The flexibility of the basilar membrane varies along its length. Activation of different regions of the basilar membrane enables perception of sounds of different:
A)pitch.
B)amplitude.
C)intensity.
D)loudness.

Question

Quizplus · Accepted Answer

Different regions of the basilar membrane vibrate in response to different frequencies (measured in hertz, or Hz) of sound waves, with higher frequencies causing vibrations closer to the base of the membrane and lower frequencies causing vibrations closer to the apex. This allows the brain to differentiate between sounds with different pitches, making choice A the correct answer. Amplitude, intensity, and loudness are all related to the amount of force or energy in a sound wave, which can affect the perceived volume but not the pitch.

The Flexibility of the Basilar Membrane Varies Along Its Length