SHS 311 FINAL EXAM QUESTIONS AND
ANSWERS GRADED A+ 2025/2026
Objective psychophysics - ANS 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? - ANS 20
micropascals
what is the dynamic range of hearing? - ANS 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 - ANS 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? - ANS 90 Hz
What is the approximate Weber's Fraction in dB for intensity discrimination? - ANS 1 dB
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, What is masking? - ANS 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? -
ANS beatings between the signal and the second harmonic of the masker
the turning curve may indicate the shape of the internal auditory filter centered on? -
ANS 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? -
ANS 2 dB
what is a critical band? - ANS 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? - ANS 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? - ANS duplex theory of
localization
Minimal audible angle is smallest at? - ANS 0 degree azimuth
in the precedence effect, what is taking precedence? - ANS the source sound takes
precedence over reflected sound in determining source location
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
ANSWERS GRADED A+ 2025/2026
Objective psychophysics - ANS 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? - ANS 20
micropascals
what is the dynamic range of hearing? - ANS 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 - ANS 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? - ANS 90 Hz
What is the approximate Weber's Fraction in dB for intensity discrimination? - ANS 1 dB
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, What is masking? - ANS 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? -
ANS beatings between the signal and the second harmonic of the masker
the turning curve may indicate the shape of the internal auditory filter centered on? -
ANS 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? -
ANS 2 dB
what is a critical band? - ANS 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? - ANS 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? - ANS duplex theory of
localization
Minimal audible angle is smallest at? - ANS 0 degree azimuth
in the precedence effect, what is taking precedence? - ANS the source sound takes
precedence over reflected sound in determining source location
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
