COMD 5070 1.3 Already Rated A
Spectrogram and Spectrum Axes - Spectrogram Axes:
️ X-axis: Time
️ Y-axis: Frequency - Spectrum Axes:
️ X-axis: Frequency
️ Y-axis: Amplitude
Spectrum Representation - Single Vertical Line on a Line Spectrum:
️ Represents a sine wave. - ...
COMD 5070 1.3 Already Rated A
Spectrogram and Spectrum Axes
- Spectrogram Axes:
✔️ X-axis: Time
✔️ Y-axis: Frequency
- Spectrum Axes:
✔️ X-axis: Frequency
✔️ Y-axis: Amplitude
Spectrum Representation
- Single Vertical Line on a Line Spectrum:
✔️ Represents a sine wave.
- Multiple Vertical Lines:
✔️ Represents a harmonic series.
Filters
- Low Pass Filter:
✔️ Blocks high frequencies.
- Allows low frequencies to pass through.
- Low Frequencies Pass Through:
✔️ Achieved with a low pass filter.
Scientific Principles
- Parsimonious Science:
✔️ Means it uses the simplest explanation possible.
, Measurement of Loudness
- Loudness Best Measured By:
✔️ Having a listener make a perceptual judgment.
Analog to Digital Signal Conversion
- Sampling Rate:
✔️ The number of "snapshots" taken of a signal per second during conversion from analog to digital
form.
Tools and Technology
- Laryngeal Mirror:
✔️ A simple, low-tech tool for a doctor to view a person's larynx.
Vocal Modulation
- Vocal Modulation Frequency Changes:
✔️ Are slow and rhythmic.
Electroglottography
- Electroglottograph Function:
✔️ Reveals details of voicing by passing a current across the vocal folds.
Preventing Aliasing
- Best Way to Avoid Aliasing During Recording:
✔️ Use a low pass filter.
Sound Propagation
- Sound in Air:
✔️ Travels as a longitudinal pressure wave.
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