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3BHow Your Hearing Works
The speed of the vibrations created by an object which is emitting
sound, make a difference in the pitch of the sound we are able to hear. A
high pitched sound is the result of very quick vibrations; and a low
pitched sound, conversely, is the effect of slow vibrations. These sound
waves are picked up by the outer ear and channeled into the interior
components of your ear.
Designed for Hearing
Humans have pinnae (the outermost part of the ear) which point
forward and have a myriad of curves that catch the sounds that are
traveling all around us. Unlike other mammals, human beings cannot
move their ears in the direction of sounds. If you have a dog, you have
probably seen him perk up his ears and turn them to the side and
forward again, attempting to find the source of the noise. Predatory
animals as well as their prey use their ears to hunt and to hide,
respectively. Human ears are positioned more for communication than
for hunting, but you can augment your ability to hear by cupping your
hand behind your ear, and this channelizes the sound more effectively.
If you have larger than average ears, take heart - you actually hear
better than your smaller eared friends, because your large pinnae can
collect more sound than smaller ones!
Our brains are able to interpret the distance and placement of sound
because of the way the sounds reach our outer ears. A sound that is
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