degree for sources in front of the listener and 15 degrees for sources to the sides. Humans can discern interaural time differences of 10 microseconds or less." en.m.wikipedia.org/wiki/Sound_localization
Another amazing auditory feat: for the softest audible sounds, the amplitude of vibration of the eardrum is in the order of the diameter of a hydrogen atom. Nature never ceases to amaze!
@@landsgevaer Diameter of a hydrogen atom?!?!?! Incredible! Absolutely incredible.
Do you happen to know the approximate "vibratory distance," so to speak, for the loudest sounds we can hear without damaging the ear?
Finally an explanation why I can never find the ambulance. I though it was only my handicap.
I watched this yrs ago, TH-cam brought it back. I must say this, Your wife is Stunning, wow! Keep up the great videos
Steve, your presentation is so great. Love that I found this channel.
You didn't pet your good boy 0/10 video.
He had to put the camera away to give a proper pet, that's why it was not included in the video
@@RodrigoCastroAngelo quite right. Django deserves a two handed pet.
We need a follow up
This situation clearly calls for a tripod.
He pet it with captioning
I have a fax/modem sound as a ring tone, quite effective even at low volume, but now I know why it's easier to locate once the initial handshake part is over and there is basically white-noise. However I think a high pitch phase modulation is still necessary to help you distinguish white noise from background noise in the environment, so also the initial part of the sound is useful, because our mind tends to cancel white noise . The perfect ring tone would be a mix of the two (not really nice tho)
I love your references to birds, we underestimate their abilities!
I'm glad you covered this topic as it confirmed what I suspected to be the case. I always wandered why reversing sirens are now white noise instead of tones with a very narrow frequency band and figured this was probably why. They experimented with having narrow blasts of white noise on ambulances but it just confused people so that idea was abandoned.
Now I understand why Steve always looks so happy. Lucky guy.
Love your reaction to the word "iTunes"...lol. I remember one day (long ago) importing a bunch of MP3s into itunes, then later when trying to copy them to another device I found out iTunes converted all the file names to seemingly random long stings of characters, and were no longer playable on other devices. Don't think I've bought an Apple product since.
That hasn't been the case in like.... 18 years? iTunes naming is perfectly fine.
5:46 just an extra. That might be why modern trucks and lorries use white noise when reversing rather than beeping.
Edit: should've finished the video
In the UK. In the United States, more and more trucks are being installed with a narrow-band, high pitch beep which is very annoying in truckstops. This tone will penetrate a truck's interior disturbing a driver sleeping in the bunk. A driver inside his truck isn't in danger of being run over by a truck backing up. I wish truck manufacturers and companies would go to a broadband, white noise backing beeper. My truck has the narrow band beeper but I disconnect it; Old school know to put 4 way flashers ON, roll down the windows, and know what their backing up to.
The trucks I hear sound like an eagle being strangled when they reverse.
They should use a mix of a beep and white noise.
I've found the reason my preferred method of scrolling through comments (middle click and cursor movement) only lets me go horizontally...
Great Video! Rarely do I still get surprised by educational videos on youtube but yours are somehow a lot more refreshing then the rest on here.
Thank you for sharing your research in this video, my mind was blown several times. Keep up the fantastic work. I am definitely a new subscriber.
THANKSGIVING
I have always instinctively while searching for a sound, placed both hands (like elephant ears) behind my ears then turn my head until the sound is loudest. It works especially well for frequencies that are hard to find.
I've got hearing loss in one ear so determining which direction sounds are coming from can be difficult. Weirdly enough I can actually locate where sine waves are coming very quickly because the noise inputs to each ear is different so I pretty much know exactly where it's coming from so long as it is fairly loud.
I frigging love your channel. Only just discovered it. Slowly working my way through the archive.
Anytime you want to do another video on sound, I will listen and give it a thumbs-up. This was great. Also, the links were great. Thank you!
You could also customize your ears by adding a tube and pointing it around in different places. Instead of the ear-reversing set-up, one with longer tubes that come out at the same place. This set up is also handy for locating the source of noises in particularly noisy, convoluted environments, like the engine compartment of a vehicle.
Steve, I like you and your channel. So much that I just bought one of your books for my grandson.
Hey, thanks David. I really appreciate that. Hope he likes it.
9:33 That confused look is so funny! It's like he's asking "Steve, what the heck is that?!?"
Adorable beginning! "I'm cold" oh and the dog is such a sweetheart too!
Hey Steve, rusty balls guy here. Another great video, man! In my day job I design embedded control systems, and in the naughties I was leading the electronics and software development activities of a fair sized medical device corporation. One of the big changes coming through medical devices at that time was a standard for alarms (sad that I know it as EN60601-1-8). Anyway, before that, it was irritatingly common for medical devices to use high pitched pure tones from piezoelectric sounders. Cheap, and everybody was using them, so they sounded like real medical devices. But you could walk into a ward with one or two going off and using the sound you might not find which bay had the alarm until it was too late. The new standard requires complex alarm sounds, which can only be produced by a proper speaker, which contains a minimum amount of harmonic content, and defines pulse shapes and durations. It makes quite a difference to aural location. Oh, and they also should have visible alarms too (flashing lights) to augment the audible alarm. There are a whole load more requirements, but I’ll have bored you enough with that already!
Interesting. I assume there is a ASIC for this? do you have the part number? the geek in me wants to read the datasheet.
Hey, that's really interesting! Great to know people are thinking about these things.
Interestingly, to locate up and down by your ear, the most important feature your body uses is the unique anatomy of your ear. If you just attach some modeling clay in the ear auricle, you start struggling to locate the source of noise.
Smartereveryday did a video on that topic as well. (Highly recommended)
I love how you investigate the most peculiar thing. Very intriguing!
Love your videos. From this one I learned a lot, not least that “consuming an API” is a thing. And that Jango is a good boy. Keep ‘em coming.
The shape of human ears has this lovely shape to modify the relative harmonic proportion of sound vertically versus front/rear.
When a sound has a sharp attack (intensity raising fast), such wave shape has many high frequency content. The Fourier analysis of AM modulation show an increase of bandwidth ; for example, a radio station emitting pure sine wave at 1 mhz (station number 100.0 on AM scale) with a modulation signal of 1 khz pure sine wave will show on a spectrometer a peek at 1000 khz with two lumps; one left at 999 khz and another right at 1001 khz.
Using your radio receiver, on can hear that tone while changing the tuner frequency from 999 khz to 1001 khz, showing that this bandwidth phenomena is not a mathematical tricks ; it is real.
As soon as a radio station has music or voice added, the transmitter frequency interfere with the nearby radio station with similar frequency. The louder and/or higher pitch music interfere with more distant frequencies.
This bandwidth increase explains why each radio station must follow rules about the frequency of consecutive radio station.
Brief, when a sound has a sharp attack, the relative amplitude of each harmonic allow us to tell the direction of sound up/down and front/rear.
Combined with the precise timing difference mentioned in this video, humans detect sound direction over a complete sphere, 360 degrees in every direction.
You may ask : does my dog, horse, ... has the same system? No, they rotate their hears to detect sound direction over a horizontal plane and tilt their head to rotate the plane which extends the hearing field vertically.
Their system rely on the pray or predator to emit more than one sound while human know where is the sound source on the first shot.
Our 360 sphere sound detection evolved when apes grew a brain so large that the ear lobes could not follow, it could not remain on top of the head.
Most people devolved, losing muscle control of the ear lobes. But since our hearing system is superior, losing those muscle is really evolution.
The very precise harmonic detection performed by the cochlea is as amazing as the echo location of bats. I give detail about the way it works on multiple messages on Quora. Search for "gingras cochlea" to find a few example and maybe update wikipedia page still mentioning "negative feedback" as reason for75% of cilias being motor vs 25% sensory.
Christian, thank you for your post, every day really is a school day.
Awesome video! We were making augmented reality games using audio (and no video) a couple of years back. We used earphones and mounted the phone on the head of the player to track movement. Then using these audio manipulation techniques to place sounds in a virtual overlay of the world.
Sounds awesome!
I never comment videos, but really, this one was really good! Don't know how you got an idea to do this topic, but really, amazing. Learned so much about something i never really gave much thought!
Just found this channel now can't stop watching all of your videos .Can't find such amazing content anywhere on TH-cam!
Thanks! Glad you're enjoying then.
How are you so factual and educational but not annoying and pretentious? It's truly remarkable.
So kind of like how if I cross my eyes in a certain way in a tile room, the two images in my eyes will match 2 tiles together that are actually 2 different tiles?
I'm unreasonably excited about you doing a video about an interesting project with Node since that's basically what I do for a living :D
After watching your videos i realise your wife is a very tolerant and special person. My wife says things like can you stop talking now!
How strange, I just voip called my phone to find it, only to see a notification for this video on the screen. What a coincidence!
I planned it this way.
And it's all thanks to the law of large numbers.
Well the two of you do, for a start :P
Google's algorithm knows everything
Ampphed
Further to that, I used Node-Red (via Alexa, “Alexa, where is my phone?”) to call my phone, and Steve mentioned that he’s learning Node-Red in this video.
I hope Django has a good endorsement deal. He needs to monetize his brand if he ever wants to get 1,000 treats per video.
... Making a living on youtube is RUFF.
Wow! Didn't knew that. That's very very impressive Steve. Thanks for the video
Did some numerical analysis projects with sound waves in college. Got a lot of intuition on how the ear tells directions, which is why I set my tile to use the ringtone that shifts the most in frequency. Still happy that someone gives a comprehensive breakdown on this topic.
When I use 'find my phone' I use the ring to find the room, then find it via vibration
"I'm going to make my wife wear it and do some experiments"
Only works if your wife's named Peggy.
best chanel I have found on youtube! thank you steve
This was really interesting as always :) love your videos :)
Natural aliasing, wow, that's amassing.
7:27 I was expecting an image of a different nature based on that description.
All of your videos are fascinating. Thank you.
I always thought the white noise on a vehicle reversing was them modifying it because the beep annoyed them. I always wondered this and never researched it. You have blown my mind, my favourite TH-camr by far!
Dont forget the frequency response is much more important than the Phase information!
Thanks for the white noise mp3. Unfortunately, it's too quiet to use as a ring tone.
Owls have one ear higher than the other to help locate sounds more accurately. This helps them tell front and back apart more easily and pinpoint the source. It’d probably comprise their vision a bit if they kept having to tilt their head
Mind blown! Fantastic video, thank you 👍
I only have one functional ear very frustrating. I have learned to shake my head back and forth to locate sounds.
pep1dog1 same here. It’s really frustrating!
me2
Gentleman,
I have to thank you a lot. Your content is accurate, on point and scientifically Correct.
Now I can explain phase difference and psychoacoustics to my mum with your drawings :D ahah
Jokes aside, MMmany greetings from Turin, Italy :)
I actually found your video by searching clip about interaural time different for my audio tech class. This is like learning the science and applied it to real life. Thank you so much.
Did they teach you anything about the vital importance of the pinna? if not, i think that part of the educational system is flawed, i believe even steve is just repeating what they say in books, as I think the pinna play a huge part in external perception of sound direction, sorry steve!
This explains SO MUCH! Thank you!
Steve Mould Thank You for the headphone warning (tinnitus here)
What is that
It shouldnt effect tinnitus. If anything it would effect people without tinnitus more
@@BijBijTCG
Tinnitus is a bloody annoying constant high pitch ringing in your ears.
Hey Steve! You two are a very cute couple. Great job on the awesome videos!
That was super interesting! Thank you for making this!
This was very interesting!!! Thanks for your great content:)
Clearly, Django is a good boy, yes. Excuse me but I must just go and present some test tones to my dog, who is also a good boy.
"interoral" fuck yeah man
I like homeless chicks that are inta oral
Very intriguing video. I can definitely apply some of these concepts immediately.
You may think I'm being facetious when I call this kind of content riveting, but I enjoy it sooo much. Thank you!
I remember those bloody horrible sirens being used in ambulance in Stafford in 1999.
Yes! It was '99.
So why were they "bloody horrible"? The sample sounded somewhat annoying, but sirens are supposed to be somewhat annoying so that you pay attention to them.
@@johnbennett1465 Indeed I get the same reaction when people complain that say that the sound of something like a fire alarm is annoying, it's like well duh it's an alarm it's meant to grab your attention and get a reaction.
@@johnbennett1465 From a sound design perspective it was an unpleasant sound, unlike the wail and yelp combo which are much more elegant. I'm not saying they were bad sirens. Also, 1. They were too quiet, 2. There was not enough publicity so a lot of drivers had no idea that it was an emergency vehicle until they saw it.
@@puddleglum3306 thank you for explaining. Living in the US, I had no knowledge of the situation.
Steve and Brad from Bon Appetit would be a great pair to watch doing a video together. They both appreciate a Good Boy, and they're both hilarious.
It's very informative and interesting . I see this things happening around me all the time but never knew why
You are a solid gold nerd, love your videos.
"You can't... do it.. on iphone." Synopsis of everything apple.
Isn't it basically the same reason that trucks in the UK and europe don't make the high pitched beep when backing up anymore. It's harder to locate that, than random white noise.
Yes, especially on sites where you have echoes.
Interesting subject. Well presented. Thumbs up.
impecable video. thanks for your work
Look at the guy showing off his wife :P
2:04 was that a pun I ear?
Man omg, i am mezmerized! You outdone yourselve there, steve!
Wow this experiment is really amazing. I have never thought of that and the way that the brain 🧠 locate sound source by aligning the signals of the two ears.
Thank you !
Mind. Blown. I'm never going to not think about this now whenever i hear a sound that throws me off.
This was a great video, thanks!
Great content! Thanks!
Great video. I learn a lot from this