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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 parsimonious? - 🧠 ANSWER ✔✔uses
the simplest explanation possible
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 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
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