Auditory scene analysis

Question 1

What is Auditory localisation?

Answer 1

Auditory space surrounds an observer and exists whenever there is sound

Question 2

True or false auditory sound is much more accurate when sound is directed from front, sides, or behind the ear?

Answer 2

True

Question 3

Sound location cues?

Answer 3

Binaural cues- Based on 2 ears

Monaural cues- based on 1 ear

Question 4

What frequencies does the interaural time difference work best for?

Answer 4

low frequencies (at high frequencies it becomes difficult to know which feature arriving at the near ear matches which feature at the far ear)

Question 5

What frequencies does the interaural level difference work best for?

Answer 5

high frequencies there ( is a little acoustic shadow at low frequencies)

Question 6

What does the monaural cue for vertical localisation depend on?

Answer 6

primarily on spectral cues caused by folds in the pinnae (1 ear)

Question 7

How do you judge distance?

Answer 7

The relative intensity of the sound. less intense with greater distance

Question 8

What is the doppler effect?

Answer 8

change in frequency of a moving sound source(eg beeping a car far vs close change in intensity and frequency)

Question 9

What is the precedence effect

Answer 9

When a sound is followed by another sound separated by a sufficiently short time delay (below the listener’s echo threshold), listeners perceive a single auditory event; its perceived spatial location is dominated by the location of the first-arriving sound