COMD 5070 EXAMINATION TEST 2026
FULL SOLUTION QUESTIONS WITH
ANSWERS GRADED A+
◉ What is the difference between linear and logarithmic scales?
Answer: Linear scales have equal spacing; logarithmic scales
examine small differences and are not equally spaced.
◉ What happens when you add two identical sounds in decibels?
Answer: You cannot simply add dB values; first, add the pressures,
then compute the dB.
◉ What is dB SPL? Answer: Sound pressure level, a measure of
sound intensity based on pressure.
◉ What is dB HL? Answer: Hearing level, an adjusted scale based on
human ear sensitivity across frequencies.
◉ What is dB SL? Answer: Sensation level, measuring how many dB
above a person's threshold.
, ◉ What is the purpose of weighting in sound level meters? Answer:
To approximate human hearing sensitivity, often less sensitive to low
and high frequencies.
◉ What does dB(A) represent? Answer: A weighting that reflects
human hearing sensitivity, emphasizing mid-range frequencies.
◉ What does dB(C) represent? Answer: A weighting that treats all
frequencies equally without special treatment.
◉ What does dB(Z) represent? Answer: A flat response
measurement of sound intensity without regard to human
perception.
◉ What is the significance of the threshold of hearing? Answer: It is
the softest perceptible tone at 1000 Hertz, used as a reference for
sound measurements.
◉ How does sound pressure relate to atmospheric pressure?
Answer: Sound pressure is caused by localized changes in pressure
from sound vibrations, not the same as atmospheric pressure.
◉ What is the effect of adding sound pressures from two cars
passing by? Answer: The combined sound pressure results in a
higher dB level than simply adding the dB values.
FULL SOLUTION QUESTIONS WITH
ANSWERS GRADED A+
◉ What is the difference between linear and logarithmic scales?
Answer: Linear scales have equal spacing; logarithmic scales
examine small differences and are not equally spaced.
◉ What happens when you add two identical sounds in decibels?
Answer: You cannot simply add dB values; first, add the pressures,
then compute the dB.
◉ What is dB SPL? Answer: Sound pressure level, a measure of
sound intensity based on pressure.
◉ What is dB HL? Answer: Hearing level, an adjusted scale based on
human ear sensitivity across frequencies.
◉ What is dB SL? Answer: Sensation level, measuring how many dB
above a person's threshold.
, ◉ What is the purpose of weighting in sound level meters? Answer:
To approximate human hearing sensitivity, often less sensitive to low
and high frequencies.
◉ What does dB(A) represent? Answer: A weighting that reflects
human hearing sensitivity, emphasizing mid-range frequencies.
◉ What does dB(C) represent? Answer: A weighting that treats all
frequencies equally without special treatment.
◉ What does dB(Z) represent? Answer: A flat response
measurement of sound intensity without regard to human
perception.
◉ What is the significance of the threshold of hearing? Answer: It is
the softest perceptible tone at 1000 Hertz, used as a reference for
sound measurements.
◉ How does sound pressure relate to atmospheric pressure?
Answer: Sound pressure is caused by localized changes in pressure
from sound vibrations, not the same as atmospheric pressure.
◉ What is the effect of adding sound pressures from two cars
passing by? Answer: The combined sound pressure results in a
higher dB level than simply adding the dB values.
