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Speech and Voice Science Exam, Exams of Health sciences

An exam or test for a course on speech and voice science (comd 5070). It covers a wide range of topics related to speech production, acoustic analysis, and signal processing. The exam includes multiple-choice and short-answer questions that assess the student's understanding of concepts such as intensity, transducers, filters, vocal fold movement, sampling rate, analog-to-digital conversion, and various types of acoustic analysis techniques like spectrograms and lpc. Complete solutions to the exam questions, making it a valuable resource for students studying speech and voice science. The comprehensive coverage of topics and the detailed explanations make this document potentially useful as study notes, lecture notes, or a summary for students preparing for exams or assignments in this field.

Typology: Exams

2023/2024

Available from 08/27/2024

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Speech and Voice Science COMD 5070
Unit 1 Exam with Complete Solutions
_______ is a measure of amplitude. - ANSWER-Intensity
A _______ converts electrical energy into acoustic energy. - ANSWER-transducer
A change in movement of the articulators causes a change in the sound's: - ANSWER-
filter
A disordered voice indicates: - ANSWER-disordered vocal fold movement
A Fixed Band Pass filter looks at: - ANSWER-a series of band pass filters, one at a time
A higher sampling rate gives better: - ANSWER-fidelity
Acoustic analysis doesn't reflect the movements that caused the sound in a
____________________ way. - ANSWER-linear
Acoustic power is measured in _______. - ANSWER-watts and describes how energy is
radiated
Acoustic power represents: - ANSWER-the amount of energy transfer in a given amount
of time
Be sure not to clip the signal by: - ANSWER-bringing it in at too high a level
Changes in vocal fold movement cause a change in the sound's: - ANSWER-source
Distorted or imprecise articulation indicates: - ANSWER-abnormal movement of the
articulators
Driving the signal too hard can cause ______________ which causes _____________.
- ANSWER-clipping, noise
From looking at a spectrogram, you can get a _____________ idea of what's going on
in the voice -kind of like looking at an ______________. - ANSWER-qualitative, X-ray
Going from a CD to the speakers is an example of ______________ conversion. -
ANSWER-digital to analog (DAC)
Going from a microphone to a computer is an example of ____________________
conversion. - ANSWER-analog to digital (ADC)
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Speech and Voice Science COMD 5070

Unit 1 Exam with Complete Solutions

_______ is a measure of amplitude. - ANSWER-Intensity A _______ converts electrical energy into acoustic energy. - ANSWER-transducer A change in movement of the articulators causes a change in the sound's: - ANSWER- filter A disordered voice indicates: - ANSWER-disordered vocal fold movement A Fixed Band Pass filter looks at: - ANSWER-a series of band pass filters, one at a time A higher sampling rate gives better: - ANSWER-fidelity Acoustic analysis doesn't reflect the movements that caused the sound in a ____________________ way. - ANSWER-linear Acoustic power is measured in _______. - ANSWER-watts and describes how energy is radiated Acoustic power represents: - ANSWER-the amount of energy transfer in a given amount of time Be sure not to clip the signal by: - ANSWER-bringing it in at too high a level Changes in vocal fold movement cause a change in the sound's: - ANSWER-source Distorted or imprecise articulation indicates: - ANSWER-abnormal movement of the articulators Driving the signal too hard can cause ______________ which causes _____________.

  • ANSWER-clipping, noise From looking at a spectrogram, you can get a _____________ idea of what's going on in the voice -kind of like looking at an ______________. - ANSWER-qualitative, X-ray Going from a CD to the speakers is an example of ______________ conversion. - ANSWER-digital to analog (DAC) Going from a microphone to a computer is an example of ____________________ conversion. - ANSWER-analog to digital (ADC)

How can make your recording environment more quiet? - ANSWER-Reduce reverberation & echoing from hard surfaces in the room If the original sample contains many rapid changes, your sample rate must be ________ in order to capture those changes. - ANSWER-higher If the signal is too tiny, it won't be audible over: - ANSWER-background noise If the strength of the signal coming in is bigger than your recording device can accommodate, the signal will be: - ANSWER-badly distorted If you want to understand the impact of having hearing loss in a certain range, you could filter out _______________ _______________ in a sample of normal speech. - ANSWER-certain frequencies In a ____________________ filter , you would be deleting a number of frequencies that would be important for speech perception. - ANSWER-wide band Microphones and speakers are ____________ devices. - ANSWER-analog Name 2 benfits of acoustic analysis: - ANSWER-1. it's noninvasive

  1. from the changes in the signal we can draw inferences about the movements that generated the sound Nyquist frequency - ANSWER-half the sample rate On a digital recording device, the highest quality setting gives you the ____________ amount of time to record. - ANSWER-shortest PC sound cards belong to which type of conversion? - ANSWER-both ADC and DAC Root Mean Square (RMS) represents: - ANSWER-the amplitude of a signal Sound is an _______________ function. - ANSWER-analog The ______ _______ law has important implications for measuring SOUND PRESSURE LEVEL IN DECIBELS because the distance of our measuring device from the speaker makes and enormous difference. - ANSWER-inverse square The ____________ spectrum reveals features of the vocal tract transfer function. - ANSWER-LPC The acoustic patterns reflect the vocal tract movements with some ambiguity, because of : - ANSWER-motor equivalence (several ways to make acoustically similar speech sounds)
  1. adjust the distance between the microphone and the subject Watts represents: - ANSWER-the amount of energy that can be transferred by the system We have a _______ perception of pitch. - ANSWER-non-linear What are 3 disadvantages of a higher sample rate requiring bigger files? - ANSWER-1. more memory usage
  2. more disk space for storage
  3. more processing time for computation What are 4 filter types? - ANSWER-High pass, low pass, band pass, band reject What are 4 things you must have to obtain a good recording: - ANSWER-1. a quiet recording environment
  4. use a quality microphone
  5. good signal strength
  6. proper sample rate What are three principles of sound: - ANSWER-1. all sounds originate with movement
  7. the movement characteristics determine the nature of the sound
  8. speech production has many degrees of freedom What is a main reason to use a band pass filter? - ANSWER-To show each frequency and its energy. What is a main reason to use a band reject filter? - ANSWER-to remove unwanted noise What is spectral slope? - ANSWER-The amplitude of the harmonics resulting from vocal fold vibration falls off by 12 dB per octave. This means that each time the frequency doubles, the amplitude of the harmonics decreases by 12 dB. This is called the spectral slope (or tilt or roll-off) in the source spectrum. When you go up one octave with the musical instrument of voice, you have _______ the frequency. - ANSWER-doubled Which filter allows a middle band of frequencies through and holds back both higher and lower frequencies? - ANSWER-band pass Which filter holds back a middle band of frequencies and allows both higher and lower frequencies through? - ANSWER-band reject Which type of band reject filter, wide or narrow, would least impact the quality of the speech sample? - ANSWER-narrow band

Which type of spectrogram shows horizontal lines that represent HARMONICS of the voice and has good FREQUENCY resolution? - ANSWER-narrow band Which type of spectrogram shows individual vertical glottal pulses (vertical striations) and has good TIME resolution? - ANSWER-wide band Women's voices are about ____________________ in their fundamental frequency than men's are. - ANSWER-an octave higher You can always downsample later, but you can never : - ANSWER-upsample and replace info that wasn't in your recording. You will sample at twice the rate of the ____________ _______________ in the signal.

  • ANSWER-highest frequency