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COMD 5070 final prep Exam Questions with Solutions
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COMD 5070 final prep ExamQuestions 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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