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COMD 5070- Exam 1- Quiz week 1 Solved 100% Correct
Typology: Exams
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A low pass filter: - ANSWER-Blocks high frequency A simple, low tech tool for a doctor to view a person's larynx is: - ANSWER-A laryngeal mirror A single vertical line on a line spectrum would represent: - ANSWER-A sine wave A table full of numbers could fully represent.... - ANSWER-A digital sound A typical range of variation for fundamental frequency (F0) during reading passages would be about: - ANSWER-3 Semitones Aliasing during digital recording means that.... - ANSWER-A sinusoid is transformed into a different frequency. An 8-bit A/D system has how many quantization levels? - ANSWER- An analog signal (e.g. from a microphone)... - ANSWER--is continuous in AMPLITUDE -is continuous in TIME An electroglottograph reveals details of voicing by: - ANSWER-Passing a current across the vocal folds Anti-aliasing filtering.... - ANSWER-Removes frequency components above the Nyquist frequency. As the voice increases in intensity.... - ANSWER-SQ (speed quotient) increases OQ (open quotient) decreases Direct measurement of lung pressure is achieved by: - ANSWER-Puncturing the neck with a needle below the vocal folds. In the research literature, the voice range profile (VRP) has also been called the: - ANSWER--phonogram -phonetogram -F0-SPL profile *All of the above In the stroboscopy of the vocal folds, slow motion movement is: - ANSWER-Simulated by having sequential images taken successively later across several vibratory cycles.
In vocal modulation, the frequency changes over time are: - ANSWER-Slow and rhythmic It is best to compute jitter in a voice: - ANSWER-During steady state phonation. Loudness is best measured by: - ANSWER-Having a listener make a perceptual judgement. Low pass filtering during DAC playback..... - ANSWER-Is mandatory to eliminate the "steps" in the analog waveform. On a spectrogram (not spectrum), the x and y axes represent, respectively: - ANSWER- time, frequency Photoglottography : - ANSWER-Provides information about the relative glottal area. Quantization refers to: - ANSWER-The assignment of an analog value to the nearest digital value available. The best way to avoid aliasing during a digital recording is to use a: - ANSWER-Low pass filter The s/z ratio is: - ANSWER-Convenient and simple but subject to variability in performance. (s and z phonation sustained and numbers divided. Higher number= difficulty with phonation) The sampling theorem indicates : - ANSWER-The minimum sample rate needed to perfectly reconstruct a signal. The shape of the typical voice range profile reveals that: - ANSWER-Intensity & F0 both tend (approximately) to rise together. Vocal efficiency may decline in some disorders because: - ANSWER-Vocal fold closure tends to be incomplete, leading to higher flow. We say that science is parsimnious. This means that: - ANSWER-It uses the simplest explanation possible. When a signal is converted from analog to digital form, the number of "snapshots" per second is the: - ANSWER-sampling rate Which of the following is an analog signal? - ANSWER--Speech sounds in air -Musical tones in air -Displacement of the middle ear bones *All of the above