Naked Science Forum

On the Lighter Side => That CAN'T be true! => Topic started by: Salman on 28/02/2011 18:30:04

Title: Where do sound waves finish?
Post by: Salman on 28/02/2011 18:30:04

Salman asked the Naked Scientists:
   
Where do sound waves finish? And are there waves that have finished or exist that we can't hear?

What do you think?

Title: Where do sound waves finish?
Post by: RD on 28/02/2011 18:45:23

Quote from: Salman on 28/02/2011 18:30:04

Where do sound waves finish?

In a dead heat  [:)] (http://www.freesound.org/samplesViewSingle.php?id=37215) ... http://en.wikipedia.org/wiki/Heat_death_of_the_universe

Quote from: Salman on 28/02/2011 18:30:04

are there [sound] waves ... that we can't hear?

Yes infrasound (http://en.wikipedia.org/wiki/Infrasound), ultrasound (http://en.wikipedia.org/wiki/Ultrasound), and the sound of Jehovah’s witnesses knocking on the front door.

Title: Where do sound waves finish?
Post by: JMLCarter on 12/04/2011 00:07:50

Sound waves attenuate rapidly beyond detection by the human ear. The energy in the sound wave ends up as thermal energy in the medium through which it passes (the air is warmed up).