Sound travels in waves of varying frequencies, actually generating the sound when it strikes our ear drums. Sound is generally measured in Hz's with higher Hz indicating shorter waves and thereby higher pitched sounds. The opposite is true for the lower end of the scale and generates lower pitched sounds. Sound is also able to scatter when striking hard surfaces instead of bouncing.
The video followed the life of a man that has lost his hearing to the point of almost being deaf. It also shows us the hearing aid he now uses and how he got to that point. I'm just wondering when if we'll have to develop more technology to counterbalance our increasing noisy world.
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