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COMD 5070 Exam 1-Questions with Correct Answers/ Verified/ latest Version (2024/2025)
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COMD 5070 Exam 1-Questions with Correct Answers/ Verified/ latest Version (2024/2025)
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COMD 5070 Exam 1-Questions with Correct Answers/ Verified/latest Version (2024/2025)
4 Features of the scientific method - ✔✔1. Empirical - based on data 2. Deterministic - obeys
physical laws (not random) 3. Predictive - if you do this ... then that will happen 4.
Parsimonious - use the simplest explanation possible
Why do SLP's use technology? - ✔✔1. overcome listener bias 2. consistent, reliable measure
3. describe severity objectively 4. track progress 5. ASHA's focus on EBP 6. provide
biofeedback to client 7. SLP need to know normal and disordered physiology 8. Need to
know what the numbers represent
Pitch perception - ✔✔order on a musical scale, subjective perception, can NOT be measured
with instruments, listener matches perceived pitch to that of a pure tone.
Loudness perception - ✔✔a perceptual characteristic judged by a listener, can NOT be
measured by equipment, psychophysical scale links loudness to intensity
Intensity - ✔✔is measured in dB and intensity = amplitude
IL - ✔✔Intensity Level
SPL - ✔✔Sound Pressure Level
HL - ✔✔Hearing Level
Loudness is measured with - ✔✔a sound level meter (NO SUCH THING AS A LOUDNESS
METER)
difference limens (DLs) - ✔✔smallest detectable change in frequency, DLs increase with
stimulus frequency, as intensity decreases DLs become larger
, How many semitones are in one octave? - ✔✔12
Octave - ✔✔is the doubling or the halving of frequency (400Hz base, 800 Hz an octave up,
200 Hz is an octave down)
How many semitones are in two octaves? - ✔✔24
voice range profile (VRP) - ✔✔is computed using 10 frequencies. For each frequency the
speaker produces a soft sound and a loud sound. The results are then plotted on a chart.
root mean square (RMS) - ✔✔1. squaring makes all of the values positive 2. Get the average
of the squared values 3. Get the square root of the average
Inverse Square Law - ✔✔Intensity diminishes in proportion to the square of the distance
from the source.
Relationship of subglottic pressure to speech intensity - ✔✔subglottic pressure drives
speech - louder speech, more driving pressure for loud speech
What is a digital signal? - ✔✔1. discrete in time and amplitude 2. numbers represent
snapshots over time 3. numbers have a finite precision 4. there are 'unknowns' between the
points
What is an analog signal? - ✔✔are continuous in time and amplitude, there are NO gaps,
Infinite number of points in time, infinite number of amplitude values possible, CANNOT be
fully represented by a table of numbers
What frequency should you save at for a recording? - ✔✔sample at twice the rate of the
highest frequency in the signal, data up to 100 Hz should be sampled at 200 Hz
What is Nyquist? - ✔✔is half the sample rate (the highest frequency you can reproduce)
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