Chapter 2 Flashcards
When molecules in a sound wave are close together, they are in the ____ phase.
a) Compression
b) Rarefaction
c) Transverse
d) Sinusoidal
c
What is the term for the rapid and random movement of air particles?
a) Elasticity
b) Brownian motion
c) Resonance
d) Rarefaction
b
The frequency of a wave is measured in:
a) Decibels
b) Pascals
c) Hertz
d) Newtons
c
As the length of a wave increases, its frequency:
a) Increases
b) Decreases
c) Stays the same
d) Doubles
b
The natural rate of vibration of a mass is called:
a) Frequency
b) Wavelength
c) Resonant frequency
d) Pitch
c
Sound travels faster through a ____ than through a liquid or gas.
a) Solid
b) Vacuum
c) Plasma
d) None of the above
a
The speed with which a sound wave travels is known as:
a) Frequency
b) Wavelength
c) Sound velocity
d) Intensity
c
When the frequency of a sound increases, the wavelength:
a) Increases
b) Decreases
c) Remains constant
d) Doubles
b
When two tones of almost identical frequency are presented, the changes in amplitude are perceived as:
a) Harmonics
b) Beats
c) Resonance
d) Masking
b
A complex wave can be analyzed in terms of its ____ components.
a) Transverse
b) Sinusoidal
c) Longitudinal
d) Resonant
b
In a periodic complex sound, all frequencies are ____ multiples of the fundamental frequency.
a) Fractional
b) Decimal
c) Whole-number
d) Half-number
c
The intensity of a sound wave is the amount of ____ per unit of area.
a) Pressure
b) Force
c) Power
d) Velocity
b
As the force increases, the ____ also increases.
a) Wavelength
b) Frequency
c) Pressure
d) Velocity
c
The opposition a medium offers to the transmission of acoustic energy is called:
a) Resonance
b) Impedance
c) Frequency
d) Amplitude
b
The unit of measurement of intensity used in acoustics and audiometers is the:
a) Pascal
b) Hertz
c) Decibel
d) Newton
c
The decibel involves a ratio and utilizes a:
a) Polynomial
b) Exponential
c) Logarithm
d) Sine wave
c
When the intensity of a wave is doubled, the number of decibels is increased by:
a) 2
b) 3
c) 4
d) 5
b
Most audiometers range from about ____ dB HL to 110 dB HL.
a) 0
b) 10
c) 20
d) 30
a
The ability to tell the direction from which sound comes without seeing the source is called:
a) Localization
b) Masking
c) Interference
d) Resonance
a
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
c
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
d
Sound level meters are used to monitor noise exposure levels in:
a) Schools
b) Industry
c) Hospitals
d) Homes
b
When the sound-pressure values are doubled, the number of decibels is increased by:
a) 2
b) 4
c) 6
d) 8
c
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
d
As the density of an object increases, the impedance:
a) Decreases
b) Increases
c) Remains the same
d) Doubles
b
What is the lowest sound intensity to stimulate normal hearing called?
a) Threshold
b) Audiometric zero
c) Sensation level
d) Localization
b
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
b
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
b
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
a
What is the phenomenon when a drinking glass shatters due to a particular musical note?
a) Interference
b) Resonance
c) Frequency
d) Harmonics
b
