Question

Our model of the human voice represents the vocal chords as a vibrating string that is the driver. The vocal tract is modeled as a gas filled tube and is the resonating system. This questions review how changes in the physical system affect changes in the sound produced.

When a person makes different vowel sounds, the length of their vocal tract (i.e., the length of the gas filled tube) changes. What does this alter?

A)Both the driving frequencies and the resonant wavelengths of the vocal tract change.

B)The resonant wave lengths of the vocal tract change.

C)Both the speed of sound and the driving frequencies change.

D)All three things change.

E)The speed of sound changes.

F)The driving frequencies change.

G)Both the speed of sound and the resonant wavelengths of the vocal tract change. If you breath in helium, the frequency of your voice increases because... A)The resonant wavelengths stay the same, but the speed of sound increases. B)The speed of sound is the same, but the resonant wavelengths get smaller. C)The speed of the sound increases and the resonant wavelengths get smaller. In polyphonic overtone singing, how does the singer change their voice? A)They change the resonant wavelengths of their mouth to make most of the higher resonant frequencies of the vocal chords louder than they usually are. B)They change the resonant wavelengths of their mouth to filter out most of the higher resonant frequencies of the vocal chords. C)They change the resonant frequencies of their vocal chords, which drive the vocal tract.

Answer 1

Principles of sound theory are used.