SHS 311 Final Exam Questions and Answers 100% Correct
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Course
SHS 311
Institution
SHS 311
SHS 311 Final Exam Questions and Answers 100% Correct
What is loudness recruitment? - Answer- -Phenomenon that happens to non-hearing listeners, low intensity level
-Caused by loss of outer hair cells
For a person with hearing loss, low intensity sounds are () to detect while high intensity ...
SHS 311 Final Exam Questions
and Answers 100% Correct
What is loudness recruitment? - Answer- -Phenomenon that happens to non-hearing
listeners, low intensity level
-Caused by loss of outer hair cells
For a person with hearing loss, low intensity sounds are () to detect while high intensity
sounds are () - Answer- more difficult
just as loud as for a person with normal hearing
What are the two neural mechanisms that may be used to determine the pitch of a pure
tone? In what frequency ranges do they work (low or high frequencies)? - Answer-
•Place- which group of neurons have highest response of firing
•Temporal
•Only works for low frequencies under 5000 Hz
•Low frequency- one cue (place)
pitch - Answer- the perceptual property of sounds that allows their ordering from low to
high on a frequency-based scale
-fundamental for music perception (melodies) and speech perception (prosodies, voice
characteristics, lexical tones)
mel scale - Answer- scaling for pitch, is measured in a similar way as the sone scale for
loudness perception
-above 500 Hz, 4 octaves in Hz lead to 2 octaves in mels
mels (y axis) hertz (x axis)
Pitch and frequency - Answer- -for a pure tone, pitch is closely related to frequency; a
frequency increase shifts energy to a higher spectral region and decreases the period of
the time waveform
spectral and temporal properties of frequency at high frequencies - Answer- only the
place cues (which fibers discharge) may be used to perceive pitch, because temporal
cues degrade at high frequencies due to the limitation of phase locking
spectral and temporal properties of frequency at low frequencies - Answer- the period of
neural firing (temporal cues) or which fibers discharge (place cues) may be the basis for
pitch perception
, Pitch may be due to a change in () and/or a change in the () of sound waveform -
Answer- spectrum
period
pitch matching - Answer- the complex sound serves as the standard sound
pure tone with clearly defined pitch at its frequency is used as the comparison sound for
pitch matching
the frequency of the comparison pure tone is varied until the comparison pure tone is
perceived to have the same pitch as the complex sound
what is the missing fundamental pitch - Answer- 1. physical presence of the
fundamental frequency is not critical for pitch perception of a complex sound. The pitch
of a harmonic complex sound is that of the fundamental frequency even when the
fundamental frequency and other lower harmonics are removed from the stimulus
SHIFT OF THE RESIDUE PITCH - Answer- the pitch of a complex sound is not
determined by the constant spacing between spectral components
ITERATED RIPPLE NOISE PITCH - Answer- the periodicity of a temporal envelope is
also not required for pitch perception of a complex sound
the theories that do the best job of explaining the pitch data are those based on the () of
a sound/ what does this suggest - Answer- temporal fine structure
pitch perception may be due to the ability of neurons to fire in synchrony to the fine-
structure changes in the sound waveform
What are the acoustic cues used for sound segregation and grouping? - Answer- -
Segregation- separating cues (spatial separation, spectral separation, temporal
separation)
-Integration- group together is consistent pattern; harmonics (harmonic relationship,
temporal continuity, temporal modulations)
auditory scene analysis - Answer- our auditory system needs to organize sound into
meaningful streams when sound from multiple sources reach the ear drum at the same
time
-segmentation
-segregation
-integration
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
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