Sound

[Bazile]

If for example , you tap your finger very very lightly on the  surface of an object, does it make a sound , even though you can't hear it ?

[douglas9401]

Yes.

[Canary42]

Try it on your ear - I think yes is correct.

[Old_Geezer]

If you define sound as the existence of sound waves, then yes.

If you define sound as how the brain interprets those waves,  then no.

[bookbinder]

Yes, it does. If someone happens to be near you, they will most likely hear it.

[Bazile]

''If you define sound as the existence of sound waves, then yes.''

Surely sound only exist if there is a  device to capture and process the waves - i.e. ears

[Atheist]

Yes, Baz. But if you're deaf then you wouldn't hear it although someone else would.

[Khandro]

If a man makes an assertion and his wife doesn't hear it - is he still wrong?

[Old_Geezer]

Onky if you think sound is the experience baz. Not if you think sound is the wave.

[ToraToraTora]

yes, sound is vibration through a medium and that happens regardless of any sort of detection.

[Canary42]

That's an interesting definition of sound. So why can't anyone else hear my tinnitus which is quite loud to me?

[perseverer]

The subject has been considered for centuries. If you need to occupy a few minutes, read this. 
 

https://en.wikipedia.org/wiki/If_a_tree_falls_in_a_forest_and_no_one_is_around_to_hear_it,_does_it_make_a_sound%3F 

[ToraToraTora]

because that is caused by an electrical fault in your hearing system. Sound enters the ear and gets converted to electrical impulses that get converted by the brain into what you know as sound.

[ToraToraTora]

11:23 that's been a philisophical disucssion. The Scientific one is very simple. Sound is vibration of the medium any detector set up to detect it will if it is in the vicinity and is sensitive enough.

So if I have a recorder in the area when the tree falls the sound will be recorded.

[ToraToraTora]

11:24 was for 11:21

[Henry1865]

Occasionally when classical piano music is being played it's possible to hear the sound of the fingers striking the keys - as well as the music.