COMD 5070 EXAM READY - VERIFIED QUESTIONS AND
ANSWERS - COMPREHENSIVE LATEST VERSION
What is the unit of measurement for frequency? A) Decibel B) Hertz C)
Watt D) Pascal ANSWER : B
What is the definition of frequency? A) Intensity of sound B) Speed of
sound C) Cycles per second D) Distance between peaks ANSWER : C
What is the normal range of human hearing for frequency? A) 20-20,000
Hz B) 250-8,000 Hz C) 10-10,000 Hz D) 100-1,000 Hz ANSWER : A
What are the three perceptual correlates of sound? A) Pitch, loudness,
timbre B) Frequency, amplitude, wavelength C) Hertz, decibel, second
D) Volume, tone, echo ANSWER : A
What is the unit of measurement for amplitude/intensity? A) Hertz B)
Meter C) Decibel D) Volt ANSWER : C
What does a decibel measure? A) Absolute sound pressure B) A ratio of
two sound pressures C) Wavelength D) Frequency ANSWER : B
What is the reference pressure for Sound Pressure Level (SPL)? A) 1
µPa B) 20 µPa C) 1 Pa D) 0.0002 Pa ANSWER : B
What is the reference intensity for Hearing Level (HL)? A) 20 µPa B) The
quietest sound a human can hear at each frequency C) 1 watt D) 0 dB
SPL ANSWER : B
A sound measuring 0 dB HL me ANSWER : A) There is no sound B) It is
at the threshold of normal human hearing C) It is dangerously loud D) It
is below 0 degrees Celsius ANSWER : B
What type of signal contains only one frequency? A) White noise B)
Complex tone C) Pure tone D) Pink noise ANSWER : C
What is a complex periodic sound? A) White noise B) A sound with
multiple frequencies in a harmonic relationship C) A pure tone D) A
sound with random frequencies ANSWER : B
,What is the fundamental frequency (F0)? A) The highest frequency in a
sound B) The lowest frequency in a complex periodic sound C) The
average frequency D) The most intense frequency ANSWER : B
What type of noise has equal energy per octave? A) White noise B) Pink
noise C) Speech noise D) Narrowband noise ANSWER : B
What type of noise has equal energy across all frequencies? A) White
noise B) Pink noise C) Broadband noise D) Narrowband noise ANSWER
:A
What is wavelength? A) The speed of sound divided by frequency B) The
height of a sound wave C) The intensity of a wave D) The pitch of a wave
ANSWER : A
How does sound travel fastest? A) Through air B) Through water C)
Through steel D) Through a vacuum ANSWER : C
Sound cannot travel through a: A) Liquid B) Solid C) Gas D) Vacuum
ANSWER : D
What is the speed of sound in air at room temperature? A) 1,130 ft/s B)
500 ft/s C) 3,000 ft/s D) 100 ft/s ANSWER : A
If frequency increases, what happens to wavelength? A) Increases B)
Decreases C) Stays the same D) Doubles ANSWER : B
A 10 dB increase in intensity represents how much of an increase in
acoustic energy? A) 2 times B) 10 times C) 100 times D) 1,000 times
ANSWER : B
A 20 dB increase represents how many times the acoustic energy? A) 10
B) 20 C) 100 D) 1,000 ANSWER : C
What is phase? A) The amplitude of a wave B) The timing relationship
between two sound waves C) The frequency of a wave D) The speed of a
wave ANSWER : B
If two waves are perfectly out of phase (180 degrees), what happens? A)
They get louder B) They cancel each other out C) The frequency doubles
D) The wavelength halves ANSWER : B
What is a tr ANSWER ducer? A) A device that measures frequency B) A
device that converts one form of energy to another C) A type of hearing
loss D) A unit of sound pressure ANSWER : B
, Which of the following is an example of a tr ANSWER ducer? A)
Audiometer B) Loudspeaker C) Microphone D) Both B and C ANSWER :
D
What is the inverse square law? A) Intensity decreases by 6 dB when
distance doubles B) Intensity increases by 6 dB when distance doubles
C) Frequency halves when distance doubles D) Amplitude stays
constant regardless of distance ANSWER : A
What is resonance? A) The stopping of a sound wave B) The
prolongation of sound due to reflection C) The amplification of a
frequency that matches the natural frequency of an object D) The
absorption of sound ANSWER : C
What is impedance? A) The speed of sound B) The opposition to the flow
of sound energy C) The frequency of a sound D) The amplitude of a
sound ANSWER : B
What are the two main components of impedance? A) Mass and weight
B) Mass and stiffness C) Stiffness and friction D) Friction and weight
ANSWER : B
At low frequencies, impedance is primarily determined by: A) Mass B)
Stiffness C) Friction D) Resistance ANSWER : B
At high frequencies, impedance is primarily determined by: A) Mass B)
Stiffness C) Friction D) Resistance ANSWER : A
What is a filter? A) A device that amplifies all sound B) A device that
removes specific frequencies from a sound C) A device used to
measure hearing D) A type of earplug ANSWER : B
A low-pass filter allows frequencies _______ the cutoff to pass through.
A) Below B) Above C) Exactly at D) None of the above ANSWER : A
What is the octave band centered at 1000 Hz? A) 500-1000 Hz B) 1000-
2000 Hz C) 707-1414 Hz D) 900-1100 Hz ANSWER : C
What does SPL stand for? A) Sound Pressure Level B) Speech
Perception Level C) Standard Pure Tone Level D) Sound Power Level
ANSWER : A
In the dB IL scale, what is the reference? A) 20 µPa B) 10^-12 watts/m^2
C) 1 dyne/cm^2 D) 0.0002 dyne/cm^2 ANSWER : B
ANSWERS - COMPREHENSIVE LATEST VERSION
What is the unit of measurement for frequency? A) Decibel B) Hertz C)
Watt D) Pascal ANSWER : B
What is the definition of frequency? A) Intensity of sound B) Speed of
sound C) Cycles per second D) Distance between peaks ANSWER : C
What is the normal range of human hearing for frequency? A) 20-20,000
Hz B) 250-8,000 Hz C) 10-10,000 Hz D) 100-1,000 Hz ANSWER : A
What are the three perceptual correlates of sound? A) Pitch, loudness,
timbre B) Frequency, amplitude, wavelength C) Hertz, decibel, second
D) Volume, tone, echo ANSWER : A
What is the unit of measurement for amplitude/intensity? A) Hertz B)
Meter C) Decibel D) Volt ANSWER : C
What does a decibel measure? A) Absolute sound pressure B) A ratio of
two sound pressures C) Wavelength D) Frequency ANSWER : B
What is the reference pressure for Sound Pressure Level (SPL)? A) 1
µPa B) 20 µPa C) 1 Pa D) 0.0002 Pa ANSWER : B
What is the reference intensity for Hearing Level (HL)? A) 20 µPa B) The
quietest sound a human can hear at each frequency C) 1 watt D) 0 dB
SPL ANSWER : B
A sound measuring 0 dB HL me ANSWER : A) There is no sound B) It is
at the threshold of normal human hearing C) It is dangerously loud D) It
is below 0 degrees Celsius ANSWER : B
What type of signal contains only one frequency? A) White noise B)
Complex tone C) Pure tone D) Pink noise ANSWER : C
What is a complex periodic sound? A) White noise B) A sound with
multiple frequencies in a harmonic relationship C) A pure tone D) A
sound with random frequencies ANSWER : B
,What is the fundamental frequency (F0)? A) The highest frequency in a
sound B) The lowest frequency in a complex periodic sound C) The
average frequency D) The most intense frequency ANSWER : B
What type of noise has equal energy per octave? A) White noise B) Pink
noise C) Speech noise D) Narrowband noise ANSWER : B
What type of noise has equal energy across all frequencies? A) White
noise B) Pink noise C) Broadband noise D) Narrowband noise ANSWER
:A
What is wavelength? A) The speed of sound divided by frequency B) The
height of a sound wave C) The intensity of a wave D) The pitch of a wave
ANSWER : A
How does sound travel fastest? A) Through air B) Through water C)
Through steel D) Through a vacuum ANSWER : C
Sound cannot travel through a: A) Liquid B) Solid C) Gas D) Vacuum
ANSWER : D
What is the speed of sound in air at room temperature? A) 1,130 ft/s B)
500 ft/s C) 3,000 ft/s D) 100 ft/s ANSWER : A
If frequency increases, what happens to wavelength? A) Increases B)
Decreases C) Stays the same D) Doubles ANSWER : B
A 10 dB increase in intensity represents how much of an increase in
acoustic energy? A) 2 times B) 10 times C) 100 times D) 1,000 times
ANSWER : B
A 20 dB increase represents how many times the acoustic energy? A) 10
B) 20 C) 100 D) 1,000 ANSWER : C
What is phase? A) The amplitude of a wave B) The timing relationship
between two sound waves C) The frequency of a wave D) The speed of a
wave ANSWER : B
If two waves are perfectly out of phase (180 degrees), what happens? A)
They get louder B) They cancel each other out C) The frequency doubles
D) The wavelength halves ANSWER : B
What is a tr ANSWER ducer? A) A device that measures frequency B) A
device that converts one form of energy to another C) A type of hearing
loss D) A unit of sound pressure ANSWER : B
, Which of the following is an example of a tr ANSWER ducer? A)
Audiometer B) Loudspeaker C) Microphone D) Both B and C ANSWER :
D
What is the inverse square law? A) Intensity decreases by 6 dB when
distance doubles B) Intensity increases by 6 dB when distance doubles
C) Frequency halves when distance doubles D) Amplitude stays
constant regardless of distance ANSWER : A
What is resonance? A) The stopping of a sound wave B) The
prolongation of sound due to reflection C) The amplification of a
frequency that matches the natural frequency of an object D) The
absorption of sound ANSWER : C
What is impedance? A) The speed of sound B) The opposition to the flow
of sound energy C) The frequency of a sound D) The amplitude of a
sound ANSWER : B
What are the two main components of impedance? A) Mass and weight
B) Mass and stiffness C) Stiffness and friction D) Friction and weight
ANSWER : B
At low frequencies, impedance is primarily determined by: A) Mass B)
Stiffness C) Friction D) Resistance ANSWER : B
At high frequencies, impedance is primarily determined by: A) Mass B)
Stiffness C) Friction D) Resistance ANSWER : A
What is a filter? A) A device that amplifies all sound B) A device that
removes specific frequencies from a sound C) A device used to
measure hearing D) A type of earplug ANSWER : B
A low-pass filter allows frequencies _______ the cutoff to pass through.
A) Below B) Above C) Exactly at D) None of the above ANSWER : A
What is the octave band centered at 1000 Hz? A) 500-1000 Hz B) 1000-
2000 Hz C) 707-1414 Hz D) 900-1100 Hz ANSWER : C
What does SPL stand for? A) Sound Pressure Level B) Speech
Perception Level C) Standard Pure Tone Level D) Sound Power Level
ANSWER : A
In the dB IL scale, what is the reference? A) 20 µPa B) 10^-12 watts/m^2
C) 1 dyne/cm^2 D) 0.0002 dyne/cm^2 ANSWER : B
