Chapter 15:
Sound
Practice Test
1.
Long-term exposure to loud sounds can __________.
a.
decrease high-frequency hearing
b.
decrease low-frequency hearing
c.
increase low-frequency hearing
d.
increase high-frequency hearing
Hint
2.
The frequency of a sound determines its __________.
a.
timbre
b.
loudness
c.
pitch
d.
speed
Hint
3.
The speed of sound in air changes depending on __________.
a.
temperature
b.
pressure
c.
volume
d.
wind
Hint
4.
Sound waves, like other waves, __________.
a.
diffuse upon striking a hard surface
b.
reflect off a hard surface
c.
are absorbed by a hard surface
d.
refract through a hard surface
Hint
5.
The __________ of sound waves measures loudness.
a.
amplitude
b.
speed
c.
period
d.
frequency
Hint
6.
What type of wave is sound?
a.
transverse
b.
compressional
c.
electromagnetic
d.
surface
Hint
7.
Decibels measure changes in __________.
a.
temperature
b.
pressure
c.
wavelength
d.
frequency
Hint
8.
The sound from a trumpet results from __________.
a.
vibrating lips
b.
vibrating reeds
c.
vibrating brass
d.
vibrating strings
Hint
9.
The lowest frequency in a sound wave is called the __________.
a.
fundamental
b.
trough
c.
crest
d.
amplitude
Hint
10.
What causes "beat notes" in music?
a.
waves with nearly identical frequencies interfering with each other
b.
musical notes that are in consonance with each other
c.
notes that are at least an octave apart
d.
harmonics interfering with their fundamentals
Hint
