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Exam (elaborations)

COMD 5070 Questions and Answers

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  • COMD 5070
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  • COMD 5070

On a spectrum, a sine wave appears as ___________. - a single line A line spectrum is a _______ in time. - snapshot What is the x-axis in a speech spectrogram? - X = time What is the y-axis in a speech spectrogram? - Y = frequency What does the darkness in a speech spectrogram repre...

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  • September 16, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • COMD 5070
  • COMD 5070
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kharowl
COMD 5070 Questions and Answers
On a spectrum, a sine wave appears as ___________. - ✅✅ a single line

A line spectrum is a _______ in time. - ✅✅ snapshot

What is the x-axis in a speech spectrogram? - ✅✅ X = time

What is the y-axis in a speech spectrogram? - ✅✅ Y = frequency

What does the darkness in a speech spectrogram represent? - ✅✅ darkness =
intensity

What is the difference between perturbation and modulation? - ✅✅ modulation
is much slower than random cycle-to-cycle perturbation; modulation is spread
across many cycles

What is jitter? - ✅✅ frequency perturbation

What is shimmer? - ✅✅ amplitude perturbation

What is tremor? - ✅✅ rhythmic change in fundamental frequency and amplitude

Hoarse voices have (high/low) perturbation. - ✅✅ higher

What does tremor sound like? - ✅✅ shakiness in the voice without roughness or
hoarseness

What does low modulation/high perturbation sound like? - ✅✅ rough but not
wobbly.... Sounds like Kermit

What does high modulation/low perturbation sound like? - ✅✅ aka vocal
vibratto
-opera singer

What are two direct ways to measure subglottal pressure? - ✅✅ -tracheal
puncture
-esophageal pressure (swallow sensor)

, How can you estimate subglottal pressure? - ✅✅ produce voiceless bilabial
plosive (pah, pah, pah)
-this is when oral pressure equals subglottal pressure

How do you calculate average air flow? - ✅✅ dividing volume used by time
-for example, if 1 liter of air is used and phonation lasts for 5 seconds
-average flow = 1/5 liters per second = 0.2 L/s

Pressure = ______ times _______ - ✅✅ resistance x flow

Resistance = ______ divided by ______ - ✅✅ pressure / flow

How does Ohm's law relate to the voice (equation)? - ✅✅ laryngeal airway
resistance = subglottic pressure / air flow

What is science? What are the 4 features of the scientific method? - ✅✅ -
empirical
-deterministic
-predictive
-parsimonious

What does it mean for science to be empirical? - ✅✅ based on data

What does it mean for science to be deterministic? - ✅✅ obeys physical laws

What does it mean for science to be predictive? - ✅✅ if you do this then that will
happen

What does it mean for science to be parsimonious? - ✅✅ uses the simplest
explanation possible

How many semitones are in one octave? - ✅✅ 12 semitones

How much sampling is enough? - ✅✅ 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? - ✅✅ half the sample rate

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