How can humans perceive multiple sounds at once?
a. Each portion of the basilar membrane vibrates at a unique frequency, and multiple regions can be stimulated at
the same time.
b. The more frequencies of sounds that are present, the further the sound travels into the cochlea.
c. We have two ears, each perceiving a subset of frequencies in the environment.
d. The fluid in the middle ear can transmit multiple frequencies to the oval window.
e. Sounds reaching the left or right ear result in different nerve impulses.
ANSWER: a
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