COMD 5070 - Final Exam Questions With Correct Answers
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Module
COMD 5070
Institution
COMD 5070
COMD 5070 - Final Exam Questions With
Correct Answers
What is science? what are the 4 features of the scientific method? - answer-empirical
-deterministic
-predictive
-parsimonious
what does it mean for science to be empirical? - answerbased on data
what does it mean for science to be determ...
COMD 5070 - Final Exam Questions With
Correct Answers
What is science? what are the 4 features of the scientific method? - answer✔-empirical
-deterministic
-predictive
-parsimonious
what does it mean for science to be empirical? - answer✔based on data
what does it mean for science to be deterministic? - answer✔obeys physical laws
what does it mean for science to be predictive? - answer✔if you do this.... then that will happen
what does it mean for science to be parsimonious? - answer✔uses the simplest explanation
possible
how many semitones are in one octave? - answer✔12 semitones
how much sampling is enough? - answer✔sample at 2x the rate of the highest frequency (e.g.
data up to 5 kHz = sample at 10 kHz, data up to 100 Hz = sample at 200 Hz)
what is the Nyquist frequency? - answer✔half the sample rate
if you want to go up one octave, you ______ the frequency. - answer✔double
if you want to go down one octave, you ______ the frequency. - answer✔halve
what does a high pass filter do? - answer✔allows high frequencies through
what does a low pass filter do? - answer✔allows low frequencies through
what does a band pass filter do? - answer✔allows a band of frequencies through (mid)
what does a band reject filter do? - answer✔holds back/attenuates a band of frequencies (allows
high and low frequencies)
what does a Fourier transform do? - answer✔creates a spectrum from the time domain waveform
(deconstructs the waveform)
what is the cake analogy to a Fourier transform? - answer✔analyze a cake to learn its ingredients
what does a time domain display show? - answer✔-a waveform represents sound directly
-air pressure changes over time
what does a frequency domain display show? - answer✔a line spectrum shows the frequency
components of a periodic sound
what is a FFT spectrum? - answer✔fast Fourier transform
-shows harmonic energy
-each peak is a harmonic
-less clear at showing formants
what is FFT reveal more of? - answer✔vocal SOURCE
what is a LPC spectrum? - answer✔linear predictive coding
-shows spectral envelope (doesn't show individual harmonics)
-good at revealing formants
what does a LPC spectrum reveal more of? - answer✔vocal tract FILTER
on a spectrum, a sine wave appears as ___________. - answer✔a single line
a line spectrum is a _______ in time. - answer✔snapshot
what is the x-axis in a speech spectrogram? - answer✔X = TIME
what is the y-axis in a speech spectrogram? - answer✔Y = FREQUENCY
what does the darkness in a speech spectrogram represent? - answer✔darkness = INTENSITY
what is the difference between perturbation and modulation? - answer✔modulation is much
slower than random cycle-to-cycle perturbation; modulation is spread across many cycles
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