Lecture 18

Question 1

Implied polyphony/compound melodic lines/ auditory stream segregation

Answer 1

when a single instrument alternates rapidly between streams of low and high notes, the listener perceives it as two separate melodies

Question 2

Proximity in time

Answer 2

sounds that occur in rapid succession usually come from the same source

Question 3

Auditory continuity

Answer 3

sounds that stay constant or change smoothly are usually from the same source

Question 4

When tones were interrupted by gaps (silence condition) listeners perceived that the sound ___

Answer 4

When tones were interrupted by gaps (silence condition) listeners perceived that the sound stopped

Question 5

When tones were interrupted by noise (noise condition) listeners perceived that the sound ___

Answer 5

When tones were interrupted by noise (noise condition) listeners perceived that the sound continued behind the noise

Question 6

visual capture (aka the ventriloquist effect)

Answer 6

occurs when an observer incorrectly perceives a sound as coming from a location suggested by visual information, represents an example of vision ‘superseding’ audition

Question 7

Two-flash illusion

Answer 7

single dot flash on a screen is misinterpreted as two flashed dots if accompanied by two beeps, represents an example of audition ‘superseding’ visual input

Question 8

Coordinated receptive fields

Answer 8

refers to neurons which respond to multimodal stimuli e.g. sound and vision that originate in common regions of space

e.g. a neuron in parietal lobe might respond to visual information in the lower left of your visual field and sounds coming from that same point in space

Question 9

Echolocators

Answer 9

creates clicking sounds