Chapter 2

Question 1

When molecules in a sound wave are close together, they are in the ____ phase.

a) Compression
b) Rarefaction
c) Transverse
d) Sinusoidal

Answer 1

c

Question 2

What is the term for the rapid and random movement of air particles?

a) Elasticity
b) Brownian motion
c) Resonance
d) Rarefaction

Answer 2

b

Question 3

The frequency of a wave is measured in:

a) Decibels
b) Pascals
c) Hertz
d) Newtons

Answer 3

c

Question 4

As the length of a wave increases, its frequency:

a) Increases
b) Decreases
c) Stays the same
d) Doubles

Answer 4

b

Question 5

The natural rate of vibration of a mass is called:

a) Frequency
b) Wavelength
c) Resonant frequency
d) Pitch

Answer 5

c

Question 6

Sound travels faster through a ____ than through a liquid or gas.

a) Solid
b) Vacuum
c) Plasma
d) None of the above

Answer 6

a

Question 7

The speed with which a sound wave travels is known as:

a) Frequency
b) Wavelength
c) Sound velocity
d) Intensity

Answer 7

c

Question 8

When the frequency of a sound increases, the wavelength:

a) Increases
b) Decreases
c) Remains constant
d) Doubles

Answer 8

b

Question 9

When two tones of almost identical frequency are presented, the changes in amplitude are perceived as:

a) Harmonics
b) Beats
c) Resonance
d) Masking

Answer 9

b

Question 10

A complex wave can be analyzed in terms of its ____ components.

a) Transverse
b) Sinusoidal
c) Longitudinal
d) Resonant

Answer 10

b

Question 11

In a periodic complex sound, all frequencies are ____ multiples of the fundamental frequency.

a) Fractional
b) Decimal
c) Whole-number
d) Half-number

Answer 11

c

Question 12

The intensity of a sound wave is the amount of ____ per unit of area.

a) Pressure
b) Force
c) Power
d) Velocity

Answer 12

b

Question 13

As the force increases, the ____ also increases.

a) Wavelength
b) Frequency
c) Pressure
d) Velocity

Answer 13

c

Question 14

The opposition a medium offers to the transmission of acoustic energy is called:

a) Resonance
b) Impedance
c) Frequency
d) Amplitude

Answer 14

b

Question 15

The unit of measurement of intensity used in acoustics and audiometers is the:

a) Pascal
b) Hertz
c) Decibel
d) Newton

Answer 15

c

Question 16

The decibel involves a ratio and utilizes a:

a) Polynomial
b) Exponential
c) Logarithm
d) Sine wave

Answer 16

c

Question 17

When the intensity of a wave is doubled, the number of decibels is increased by:

a) 2
b) 3
c) 4
d) 5

Answer 17

b

Question 18

Most audiometers range from about ____ dB HL to 110 dB HL.

a) 0
b) 10
c) 20
d) 30

Answer 18

a

Question 19

The ability to tell the direction from which sound comes without seeing the source is called:

a) Localization
b) Masking
c) Interference
d) Resonance

Answer 19

a

Question 20

When two sounds are heard simultaneously, the intensity of one sound may make the other inaudible. This phenomenon is called:

a) Interference
b) Beats
c) Masking
d) Echo

Answer 20

c

Question 21

The diagnostic audiometer measures hearing sensitivity through:

a) Bone conduction pure-tone audiometry
b) Air conduction pure-tone audiometry
c) Speech Audiometry
d) All of the above

Answer 21

d

Question 22

Sound level meters are used to monitor noise exposure levels in:

a) Schools
b) Industry
c) Hospitals
d) Homes

Answer 22

b

Question 23

When the sound-pressure values are doubled, the number of decibels is increased by:

a) 2
b) 4
c) 6
d) 8

Answer 23

c

Question 24

The term used to describe the subjective impression of the “highness” or “lowness” of a sound is:

a) Loudness
b) Frequency
c) Intensity
d) Pitch

Answer 24

d

Question 25

As the density of an object increases, the impedance:

a) Decreases
b) Increases
c) Remains the same
d) Doubles

Answer 25

b

Question 26

What is the lowest sound intensity to stimulate normal hearing called?

a) Threshold
b) Audiometric zero
c) Sensation level
d) Localization

Answer 26

b

Question 27

The capacity to exert physical force or energy, expressed as the rate at which energy is expended, is called:

a) Work
b) Power
c) Pressure
d) Intensity

Answer 27

b

Question 28

When a person speaks, the wave form produced has a series of peaks and valleys, each peak is called a:

a) Harmonic
b) Formant
c) Beat
d) Overtone
Answer: b) Formant

Answer 28

b

Question 29

Which of the following is used to connect supra-aural earphones to the sound level meter during calibration?

a) Artificial ear coupler
b) Artificial mastoid
c) Bone conduction vibrator
d) Insert receiver

Answer 29

a

Question 30

What is the phenomenon when a drinking glass shatters due to a particular musical note?

a) Interference
b) Resonance
c) Frequency
d) Harmonics

Answer 30

b