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COMD 5070 Final Exam with correct answers.
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COMD 5070 Final Exam with correct answers.
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COMD 5070 Final Exam with correctanswers
4 features of the scientific method - correct answers✔✔Empirical: based on data
Deterministic: Obeys physical laws, things are not random
Predictive
Parsimonious: Use simplest explanation but no simpler
How many semitones in an octave? - correct answers✔✔12
What is the Nyquist frequency? - correct answers✔✔Half the sample rate
The highest frequency the recording is able to reproduce
High pass filter - correct answers✔✔Allows high frequencies through
Low pass filter - correct answers✔✔Allows low frequencies through
Band pass filter - correct answers✔✔Allows a band of frequencies through - holds back higher and lower
frequencies
Band reject filter - correct answers✔✔Holds back a band of frequencies - allows high and low
frequencies through
What is the Fourier theorem? - correct answers✔✔All periodic sounds are made of a combination of
sine waves. Amplitudes, phase angles and frequencies all vary
What does a Fourier transform create? - correct answers✔✔A spectrum from the time domain
waveform
, What is the x-axis on a time-domain waveform? - correct answers✔✔Time
What is the y-axis on a time-domain waveform? - correct answers✔✔Amplitude
What is the x-axis on a frequency-domain line spectrum? - correct answers✔✔Frequency
What is the y-axis on a frequency-domain line spectrum? - correct answers✔✔Amplitude
What is the x-axis on a 3D spectrogram? - correct answers✔✔Time
What is the y-axis on a 3D spectrogram? - correct answers✔✔Frequency
What does darkness represent on a 3D spectrogram? - correct answers✔✔Intensity
What is a Fast Fourier Transform (FFT)? - correct answers✔✔Revealing of source.
Shows harmonic energy and range of harmonics in the sound.
What is Linear Predictive Coding (LPC) - correct answers✔✔Revealing of filter.
Shows spectral envelope and where the resonant frequencies are.
What does a line spectrum show? - correct answers✔✔A snapshot in time
What does a spectrogram show? - correct answers✔✔Speech over time
What is perturbation? - correct answers✔✔Rapid and random, i.e. hoarseness
What is modulation? - correct answers✔✔Rhythmic change in F0 and amplitude, i.e. vocal tremor
Tracheal puncture - correct answers✔✔Direct, accurate measure of subglottal pressure during speech
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