Avixa CTS Exam Prep UPDATED Exam
Questions and CORRECT Answers
Harmonics are _____. - CORRECT ANSWER - whole number multiples of the
fundamental frequency
Which sequence of numbers depicts part of a logarithmic scale? - CORRECT ANSWER -
1, 10, 100, 1000
Vibration _____ molecules in the air to produce sound. - CORRECT ANSWER - displaces
The equation which correctly states the difference in decibels for two voltages or distances is
_____. - CORRECT ANSWER - 20 times the logarithm of the ratio of the two numbers
being compared
The equation which correctly states the difference in decibels for two power values is _____. -
CORRECT ANSWER - 10 times the logarithm of the ratio of the two numbers being
compared
Sound _____ through a medium. - CORRECT ANSWER - propagates
0 dB SPL describes: - CORRECT ANSWER - threshold of human hearing
Wavelength and frequency determine the _____ of sound, while amplitude determines the
_____. - CORRECT ANSWER - Pitch; magnitude
What is the measurement for frequency? - CORRECT ANSWER - Hertz (Hz)
When sound is generated, energy is spread _____. - CORRECT ANSWER - spherically in
all directions
, Through the Inverse Square Law, the spread of energy that is propagated can be followed ___ -
CORRECT ANSWER - spherically and horizontally
Because air is a(n) _____ medium, vibrated molecules transmit motion to the molecules
surrounding them. - CORRECT ANSWER - elastic
What is a decibel? - CORRECT ANSWER - a logarithmic scale used to describe ratios
with a large range of values
An octave is _____. - CORRECT ANSWER - doubling of frequency
A "just noticeable" change in sound pressure level, either louder or softer, requires a _____
change. - CORRECT ANSWER - +/-3 dB
The "audio" portion of "audiovisual" refers to _____. - CORRECT ANSWER - sound
A logarithm can be defined as the _____. - CORRECT ANSWER - number of times the
numeral 10 must be multiplied by itself to get a certain value
If you go up one octave from 250 Hz, you arrive at _____. - CORRECT ANSWER - 500
Hz
Complex waveforms can be broken down into _____. - CORRECT ANSWER - individual
sine waves
If a sound has a pressure of 10 dB SPL at a distance of 10 m, how much pressure would the
sound have at a distance of 5 m? - CORRECT ANSWER - 16 dB SPL
Questions and CORRECT Answers
Harmonics are _____. - CORRECT ANSWER - whole number multiples of the
fundamental frequency
Which sequence of numbers depicts part of a logarithmic scale? - CORRECT ANSWER -
1, 10, 100, 1000
Vibration _____ molecules in the air to produce sound. - CORRECT ANSWER - displaces
The equation which correctly states the difference in decibels for two voltages or distances is
_____. - CORRECT ANSWER - 20 times the logarithm of the ratio of the two numbers
being compared
The equation which correctly states the difference in decibels for two power values is _____. -
CORRECT ANSWER - 10 times the logarithm of the ratio of the two numbers being
compared
Sound _____ through a medium. - CORRECT ANSWER - propagates
0 dB SPL describes: - CORRECT ANSWER - threshold of human hearing
Wavelength and frequency determine the _____ of sound, while amplitude determines the
_____. - CORRECT ANSWER - Pitch; magnitude
What is the measurement for frequency? - CORRECT ANSWER - Hertz (Hz)
When sound is generated, energy is spread _____. - CORRECT ANSWER - spherically in
all directions
, Through the Inverse Square Law, the spread of energy that is propagated can be followed ___ -
CORRECT ANSWER - spherically and horizontally
Because air is a(n) _____ medium, vibrated molecules transmit motion to the molecules
surrounding them. - CORRECT ANSWER - elastic
What is a decibel? - CORRECT ANSWER - a logarithmic scale used to describe ratios
with a large range of values
An octave is _____. - CORRECT ANSWER - doubling of frequency
A "just noticeable" change in sound pressure level, either louder or softer, requires a _____
change. - CORRECT ANSWER - +/-3 dB
The "audio" portion of "audiovisual" refers to _____. - CORRECT ANSWER - sound
A logarithm can be defined as the _____. - CORRECT ANSWER - number of times the
numeral 10 must be multiplied by itself to get a certain value
If you go up one octave from 250 Hz, you arrive at _____. - CORRECT ANSWER - 500
Hz
Complex waveforms can be broken down into _____. - CORRECT ANSWER - individual
sine waves
If a sound has a pressure of 10 dB SPL at a distance of 10 m, how much pressure would the
sound have at a distance of 5 m? - CORRECT ANSWER - 16 dB SPL
