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/sci/ - Science & Math

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4355522 No.4355522 [Reply] [Original]

If someone snaps their fingers beside your left ear, the sound hits your left ear before it hits your right ear since the right ear is farther away, but you only hear one snap.

MIND=BLOWN

>> No.4355525

what

>> No.4355530

Uh, yes. This is why you can tell where sounds are coming from. It hits one ear before the other, and your brain has learned how to associate those small delays with direction. Up/down and front/back still have some differences because of how your ears are shaped.

Your brain was busy as *shit* when you were a little kid. So many damn things to figure out.

>> No.4355532

Do you have any idea how slight the time difference is?

>> No.4355538

>>4355530
What's more, you can reproduce this effect to get perfect positional audio with headphones.

http://en.wikipedia.org/wiki/Head-related_transfer_function
http://www.youtube.com/watch?v=U3MvVPgLJWc

>> No.4355541

>>4355522
The sound arrives at the other ear less than 0.001 seconds after the first.

MIND = NOT BLOWN

>> No.4355543
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4355543

>>4355530
Doesn't explain why you only hear one snap.

>> No.4355547

>>4355543
Actually, yes it does. Your brain has this shit under control. Also
>>4355541

Vision is even worse. The raw feed coming from your retina is garbage.

>> No.4355549

huh

>> No.4355555

>>4355538
>that video with headphones on
HOW IS THIS POSSIBLE

>> No.4355556
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4355556

>>4355547
>Actually, yes it does.

Why would your ear/brain need to combine the two signals for positioning purposes? If anything, that's making it *harder* for you to figure out where the sound is coming from.

>> No.4355563

>this thread

8.5/10

>> No.4355567

>>4355556
This post doesn't even deserve a reply, especially given your name.

>>4355563
But I'm salvaging it with cool shit and science!
>>4355538

>> No.4355571

>>4355547
>raw feed coming from your retina is garbage

Care to expand on this? I am intrigued.

>> No.4355572
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4355572

>>4355567
>This post doesn't even deserve a reply, especially given your name.

Wow, you sure told me.

>> No.4355573

>>4355571
If there's anything someone pulling crap out of his ass knows how to do, it's expand on said crap.

>> No.4355579

sound travels at the speed of light, so I don't think your brain can even notice the differents

>> No.4355585

>>4355571
It's not a camera feed, to say the least. There's all kinds of sources of noise and shit that get completely thrown away, holes that get patched, etc. Your vision centers have learned to make sense of what's coming out of your eye and to patch up the holes. Like how you don't generally see the veins on your retina, or the blind spot. Have you done any of that stuff about finding your blind spot?

There are cells in your visual cortex that are specially keyed to detect edges oriented in a certain direction, motion in a certain direction, etc. Lemme try to find some good sources of stuff I've seen before on this.

>> No.4355588

>>4355579
You can't consciously, but your brain picks up on it. It's all subconscious processing.
>>4355530

>> No.4355593

>>4355585

Yeah, I'm found my blind spot before. Its a rather simple exercise, but interesting at the same time because it becomes clear very fast just how good our brain is at filtering the bullshit out of our senses.

>> No.4355599

>>4355593
Here's one:
http://www.youtube.com/watch?v=o3g66FRUYww

I didn't find the whole documentary yet, and it's just one of many things I've run into (sorry I don't have the links).

The color illusions (like they do about a minute or two in) are a big part of this. If your eyes were just cameras and your brain just looked at the input without heavily altering it, they wouldn't be possible.

>> No.4355606

>>4355599
Here's something new that I haven't fully read yet:
http://camelot.mssm.edu/~ygyu/constructingvisualimage.html

>> No.4355613

>>4355579
>sound travels at the speed of light
notsureiftrollingorjuststupid.jpg

>> No.4355670

>>4355599
Watched the second part and the McGurk effect is really interesting.

>> No.4356729

Your the best new tripfag, ITG.

>> No.4356800
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4356800

>sound travels at the speed of light
apparently we have aircraft already traveling faster than the speed of light.
Mind = Blown @ the stupidity.