Week 3: Theory of Speech Production Flashcards
Speech consists of:
a) periodic signals only
b) aperiodic signals only
c) a mixture of signals differing only in frequency
d) a mixture of signals differing in amplitude and frequency
e) a mixture of signals differing only in amplitude
d) a mixture of signals differing in amplitude and frequency
If the period of a signal increases, the frequency will increase. True or False?
False.
Period and frequency are in an inverse relationship. A longer period corresponds to a lower frequency, and vice-versa.
A fundamental frequency of a signal that repeats every 1ms is:
a) 0.1 Hz
b) 1 Hz
c) 10 Hz
d) 100 Hz
e) 1 kHz
f) 10 kHz
e) 1 kHz
There are 1000ms in 1s. A signal that repeats 1000 times/sec has a fundamental frequency of 1000 Hz, or 1 kHz.
A spectrogram shows:
a) change in relative strengths of different frequencies over time
b) amplitude and frequency
c) change in relative strengths of the same frequency over time
d) different frequencies at one time point
a) change in relative strengths of different frequencies over time.
The glottal speech sound is a simple signal. True or False?
False.
The glottal source is a complex sawtooth waveform characterised y a rich mix or frequencies designed to excite the vocal tract across the spectrum.
As frequency increases, period will decrease. True or False?
True. Frequency and period are in an inverse relationship.
A spectral slice shows:
a) change in relative strengths of different frequencies over time
b) change in sound pressure level over time
c) position of air molecules at each point in time.
d) relative strengths of different frequencies at a single point in time.
e) change in phase over time
d) relative strengths of different frequencies at a single point in time
The primary noise source in speech production is generated by…
a) Perceptual analysis
b) Phonation
c) Respiration
d) Egression
b) Phonation
In voiced speech production, the sound source and filter and largely independent. True or False?
True.
The glottal source and the super laryngeal filter can both bee modified without affecting the other.
The characteristic frequency of a resonant chamber is primarily determined by its:
a) Width
b) Height
c) Length
d) Depth
e) Girth
c) Length
The glottal noise source is characterised by a single frequency only. True or False?
False.
The glottal noise source is a harmonically rich signal capable of exciting the vocal tract over the whole spectrum.
Positions of maximum pressure in a standing wave are fixed in space. True or False?
True.
Pressure antinodes do not move in a standing wave.
A speech signal with a fundamental frequency of 195Hz is most likely produced by A) An adult male B) A teenager C) A baby D) An adult female E) An elderly female F) An elderly male
D) An adult female
F0 typically = 200Hz for adult female speakers
In a resonating tube closed at one end, pressure is maximal at the open end of the tube. True or False?
False.
Maximum pressure occurs at the closed end of the tube (and at any other pressure antinodes)
A formant is a characteristic frequency of the speech source. True or False?
False.
A formant is a resonant frequency of the supra-laryngeal vocal tract: the ‘filter’, not the sound source.
