COMD 5070 final prep Exam Test Bank Fully
Solved Answers
As sound travels through air, it does so as a - ANSWER-longitudinal pressure wave
The period of a sine wave - ANSWER-is shorter for higher frequency sounds
Pressure can de defined as - ANSWER-force divided by area
Intensity can be defined as - ANSWER-power per unit area
The inverse square law means that - ANSWER-intensity decreases by a factor equal to
the square of the change in distance
Based on the equal loudness curves figure (2-18, p33), a 100 Hz tone would need to be
approximately how many dB in intensity to sound equally loud to a 1000 Hz tone at 40
dB? - ANSWER-53 dB
We can typically perceive smaller differences in the pitch of two sounds if they are -
ANSWER-two lower frequencies
The human voice as a complex tone is best described as - ANSWER-nearly periodic
A power spectrum is a type of - ANSWER-frequency domain plot
Resonance occurs when - ANSWER-the applied force is at a frequency that matches
the natural frequency of an object
which of the following is an analog signal? - ANSWER-speech sounds in air
musical tones in air
displacement of the middle ear bones
all of the above
an analog signal (e.g. from a microphone) - ANSWER-is continuous in amplitude
is continuous in time
both of the above
a table of numbers could fully represent - ANSWER-a digital signal
you cannot listen to digital sound via digital headphones - ANSWER-because the sound
is really generated by analog loudspeakers
, quantization refers to - ANSWER-the assignment of an analog value to the nearest
digital value available
an 8-bit A/D system has how many quantization levels? - ANSWER-256
The sampling theorem indicates - ANSWER-the minimum sample rate needed to
perfectly reconstruct a signal
aliasing during digital recording means that - ANSWER-a sinusoid is transformed into a
different frequency
anti-aliasing filtering - ANSWER-removes frequency components above the Nyquist
frequency
Low-pass filtering during DAC playback - ANSWER-is mandatory to eliminate the 'steps'
in the analog waveform
A typical range of variation for fundamental frequency (F0) during reading passages
would be about - ANSWER-3 semitones
It is best to compute jitter in a voice - ANSWER-during steady state phonation
In the research literature, the voice range profile (VRP) has also been called the -
ANSWER-phonogram
phonetogram
F0-SPL profile
all of the above
The shape of the typical voice range profile reveals that - ANSWER-intensity and F0
both tend (approximately) to rise together
Direct measurement of lung pressure is achieved by - ANSWER-puncturing the neck
with a needle below the vocal folds
Vocal efficiency may decline in some disorders because - ANSWER-vocal fold closure
tends to be incomplete, leading to higher flow
The s/z ratio is - ANSWER-convenient and simple, but subject to variability in
performance
In stroboscopy of the vocal folds, slow motion movement is - ANSWER-simulated by
having sequential images taken successively later across several vibratory cycles
Photoglottography - ANSWER-provides information about the relative glottal area
Solved Answers
As sound travels through air, it does so as a - ANSWER-longitudinal pressure wave
The period of a sine wave - ANSWER-is shorter for higher frequency sounds
Pressure can de defined as - ANSWER-force divided by area
Intensity can be defined as - ANSWER-power per unit area
The inverse square law means that - ANSWER-intensity decreases by a factor equal to
the square of the change in distance
Based on the equal loudness curves figure (2-18, p33), a 100 Hz tone would need to be
approximately how many dB in intensity to sound equally loud to a 1000 Hz tone at 40
dB? - ANSWER-53 dB
We can typically perceive smaller differences in the pitch of two sounds if they are -
ANSWER-two lower frequencies
The human voice as a complex tone is best described as - ANSWER-nearly periodic
A power spectrum is a type of - ANSWER-frequency domain plot
Resonance occurs when - ANSWER-the applied force is at a frequency that matches
the natural frequency of an object
which of the following is an analog signal? - ANSWER-speech sounds in air
musical tones in air
displacement of the middle ear bones
all of the above
an analog signal (e.g. from a microphone) - ANSWER-is continuous in amplitude
is continuous in time
both of the above
a table of numbers could fully represent - ANSWER-a digital signal
you cannot listen to digital sound via digital headphones - ANSWER-because the sound
is really generated by analog loudspeakers
, quantization refers to - ANSWER-the assignment of an analog value to the nearest
digital value available
an 8-bit A/D system has how many quantization levels? - ANSWER-256
The sampling theorem indicates - ANSWER-the minimum sample rate needed to
perfectly reconstruct a signal
aliasing during digital recording means that - ANSWER-a sinusoid is transformed into a
different frequency
anti-aliasing filtering - ANSWER-removes frequency components above the Nyquist
frequency
Low-pass filtering during DAC playback - ANSWER-is mandatory to eliminate the 'steps'
in the analog waveform
A typical range of variation for fundamental frequency (F0) during reading passages
would be about - ANSWER-3 semitones
It is best to compute jitter in a voice - ANSWER-during steady state phonation
In the research literature, the voice range profile (VRP) has also been called the -
ANSWER-phonogram
phonetogram
F0-SPL profile
all of the above
The shape of the typical voice range profile reveals that - ANSWER-intensity and F0
both tend (approximately) to rise together
Direct measurement of lung pressure is achieved by - ANSWER-puncturing the neck
with a needle below the vocal folds
Vocal efficiency may decline in some disorders because - ANSWER-vocal fold closure
tends to be incomplete, leading to higher flow
The s/z ratio is - ANSWER-convenient and simple, but subject to variability in
performance
In stroboscopy of the vocal folds, slow motion movement is - ANSWER-simulated by
having sequential images taken successively later across several vibratory cycles
Photoglottography - ANSWER-provides information about the relative glottal area
