AVIXA Audio 1: Essentials
Transmission is defined as sound energy that is _____.
reflected through a partition
not reflected or absorbed
absorbed and reflected
remaining in the space - not reflected or absorbed
Given the same reference sound input level into two different microphones, the more sensitive
microphone would provide _____.
A higher electrical output
Higher converted acoustical energy
A lower electrical output
Lower converted acoustical energy - A higher electrical output
Harmonics are _____.
the particular make-up of complex waveforms
varying proportional energy levels of a fundamental frequency
the whole number multiples of a fundamental frequency
the whole number multiples of individual sine waves - the whole number multiples of a
fundamental frequency
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?
16 dB SPL
20 dB SPL
4 dB SPL
5 dB SPL - 16 dB SPL
,Through the Inverse Square Law, the spread of energy that is propagated can be followed _____.
only horizontally
vertically and horizontally
only spherically
spherically and horizontally - spherically and horizontally
A "just noticeable" change in sound pressure level, either louder or softer, requires a _____ change.
+/-10 dB
+/-1 dB
+/-3 dB
+/-6 dB - +/-3 dB
If you go up one octave from 250 Hz, you arrive at _____.
1250 Hz
125 Hz
500 Hz
251 Hz - 500 Hz
0 dB SPL describes:
the threshold of human hearing
the threshold of pain
ambient noise level
normal listening level - the threshold of human hearing
What is the measurement for frequency?
Wavelength
DC
, Hertz
AC - Hertz
Wavelength and frequency determine the __________ of sound, while amplitude determines the
__________.
Pitch; volume
Volume; speed
Volume; tone
Speed; tone - Pitch; volume
Wavelength is the __________.
Cycle when molecules move from rest through compression to rest and rarefaction.
Physical distance between two points of a waveform that are exactly one cycle apart.
Number of times a wavelength cycle occurs per second.
Intensity or loudness of a sound in a particular medium. - Physical distance between two points of
a waveform that are exactly one cycle apart.
Complex waveforms can be broken down into _____.
individual sine waves
varying proportional energy levels
simple waveforms
wavelengths and frequencies - individual sine waves
Sound _____ through a medium.
resounds
processes
propagates
generates - propagates
Transmission is defined as sound energy that is _____.
reflected through a partition
not reflected or absorbed
absorbed and reflected
remaining in the space - not reflected or absorbed
Given the same reference sound input level into two different microphones, the more sensitive
microphone would provide _____.
A higher electrical output
Higher converted acoustical energy
A lower electrical output
Lower converted acoustical energy - A higher electrical output
Harmonics are _____.
the particular make-up of complex waveforms
varying proportional energy levels of a fundamental frequency
the whole number multiples of a fundamental frequency
the whole number multiples of individual sine waves - the whole number multiples of a
fundamental frequency
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?
16 dB SPL
20 dB SPL
4 dB SPL
5 dB SPL - 16 dB SPL
,Through the Inverse Square Law, the spread of energy that is propagated can be followed _____.
only horizontally
vertically and horizontally
only spherically
spherically and horizontally - spherically and horizontally
A "just noticeable" change in sound pressure level, either louder or softer, requires a _____ change.
+/-10 dB
+/-1 dB
+/-3 dB
+/-6 dB - +/-3 dB
If you go up one octave from 250 Hz, you arrive at _____.
1250 Hz
125 Hz
500 Hz
251 Hz - 500 Hz
0 dB SPL describes:
the threshold of human hearing
the threshold of pain
ambient noise level
normal listening level - the threshold of human hearing
What is the measurement for frequency?
Wavelength
DC
, Hertz
AC - Hertz
Wavelength and frequency determine the __________ of sound, while amplitude determines the
__________.
Pitch; volume
Volume; speed
Volume; tone
Speed; tone - Pitch; volume
Wavelength is the __________.
Cycle when molecules move from rest through compression to rest and rarefaction.
Physical distance between two points of a waveform that are exactly one cycle apart.
Number of times a wavelength cycle occurs per second.
Intensity or loudness of a sound in a particular medium. - Physical distance between two points of
a waveform that are exactly one cycle apart.
Complex waveforms can be broken down into _____.
individual sine waves
varying proportional energy levels
simple waveforms
wavelengths and frequencies - individual sine waves
Sound _____ through a medium.
resounds
processes
propagates
generates - propagates
