ComD 5070 Exam 1 Study Guide
modules 1-5
• SLPs' use of technology [why do we use it clinically? how can acoustics help?] - correct
answer-- OVERCOME LISTENER BIAS. Consistent, reliable measurement is provided by
analysis.
- Use OBJECTIVE TERMS AND MEASURES TO DESCRIBE THE SEVERITY of a disorder
objectively. We can standardize our measurements of speech since we have objective
criteria to measure each patient against.
- TRACK PROGRESS over time, and DEMONSTRATE TREATMENT EFFICIENCY.
- EBP (Evidence Based Practice). We measure the client's performance before and after
therapy in order to objectively prove that the treatment was effective.
- PROVIDE BIOFEEDBACK to the client. Show the person what they are doing on a
computer display in real time, and can help them change behavior.
• what is science?4 features of the scientific method - correct answer-1) EMPIRICAL - based
on data
2) DETERMINISTIC - obeys physical laws
3) PREDICTIVE - if you this....then that will happen
4) PARSIMONIOUS - use the simplest explanation poss.
A filter that allows a band of frequencies through and holds back both high and lower
frequencies is called a? - correct answer-Band pass filter
A filter that holds back a band of frequencies and allows both high and low frequencies
through is called a? - correct answer-Band reject filter
A low pass filter...... - correct answer-- BLOCKS HIGH FREQUENCIES
A power spectrum is a type of - correct answer-frequency domain plot
A simple, low tech tool for a doctor to view a person's larynx is - correct answer-a
LARYNGEAL MIRROR
A single vertical line on a line spectrum would represent - correct answer-a SINE WAVE
a table of numbers could fully represent - correct answer-A DIGITAL SIGNAL
A typical range of variation for fundamental frequency (F0) during reading passages would
be about - correct answer-3 SEMITONES
aliasing during digital recording means that - correct answer-a sinusoid is transformed into a
different frequency
an 8-bit A/D system has how many quantization levels? - correct answer-256
, an analog signal (e.g. from a microphone)
is continuous in amplitude
is continuous in time - correct answer-BOTH OF THE ABOVE
An electroglottograph reveals details of voicing by - correct answer-passing a current across
the vocal folds
Another term for the missing fundamental is? - correct answer-RESIDUE PITCH
anti-aliasing filtering - correct answer-removes frequency components above the Nyquist
frequency
As sound travels through air, it does so as a - correct answer-LONGITUDINAL WAVE
As the voice increases in intensity - correct answer-SQ increases and OQ decreases
Based on the equal loudness curves figure (2-18, p33), a 100 Hz tone would need to be
approximately how many dB in intensity to sound equally loud to a 1000 Hz tone at 40 dB? -
correct answer-53 DB
Choosing a sample rate involves choosing what? - correct answer--Nyquist Frequency"
a) Equal to HALF of the SAMPLE RATE.
b) Represents the HIGHEST FREQUENCY THAT YOUR RECORDING CAN ACCURATELY
REPRODUCE when played back.
Define loudness? What is it affected by? - correct answer-Loudness is a PERCEPTUAL
CHARACTERISTIC of sound
- CanNOT BE MEASURED by equipment
- JUDGED BY LISTENER; it's a human response
- DURATION AFFECTS PERCEPTION of loudness
1. The LONGER the sound, the more the ear integrates the energy and the MORE AUDIBLE
it becomes
- Individual responses vary slightly regarding loudness because it is SUBJECTIVE
1. There is no way to objectively measure loudness of sound
Describe how high speed film works. - correct answer-The high speed film runs at 30 frames
per second. Still pictures are played in rapid succession and viewed in one second. It works
due to "flicker fusion rate" and presents film in a continuously smooth movement. Slower
than 30 frames would cause jerkiness. Using high speed film is not clinically practical
because it's too expense and complex to use.
Describe what happens to the vocal cords and articulators under subglottal pressure? -
correct answer-i. Causes VFs to MOVE FUTHER APART as they oscillate and results
MORE FORCEFUL COLLISIONS of VFs.
ii. ARTICculators (tongue, lips, and jaw) make BIGGER MOVEMENT when you are speaking
loudly than when you are speaking softly.
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