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Why some people can hear this silent GIF

bbc.co.uk

11–18 of 18 posts

Re: Why some people can hear this silent GIF

#12
I suspect it's due to people tensing their lower jaw in anticipation of a loud sound. I can do this at-will, and I hear something that I would describe in similar terms. I also triggered/heard it the first time I watched the animation (and I don't think I did it deliberately, although I was expecting it to happen).

My theory is that it's due to the jaw muscles vibrating when they tense, so an entirely physical sound conducted through the jaw/skull; rather than a neurological sound. I expect if you stuck a sensitive enough microphone in my ear, it would be audible.

Re: Why some people can hear this silent GIF

#13
post #8
post #5

I'll propose a theory: very loud, low frequency sounds actually create small vibrations in your eyes, and most brains have learned to pipe this sensory input to the auditory cortex. So, the shake in the GIF triggers a "sound" through your eyes.

It could also be the tensor tympani muscle tightening in response to a visual event that would normally be accompanied by an extremely loud noise.

That's also my theory. I can do it at-will by tensing my jaw muscles and I hear a "thudding" vibration sound. (Although I wouldn't have known what the name of the muscle is until your post.)

Re: Why some people can hear this silent GIF

#14
post #12

I suspect it's due to people tensing their lower jaw in anticipation of a loud sound. I can do this at-will, and I hear something that I would describe in similar terms. I also triggered/heard it the first time I watched the animation (and I don't think I did it deliberately, although I was expecting it to happen). My theory is that it's due to the jaw muscles vibrating when they tense, so an entirely physical sound…

It may not even be tensing of your jaw.

https://en.wikipedia.org/wiki/Acoustic_reflex

Maybe this GIF is causing this reflex to fire. In the absence of the loud anticipated sound, your brain may be interpreting the flexing itself as a sound.

Re: Why some people can hear this silent GIF

#15
post #13
post #8

Earlier quoted context omitted.

It could also be the tensor tympani muscle tightening in response to a visual event that would normally be accompanied by an extremely loud noise.

That's also my theory. I can do it at-will by tensing my jaw muscles and I hear a "thudding" vibration sound. (Although I wouldn't have known what the name of the muscle is until your post.)

I can't do it at will but few times I was waken up by the "sound" of it vibrating, quite a scary experience!

Re: Why some people can hear this silent GIF

#16
post #14
post #12

I suspect it's due to people tensing their lower jaw in anticipation of a loud sound. I can do this at-will, and I hear something that I would describe in similar terms. I also triggered/heard it the first time I watched the animation (and I don't think I did it deliberately, although I was expecting it to happen). My theory is that it's due to the jaw muscles vibrating when they tense, so an entirely physical sound…

It may not even be tensing of your jaw. https://en.wikipedia.org/wiki/Acoustic_reflex Maybe this GIF is causing this reflex to fire. In the absence of the loud anticipated sound, your brain may be interpreting the flexing itself as a sound.

Yes. I expect that's it. I think the jaw tensing may be a side-effect of how I get that to happen.

Re: Why some people can hear this silent GIF

#18
post #10

I dont see a gif in this mess of JS. Anyone have a direct link?

https://i.imgur.com/ga7w2z3.gif

(extracted from that!) https://i.imgur.com/ga7w2z3.gifv

ah. thanks! very cool. I also 'hear' a 'boom/crunch/heavy thing dropped" sound when it lands, almost for sure due to the camera shake confirming to my brain the (absurd given the distance and mass!) expectation that the ground moved. https://en.wikipedia.org/wiki/Synesthesia

How is it a firefox request for https://i.imgur.com/ga7w2z3.gif ends up returning html, from which I extracted that gifv link, but a python request directly for https://i.imgur.com/ga7w2z3.gif ends up with the correct resource (sha1: f1f24ca2629ed88ee430eba90429fef2a4abc560)?

imgur....

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