SHS 311 Final Exam Questions and Answers With Verified Solutions 2025
Objective psychophysics - ✔✔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? - ✔✔20 micropascals
what is the dynamic range of hearing? - ✔✔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 - ✔✔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? - ✔✔90 Hz
What is the approximate Weber's Fraction in dB for intensity discrimination? - ✔✔1 dB
What is masking? - ✔✔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? - ✔✔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? - ✔✔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? - ✔✔2 dB
, what is a critical band? - ✔✔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? - ✔✔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? - ✔✔duplex theory of localization
Minimal audible angle is smallest at? - ✔✔0 degree azimuth
in the precedence effect, what is taking precedence? - ✔✔the source sound takes precedence over
reflected sound in determining source location
what does M(pie)So refer to? - ✔✔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? - ✔✔50 phons
what is a sone - ✔✔a measure of loudness
if a sound consists of the following spectral componentsL 375 Hz, 500 Hz, 625 Hz, 750 Hz, and 875 Hz.
What is likely to be the perceived pitch in Hz? - ✔✔125 Hz
can temporal periodicity and spectral structure explain all of the experimental data on pitch perception
of complex sound? - ✔✔no
psychophysics - ✔✔the study of the relationship between the physical variables of environmental
events/objects and the sensation and perception that they elicit
Objective psychophysics - ✔✔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? - ✔✔20 micropascals
what is the dynamic range of hearing? - ✔✔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 - ✔✔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? - ✔✔90 Hz
What is the approximate Weber's Fraction in dB for intensity discrimination? - ✔✔1 dB
What is masking? - ✔✔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? - ✔✔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? - ✔✔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? - ✔✔2 dB
, what is a critical band? - ✔✔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? - ✔✔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? - ✔✔duplex theory of localization
Minimal audible angle is smallest at? - ✔✔0 degree azimuth
in the precedence effect, what is taking precedence? - ✔✔the source sound takes precedence over
reflected sound in determining source location
what does M(pie)So refer to? - ✔✔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? - ✔✔50 phons
what is a sone - ✔✔a measure of loudness
if a sound consists of the following spectral componentsL 375 Hz, 500 Hz, 625 Hz, 750 Hz, and 875 Hz.
What is likely to be the perceived pitch in Hz? - ✔✔125 Hz
can temporal periodicity and spectral structure explain all of the experimental data on pitch perception
of complex sound? - ✔✔no
psychophysics - ✔✔the study of the relationship between the physical variables of environmental
events/objects and the sensation and perception that they elicit
