COMD 5070 - Final Exam Questions With Correct Answers
4 views 0 purchase
Course
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
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller sirjoel. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
