SHS 311 FINAL.
From question to perfection| Study with confidence!
Objective psychophysics - Answer: there is definitely "correct" or "incorrect" answer
During the calibration of the MAP procedure, 0.5 volts of input to the headphone produced
100 micropascals of sound pressure measure by the microphone inside the manikin.
During testing, 0.1 volts of input to the headphone produced a sound pressure that was just
detectable for the listener. What was the hearing threshold in micropascals for the
listener? - Answer: 20 micropascals
What is the dynamic range of hearing? - Answer: from the softest sound level one can
detect to the loudest sound level one can tolerate
If the power remains the same and the duration increases by a factor of 100, what happens
to the sound's energy - Answer: energy increases by 20 db
If the Weber's Fraction for frequency discrimination is 0.1, and the base frequency is 900
Hz, what is the end in Hz for discriminating a difference in frequency from 900 Hz? -
Answer: 90 Hz
What is the approximate Weber's Fraction in db for intensity discrimination? - Answer: 1 db
What is masking? - Answer: the threshold for detecting a sound is increased due to the
presence of another sound
If a 1400 Hz masker is masking a 2803 Hz signal, what perceptual phenomenon occur? -
Answer: beatings between the signal and the second harmonic of the masker
APPHIA – Crafted with Care and Precision for Academic Excellence.
1
, The turning curve may indicate the shape of the internal auditory filter centered on? -
Answer: signal frequency
If a 2 db signal to noise ratio is required for tonal signal detection in the presence of a
broadband noise within a spectrum level of 50 db, what is the required signal-to-noise-
ratio for tonal signal detection if the spectrum level of the broadband noise is increased by
10 db? - Answer: 2 db
What is a critical band? - Answer: a frequency band centered on the signal frequency, in
which the masker can effectively mask the signal
What is the difference between backward and forward masking? - Answer: signal is before
masker in backward masking, while masker is before signal in forward masking
What is the theory used to explain localization in the azimuth plane? - Answer: duplex
theory of localization
Minimal audible angle is smallest at? - Answer: 0 degree azimuth
In the precedence effect, what is taking precedence? - Answer: the source sound takes
precedence over reflected sound in determining source location
What does M(pie)So refer to? - Answer: signal is inter aurally in phase, masker is inter
aurally 180 degrees out of phase
If a 68 db SPL sound is judged equally loud to a 50 db SPL, 1000 Hz tone, how loud is the 68
db SPL sound? - Answer: 50 phons
What is a sone - Answer: a measure of loudness
APPHIA – Crafted with Care and Precision for Academic Excellence.
2
From question to perfection| Study with confidence!
Objective psychophysics - Answer: there is definitely "correct" or "incorrect" answer
During the calibration of the MAP procedure, 0.5 volts of input to the headphone produced
100 micropascals of sound pressure measure by the microphone inside the manikin.
During testing, 0.1 volts of input to the headphone produced a sound pressure that was just
detectable for the listener. What was the hearing threshold in micropascals for the
listener? - Answer: 20 micropascals
What is the dynamic range of hearing? - Answer: from the softest sound level one can
detect to the loudest sound level one can tolerate
If the power remains the same and the duration increases by a factor of 100, what happens
to the sound's energy - Answer: energy increases by 20 db
If the Weber's Fraction for frequency discrimination is 0.1, and the base frequency is 900
Hz, what is the end in Hz for discriminating a difference in frequency from 900 Hz? -
Answer: 90 Hz
What is the approximate Weber's Fraction in db for intensity discrimination? - Answer: 1 db
What is masking? - Answer: the threshold for detecting a sound is increased due to the
presence of another sound
If a 1400 Hz masker is masking a 2803 Hz signal, what perceptual phenomenon occur? -
Answer: beatings between the signal and the second harmonic of the masker
APPHIA – Crafted with Care and Precision for Academic Excellence.
1
, The turning curve may indicate the shape of the internal auditory filter centered on? -
Answer: signal frequency
If a 2 db signal to noise ratio is required for tonal signal detection in the presence of a
broadband noise within a spectrum level of 50 db, what is the required signal-to-noise-
ratio for tonal signal detection if the spectrum level of the broadband noise is increased by
10 db? - Answer: 2 db
What is a critical band? - Answer: a frequency band centered on the signal frequency, in
which the masker can effectively mask the signal
What is the difference between backward and forward masking? - Answer: signal is before
masker in backward masking, while masker is before signal in forward masking
What is the theory used to explain localization in the azimuth plane? - Answer: duplex
theory of localization
Minimal audible angle is smallest at? - Answer: 0 degree azimuth
In the precedence effect, what is taking precedence? - Answer: the source sound takes
precedence over reflected sound in determining source location
What does M(pie)So refer to? - Answer: signal is inter aurally in phase, masker is inter
aurally 180 degrees out of phase
If a 68 db SPL sound is judged equally loud to a 50 db SPL, 1000 Hz tone, how loud is the 68
db SPL sound? - Answer: 50 phons
What is a sone - Answer: a measure of loudness
APPHIA – Crafted with Care and Precision for Academic Excellence.
2
