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Auditory Perception Concepts

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Questions and Answers

What does the critical band refer to in auditory perception?

The band of frequencies that have the highest firing rate on the basilar membrane

The band of frequencies that are detected by the JND

The band of frequencies that interfere and mask each other (correct)

The band of frequencies that the brain cannot differentiate between

How is the Just Noticeable Difference (JND) related to the critical band?

JND maps almost perfectly onto the critical band, suggesting a connection (correct)

The JND determines the upper limit of frequencies within the critical band

The JND is a measure of pitch perception while the critical band is a measure of loudness perception

JND and the critical band are unrelated phenomena in auditory perception

According to Bekesy's Place Theory of Hearing, how is the frequency of sound indicated?

By the amplitude of sound waves entering the cochlea

By the thickness of the oval membrane connected to the round window

By the firing rate at different points along the basilar membrane (correct)

By the speed at which sound waves travel through the ear canal

How did Bekesy confirm Helmholtz's model of pitch perception?

By directly observing the basilar membrane when different frequencies were presented Signup and view all the answers

What physical property of the basilar membrane changes from the base to the apex?

Width and thickness Signup and view all the answers

How does the basilar membrane respond to sound waves according to Bekesy's observations?

By forming a travelling wave that deforms over time Signup and view all the answers

What role does the envelope of a travelling wave play in pitch perception?

Indicates maximum displacement of the basilar membrane at different times Signup and view all the answers

How does Bekesy's Place Theory suggest pitch is encoded in auditory perception?

By activating specific regions of the basilar membrane corresponding to frequency Signup and view all the answers

At what point along the basilar membrane is pitch believed to be coded?

Point of maximal excitation where specific nerve fibers are stimulated most Signup and view all the answers

What did Bekesy observe regarding how sound waves deform the basilar membrane?

Sound waves set up a travelling wave on the basilar membrane that deforms over time. Signup and view all the answers

What did Bekesy propose about how incoming sound waves interact with the basilar membrane?

Incoming sound waves deform different portions of the basilar membrane, coding for pitch. Signup and view all the answers