COMD 5070 2025/2026 Exam Questions
with Detailed Verified Answers (100%
Correct Answers) | Already Graded A+
As sound travels through air, which of the following changes occur:
a. the molecules change their composition
b. sound can only be transmitted through solid objects, so no changes
occur to the air itself
c. the air molecules travel from the speaker to the listener
d. changes occur in air pressure - 🧠 ANSWER ✔✔d. changes occur in air
pressure
The frequency of a sound wave
,a. is related to the number of vibrations of air molecules that occur each
second
b. is directly related to how loud we perceive the sound to be
c. is greater for higher amplitude sounds
d. must be above 10,000 Hz in order to be heard by humans - 🧠 ANSWER
✔✔a. is related to the number of vibrations of air molecules that occur each
second
The intensity of a sound can be defined as
a. its power in watts divided by area
b. period multiplied by velocity
c. force times frequency
d. amplitude divided by acceleration - 🧠 ANSWER ✔✔a. its power in watts
divided by area
The amplitude of a sound wave (i.e. the height of the wave) is related to:
a.the speed of sound
b.the change in air pressure produced by the wave
c. the size of the area that the sound is hitting
,d. pressure multiplied by time - 🧠 ANSWER ✔✔b.the change in air pressure
produced by the wave
The inverse square law means that
a.intensity decreases by a factor equal to the square of the change in
distance
b. the reciprocal of the intensity gives the square of the pressure
c. the sum of squares of the energy equals the inverse of the amplitude
d. decibels are logarithmic as long as you take the square of the reference
pressure - 🧠 ANSWER ✔✔a.intensity decreases by a factor equal to the
square of the change in distance
Pitch and loudness are:
a. Perceptual correlates of physical properties, their values depend on the
what the listener is experiencing.
c. Physical properties of the waveform
Values that will not change based on the frequency of the sound
d. Values that will not change based on the distance that the listener is
standing from the sound source - 🧠 ANSWER ✔✔a. Perceptual correlates
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, of physical properties, their values depend on the what the listener is
experiencing.
There is a 20Hz difference between two sounds. We will probably perceive
differences in the pitch of two sounds more easily if the sounds are:
a. two mid-range frequencies
b. the frequency being low or high makes no difference
c. two higher frequencies
d. two lower frequencies - 🧠 ANSWER ✔✔d. two lower frequencies
The human voice is best described as
a. none of the answers describe the human voice
b. completely aperiodic with no repeating components
c. a complex wave containing multiple frequencies
d. a pure tone, like a sine wave - 🧠 ANSWER ✔✔c. a complex wave
containing multiple frequencies
The fundamental frequency is...
a. the lowest frequency component in the complex sound
with Detailed Verified Answers (100%
Correct Answers) | Already Graded A+
As sound travels through air, which of the following changes occur:
a. the molecules change their composition
b. sound can only be transmitted through solid objects, so no changes
occur to the air itself
c. the air molecules travel from the speaker to the listener
d. changes occur in air pressure - 🧠 ANSWER ✔✔d. changes occur in air
pressure
The frequency of a sound wave
,a. is related to the number of vibrations of air molecules that occur each
second
b. is directly related to how loud we perceive the sound to be
c. is greater for higher amplitude sounds
d. must be above 10,000 Hz in order to be heard by humans - 🧠 ANSWER
✔✔a. is related to the number of vibrations of air molecules that occur each
second
The intensity of a sound can be defined as
a. its power in watts divided by area
b. period multiplied by velocity
c. force times frequency
d. amplitude divided by acceleration - 🧠 ANSWER ✔✔a. its power in watts
divided by area
The amplitude of a sound wave (i.e. the height of the wave) is related to:
a.the speed of sound
b.the change in air pressure produced by the wave
c. the size of the area that the sound is hitting
,d. pressure multiplied by time - 🧠 ANSWER ✔✔b.the change in air pressure
produced by the wave
The inverse square law means that
a.intensity decreases by a factor equal to the square of the change in
distance
b. the reciprocal of the intensity gives the square of the pressure
c. the sum of squares of the energy equals the inverse of the amplitude
d. decibels are logarithmic as long as you take the square of the reference
pressure - 🧠 ANSWER ✔✔a.intensity decreases by a factor equal to the
square of the change in distance
Pitch and loudness are:
a. Perceptual correlates of physical properties, their values depend on the
what the listener is experiencing.
c. Physical properties of the waveform
Values that will not change based on the frequency of the sound
d. Values that will not change based on the distance that the listener is
standing from the sound source - 🧠 ANSWER ✔✔a. Perceptual correlates
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED 3
, of physical properties, their values depend on the what the listener is
experiencing.
There is a 20Hz difference between two sounds. We will probably perceive
differences in the pitch of two sounds more easily if the sounds are:
a. two mid-range frequencies
b. the frequency being low or high makes no difference
c. two higher frequencies
d. two lower frequencies - 🧠 ANSWER ✔✔d. two lower frequencies
The human voice is best described as
a. none of the answers describe the human voice
b. completely aperiodic with no repeating components
c. a complex wave containing multiple frequencies
d. a pure tone, like a sine wave - 🧠 ANSWER ✔✔c. a complex wave
containing multiple frequencies
The fundamental frequency is...
a. the lowest frequency component in the complex sound
