Psychoacoustics Test Questions with Correct Answers 100% Solved
Which of the following psychophysical method allows the subject to control the stimulus value? -
Answers Method of adjustment
The function relating "absolute" sensitivity as measured in the sound field to frequency is called the.... -
Answers Minimum audible field threshold function
Supra-aural headphones, such as the TDH-49's, are calibrated using a.... - Answers 6 cc coupler
You present a 1000 Hz tone through the audiometer at 70 dB HL. You are using TDH-49 headphones. If
the RETSPL threshold for 1000 Hz is 7 dB, what should be the level of this tone in dB SPL? - Answers 77
dB SPL
According to Weir, Jesteadt, and Green (1977), frequency limens... - Answers Get larger as frequency is
increased over 1000 Hz
According to signal detection theory, two different points along a receiver operating characteristic (ROC)
curve reflect.... - Answers Differences in response bias
Typically, the actual size of just-noticeable differences (jnds) will depend on the point along the stimulus
continuum where they are measured. This proportionality of the jnd is called the.... - Answers Weber
fraction
What provides an explanation for the "missing 6 dB" between minimum audible pressure and minimum
audible field measurements? - Answers Differences in calibration procedures, head diffraction, outer ear
resonances.
What statement is true regarding the effect of signal duration on obtaining the signal's detection
threshold? - Answers If the signal is > 10 ms but <300 ms, threshold reflects constant energy.
For coding frequencies above 5000 Hz, the auditory system probably relies.... - Answers Solely on place
coding frequency
What psychophysical method will change the stimulus value presented to the listener based on the
listeners' previous performance? - Answers Adaptive
A signal is > 10 ms but <300 ms in duration. If the duration of the signal is then cut in half, by how many
dB must the power of the signal be increased to maintain equal energy? - Answers 3 dB
According to the theory of signal detectability, which of the following statements is true? - Answers
Improvement in sensitivity without change in response criterion will increase hit rates and decrease
false alarm rates.
For a fixed setting of the hearing level dial of a pure-tone audiometer, which of the following is true of
the actual sound pressure level (SPL) output of the audiometer earphone? - Answers It is lowest at
midfrequencies
, In audiometric testing, a false positive response means that the... - Answers Signal was not presented
and the client responded
How do intensity discrimination results with a)wideband noise and b)tonal stimuli compare to the weber
fraction? - Answers The weber fraction is constant for wide band stimuli whereas for pure tones, it is not
constant.
__________ measure loudness via direct scaling, whereas ___________ measure loudness via matching.
- Answers Sones, phons
The 2 down-1 up rule in adaptive psychophysical methods calculates the ___________ point on the
threshold psychometric function, and the 3 down-1 up rule calculates the ___________ point. - Answers
71%, 79%
The maximum amount of hearing loss due to OHC damage alone is about ___________ dB for low
frequencies and about __________ dB for high frequencies. - Answers 50, 65
How do intensity discrimination results with a) wideband noise and b) tonal stimuli compare to the
Weber fraction? - Answers The Weber fraction is constant for wide band stimuli whereas for pure tones,
it is not constant
What is the power law and what does it mean? - Answers Results of direct scaling tend to follow a
straight line when plotted on log-log coordinates. The power law is when physical magnitudes are
translated into psychological impressions on a power scale.
What is a psychological correlate of the basilar membrane input-output function? - Answers Can explain
loudness recruitment with steeper than normal I/O basilar membrane function.
What is a physiological mechanism for the volley theory of frequency coding? - Answers A single neuron
cannot phase-lock to each cycle from 1-5 kHz so the volley theory suggests that multiple neurons are
needed to encode the frequency.
Why might listeners with SNHL have difficulty with frequency discrimination? - Answers People with
SNHL have larger difference limens for frequency discrimination. This has led to the thought that people
with SNHL have reduced phase-locking abilities so they have poorer frequency discrimination.
Do listeners with SNHL have better intensity discrimination than listeners with NH? - Answers If NH
individuals and individuals with SNHL listen to the same dB SPL then intensity discrimination is best for
NH because their basilar membranes move the same amount in both listeners when presented in dB SPL
but if they are listening in SL, their basilar membranes move differently. BM motion at SL is far less for
NH, so they do move poorly at SL then SNHL listeners at SL.
Do listeners with CI have tonotopicity? Why or why not? - Answers Yes they do because the electrodes
are placed at certain positions within the cochlea that help restore their tonotopicity to some degree.
Which of the following psychophysical method allows the subject to control the stimulus value? -
Answers Method of adjustment
The function relating "absolute" sensitivity as measured in the sound field to frequency is called the.... -
Answers Minimum audible field threshold function
Supra-aural headphones, such as the TDH-49's, are calibrated using a.... - Answers 6 cc coupler
You present a 1000 Hz tone through the audiometer at 70 dB HL. You are using TDH-49 headphones. If
the RETSPL threshold for 1000 Hz is 7 dB, what should be the level of this tone in dB SPL? - Answers 77
dB SPL
According to Weir, Jesteadt, and Green (1977), frequency limens... - Answers Get larger as frequency is
increased over 1000 Hz
According to signal detection theory, two different points along a receiver operating characteristic (ROC)
curve reflect.... - Answers Differences in response bias
Typically, the actual size of just-noticeable differences (jnds) will depend on the point along the stimulus
continuum where they are measured. This proportionality of the jnd is called the.... - Answers Weber
fraction
What provides an explanation for the "missing 6 dB" between minimum audible pressure and minimum
audible field measurements? - Answers Differences in calibration procedures, head diffraction, outer ear
resonances.
What statement is true regarding the effect of signal duration on obtaining the signal's detection
threshold? - Answers If the signal is > 10 ms but <300 ms, threshold reflects constant energy.
For coding frequencies above 5000 Hz, the auditory system probably relies.... - Answers Solely on place
coding frequency
What psychophysical method will change the stimulus value presented to the listener based on the
listeners' previous performance? - Answers Adaptive
A signal is > 10 ms but <300 ms in duration. If the duration of the signal is then cut in half, by how many
dB must the power of the signal be increased to maintain equal energy? - Answers 3 dB
According to the theory of signal detectability, which of the following statements is true? - Answers
Improvement in sensitivity without change in response criterion will increase hit rates and decrease
false alarm rates.
For a fixed setting of the hearing level dial of a pure-tone audiometer, which of the following is true of
the actual sound pressure level (SPL) output of the audiometer earphone? - Answers It is lowest at
midfrequencies
, In audiometric testing, a false positive response means that the... - Answers Signal was not presented
and the client responded
How do intensity discrimination results with a)wideband noise and b)tonal stimuli compare to the weber
fraction? - Answers The weber fraction is constant for wide band stimuli whereas for pure tones, it is not
constant.
__________ measure loudness via direct scaling, whereas ___________ measure loudness via matching.
- Answers Sones, phons
The 2 down-1 up rule in adaptive psychophysical methods calculates the ___________ point on the
threshold psychometric function, and the 3 down-1 up rule calculates the ___________ point. - Answers
71%, 79%
The maximum amount of hearing loss due to OHC damage alone is about ___________ dB for low
frequencies and about __________ dB for high frequencies. - Answers 50, 65
How do intensity discrimination results with a) wideband noise and b) tonal stimuli compare to the
Weber fraction? - Answers The Weber fraction is constant for wide band stimuli whereas for pure tones,
it is not constant
What is the power law and what does it mean? - Answers Results of direct scaling tend to follow a
straight line when plotted on log-log coordinates. The power law is when physical magnitudes are
translated into psychological impressions on a power scale.
What is a psychological correlate of the basilar membrane input-output function? - Answers Can explain
loudness recruitment with steeper than normal I/O basilar membrane function.
What is a physiological mechanism for the volley theory of frequency coding? - Answers A single neuron
cannot phase-lock to each cycle from 1-5 kHz so the volley theory suggests that multiple neurons are
needed to encode the frequency.
Why might listeners with SNHL have difficulty with frequency discrimination? - Answers People with
SNHL have larger difference limens for frequency discrimination. This has led to the thought that people
with SNHL have reduced phase-locking abilities so they have poorer frequency discrimination.
Do listeners with SNHL have better intensity discrimination than listeners with NH? - Answers If NH
individuals and individuals with SNHL listen to the same dB SPL then intensity discrimination is best for
NH because their basilar membranes move the same amount in both listeners when presented in dB SPL
but if they are listening in SL, their basilar membranes move differently. BM motion at SL is far less for
NH, so they do move poorly at SL then SNHL listeners at SL.
Do listeners with CI have tonotopicity? Why or why not? - Answers Yes they do because the electrodes
are placed at certain positions within the cochlea that help restore their tonotopicity to some degree.
