COMD 5070 PRACTICE SOLUTION EXAM
2026 QUESTIONS WITH ANSWERS
GRADED A+
◉ What are the types of spectra?. Answer: line, FFT, LPC
◉ fast Fourier transform (FFT). Answer: clearly shows harmonic
energy, each peak is harmonic, less clear at showing formants, more
revealing of the source.
◉ What is a formant?. Answer: the characteristic resonances of the
vocal tract.
◉ linear prodictive codeing (LPC). Answer: shows spectral envelope,
good at revealing formants, does not show harmonics, more
revealing of filter (vocal tract)
◉ What does motor equivalence mean?. Answer: the same sound
can be produced several ways, acoustics cannot reveal all details of
movement
, ◉ empirical means:. Answer: that it is based on data
◉ deterministic means:. Answer: that it obeys physical laws (not
random)
◉ predictive means:. Answer: if you do this ... then that will happen
◉ parsimonious means:. Answer: the simplest explanation possible
is the best one
◉ what does nyquist mean:. Answer: this is half of the sample rate
(the highest frequency you can reproduce).
◉ quantization. Answer: is the process of converting a voltage,
which is analog, into a number, which is digital (it creates a number
that reflects a signal amplitude, one number is a 'snap shot' more
decimal places for more detail.
◉ sampling rate. Answer: is how often you take a snapshot, it is in
Hz, 10 samples per second = 10 Hz
◉ Why are speech acoustic measures limited in how well they
reflect specific speech movements in the vocal tract?. Answer:
acoustic patterns reflect vocal tract movements with some
2026 QUESTIONS WITH ANSWERS
GRADED A+
◉ What are the types of spectra?. Answer: line, FFT, LPC
◉ fast Fourier transform (FFT). Answer: clearly shows harmonic
energy, each peak is harmonic, less clear at showing formants, more
revealing of the source.
◉ What is a formant?. Answer: the characteristic resonances of the
vocal tract.
◉ linear prodictive codeing (LPC). Answer: shows spectral envelope,
good at revealing formants, does not show harmonics, more
revealing of filter (vocal tract)
◉ What does motor equivalence mean?. Answer: the same sound
can be produced several ways, acoustics cannot reveal all details of
movement
, ◉ empirical means:. Answer: that it is based on data
◉ deterministic means:. Answer: that it obeys physical laws (not
random)
◉ predictive means:. Answer: if you do this ... then that will happen
◉ parsimonious means:. Answer: the simplest explanation possible
is the best one
◉ what does nyquist mean:. Answer: this is half of the sample rate
(the highest frequency you can reproduce).
◉ quantization. Answer: is the process of converting a voltage,
which is analog, into a number, which is digital (it creates a number
that reflects a signal amplitude, one number is a 'snap shot' more
decimal places for more detail.
◉ sampling rate. Answer: is how often you take a snapshot, it is in
Hz, 10 samples per second = 10 Hz
◉ Why are speech acoustic measures limited in how well they
reflect specific speech movements in the vocal tract?. Answer:
acoustic patterns reflect vocal tract movements with some
