Section 15.1
Properties and Detection of Sound
Practice Test
1.
The __________ of sound waves measures loudness.
a.
period
b.
frequency
c.
amplitude
d.
speed
Hint
2.
The speed of sound in air changes depending on __________.
a.
pressure
b.
wind
c.
temperature
d.
volume
Hint
3.
What is the logarithmic scale that measures sound level?
a.
frequency
b.
pressure
c.
decibel
d.
electromagnetic spectrum
Hint
4.
Sound cannot travel through __________.
a.
gas
b.
steel
c.
water
d.
a vacuum
Hint
5.
The frequency of a sound determines its __________.
a.
timbre
b.
speed
c.
pitch
d.
loudness
Hint
6.
Decibels measure changes in __________.
a.
pressure
b.
temperature
c.
frequency
d.
wavelength
Hint
7.
When a train passes and its whistle sounds like it changes pitch, the cause is __________.
a.
the Galileo Effect
b.
the Big Bang
c.
speed change
d.
the Doppler Effect
Hint
8.
What is a sound wave?
a.
fluctuations in electromagnetic energy
b.
a radio wave
c.
a pressure variation transmitted through matter
d.
a surface wave
Hint
9.
What type of wave is sound?
a.
transverse
b.
surface
c.
electromagnetic
d.
compressional
Hint
10.
Long-term exposure to loud sounds can __________.
a.
increase low-frequency hearing
b.
decrease high-frequency hearing
c.
decrease low-frequency hearing
d.
increase high-frequency hearing
Hint
11.
During the Doppler shift, approaching sound waves __________.
a.
gain amplitude
b.
shorten
c.
lengthen
d.
decrease frequency
Hint
12.
Sound waves, like other waves, __________.
a.
diffuse upon striking a hard surface
b.
refract through a hard surface
c.
are absorbed by a hard surface
d.
reflect off a hard surface
Hint
