Sound

Question 1

sound is a name for:

Answer 1

pressure changes in the air

Question 2

sound waves travel much __ than light

Answer 2

sound waves travel much slower than light (electromagnetic waves)

Question 3

in air, sound travels at :

Answer 3

~340 m/s

Question 4

in water sound travels faster, at

Answer 4

~ 1500 m/s

Question 5

the amplitude or intensity of a sound wave is the difference between

Answer 5

the highest and lowest level of the oscillation

Question 6

the intensity of sound is often measured in

Answer 6

dB SPL = 20 log (p/p0)

Question 7

we perceive the intensity of sound as

Answer 7

loudness

Question 8

prolonged exposure to intense sound can cause:

Answer 8

irreversible hearing loss

Question 9

the frequency of a sound wave is

Answer 9

the number of cycles per second

Question 10

the frequency of a sound wave is the number of cycles per second, measured in

Answer 10

hertz (Hz)

Question 11

we perceive frequency as

Answer 11

the pitch of sound

Question 12

a pure tone is a

Answer 12

sinoisoidal (sine) wave

Question 13

humans can hear a limited range of possible sounds:

Answer 13

o from 20 Hz to 20 kHz (20,000 hz)
o from -5 dB to 130 dB

Question 14

pure tones are rare outside of

Answer 14

electronic notifications

Question 15

most sounds are

Answer 15

complex sounds

Question 16

we can represent complex waveforms as

Answer 16

sum of multiple pure tones (sine waves)

Question 17

Fourier analysis

Answer 17

we can represent complex waveforms as the sum of multiple pure tones (sine waves)