Sound
Practice Test
1.
The speed of sound in air changes depending on __________.
a.
volume
b.
temperature
c.
pressure
d.
wind
Hint
2.
Long-term exposure to loud sounds can __________.
a.
increase high-frequency hearing
b.
decrease low-frequency hearing
c.
increase low-frequency hearing
d.
decrease high-frequency hearing
Hint
3.
If in Figure 15-12 the rightmost picture shows resonance for 325 Hz, what is the next highest frequency at which resonance will occur?
a.
390 Hz
b.
365 Hz
c.
406 Hz
d.
455 Hz
Hint
4.
The sound from a string instrument, like a guitar, results from __________.
a.
vibrating brass
b.
vibrating lips
c.
vibrating reeds
d.
vibrating strings
Hint
