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350: Glottal wave repeat frequency
355: Glottal waves compared
360: Vocal tract resonances
365: Recognition of a vowel
367: Speech production
370: Match word and spectrogram

 350.  What is the repeat frequency of the glottal wave shown?


a) none of the below
b) 0.008 s
c) 125 s.
d) 125 Hz
e) 100 Hz

Fundamentals of Sound reference:Sec. 8-B.

355.  The following two graphs represent glottal pressure waves.  Which
statements below are true?


a)  The shapes of individual pulses in the two glottal waves are different
b)  The speaker producing the left glottal wave has a higher pitched voice than the person producing the right glottal wave.
c)  The two glottal waves represent two different speech sounds.
d)  a and b
e)  b and c
f)  a, b and c

Fundamentals of Sound reference:Sec. 8-B.

360.  If we model the vowel "e" as in "head" by considering the vocal tract as a uniform column of air of length 0.55 ft (6.6 inches) closed at one end (the glottis) and open at the other (the lips), what is the lowest resonant frequency for this column of air?

Use 1100 ft/s as the speed of sound.

a) 100 Hz
b) 225 Hz
c) 500 Hz
d) 1000 Hz
e) none of these

Fundamentals of Sound reference:Secs. 3-D, 8-C.

365.  We recognize a particular vowel spoken by two different people (say, an adult and a child) because:

a) The vocal tract has the same shape no matter who pronounces the vowel.
b) The vocal tract filters the glottal wave so that the filtered glottal wave is the same for both people.
c) Recognition is based only on the relative sizes and positions of the formants.
d) None of the above.
e) a, b, and c
f) a and c

Fundamentals of Sound reference:Sec. 8-C.

367. Which one of the following sentences could be a correct statement? What is the mistake in each of the others?

a) "I was able to count 6 glottal pulses occurring in 30 ms on this wide-band spectrum."
b) "When I raise the fundamental frequency of my glottal wave the pitch of my voice won't change."
c) "We need a narrow-band spectrum to see the formants of this speech sound."
d) "From the first formant on this spectrogram you can see that the speaker's pitch corresponds to 125 Hz."
e) "After a throat operation some patients might need an artificial larynx to produce the formants of some speech sounds."

Fundamentals of Sound reference: Chap. 8.



370.  Match the words with the spectrogram.

Select a three-digit number to go with the spectrograms in the order that they appear using the following code:

                LOOK:  1
                STAY:  2
                SEEN:  3

a) 123
b) 321
c) 132
d) 231
e) 213
f) 312

Fundamentals of Sound reference:Chap 9.

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© William J. Mullin