Hearing

Critical Thinking Question

Given what you’ve read about sound localization, from an evolutionary perspective, how does sound localization facilitate survival?

Hint:

Sound localization would have allowed early humans to locate prey and protect themselves from predators.

How can temporal and place theories both be used to explain our ability to perceive the pitch of sound waves with frequencies up to 4000 Hz?

Hint:

Pitch of sounds below this threshold could be encoded by the combination of the place and firing rate of stimulated hair cells. So, in general, hair cells located near the tip of the basilar membrane would signal that we’re dealing with a lower-pitched sound. However, differences in firing rates of hair cells within this location could allow for fine discrimination between low-, medium-, and high-pitch sounds within the larger low-pitch context.