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COMD 5070 final prep Exam Questions with Solutions

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COMD 5070 final prep Exam Questions with Solutions

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  • August 16, 2024
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COMD 5070 final prep Exam
Questions with Solutions
As sound travels through air, it does so as a - -longitudinal pressure wave

-The period of a sine wave - -is shorter for higher frequency sounds

-Pressure can de defined as - -force divided by area

-Intensity can be defined as - -power per unit area

-The inverse square law means that - -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? - -53 dB

-We can typically perceive smaller differences in the pitch of two sounds if
they are - -two lower frequencies

-The human voice as a complex tone is best described as - -nearly periodic

-A power spectrum is a type of - -frequency domain plot

-Resonance occurs when - -the applied force is at a frequency that matches
the natural frequency of an object

-which of the following is an analog signal? - -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) - -is continuous in amplitude
is continuous in time

both of the above

-a table of numbers could fully represent - -a digital signal

-you cannot listen to digital sound via digital headphones - -because the
sound is really generated by analog loudspeakers

, -quantization refers to - -the assignment of an analog value to the nearest
digital value available

-an 8-bit A/D system has how many quantization levels? - -256

-The sampling theorem indicates - -the minimum sample rate needed to
perfectly reconstruct a signal

-aliasing during digital recording means that - -a sinusoid is transformed
into a different frequency

-anti-aliasing filtering - -removes frequency components above the Nyquist
frequency

-Low-pass filtering during DAC playback - -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 - -3 semitones

-It is best to compute jitter in a voice - -during steady state phonation

-In the research literature, the voice range profile (VRP) has also been called
the - -phonogram
phonetogram
F0-SPL profile

all of the above

-The shape of the typical voice range profile reveals that - -intensity and F0
both tend (approximately) to rise together

-Direct measurement of lung pressure is achieved by - -puncturing the neck
with a needle below the vocal folds

-Vocal efficiency may decline in some disorders because - -vocal fold
closure tends to be incomplete, leading to higher flow

-The s/z ratio is - -convenient and simple, but subject to variability in
performance

-In stroboscopy of the vocal folds, slow motion movement is - -simulated by
having sequential images taken successively later across several vibratory
cycles

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