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IMA
Chapter 3
27
Other
Not Applicable
09/09/2005

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Cards

Term
A compression and a rarefaction of a sound wave comprise one __________ of the wave.
Definition
cycle
Term
Any matter through which sound travels is known as a __________.
Definition
medium
Term
A microphone converts changes in air pressure to an electrical impulse, which is called ______.
Definition
signal
Term
Frequency is defined as:
Definition
the number of waves passing a single point in a specific time.
Term
The unit by which frequency is measured is the __________.
Definition
Hertz
Term
Human beings perceive change in frequency as high or low sounds, or change in _______.
Definition
pitch
Term
The maximum displacement, or strength, of a wave is known as its __________.
Definition
amplitude
Term
“The unit of measure expressing the intensity of a signal on a logarithmic scale” is the definition of the __________.
Definition
decibel
Term
The range of greatest sensitivity in human hearing falls between:
Definition
20 Hz to 20 kHz
Term
The federal entity that regulates workplace noise levels is:
Definition
OSHA
Term
Dividing the speed of a wave by its frequency will reveal its __________.
Definition
wavelength
Term
A(n) __________ is the time required to complete one cycle of a wave.
Definition
period
Term
Simple waves and complex waves are the two broad categories of __________.
Definition
waveform
Term
The unit of measurement of phase is the __________.
Definition
degree
Term
In mathematics, different exponents of the same base are called __________.
Definition
logarithms
Term
Any ______ increase in loudness is double the actual sound power.
Definition
3 dB
Term
This is a unit of pressure equal to one Newton of force acting uniformly upon a square meter.
Definition
Pascal
Term
Two or more waves occupying the same space will have an effect on one another. This is called __________.
Definition
interference
Term
When two waves with identical phase occupy the same space and reinforce each others’
compressions and rarefactions, they are said to be __________.
Definition
in phase
Term
What occurs when two waves are 180 degrees out of phase, and the compression of one
wave happens exactly as the rarefaction of the other?
Definition
Cancellation
Term
Rooms with lots of reflections are known as _________, while rooms with few reflections are called _________.
Definition
live; dead
Term
Multiple reflections off of multiple boundaries are known as _______.
Definition
reverberations
Term
A wave that has a lack of vibration at certain points, between which are areas of maximum vibration, are called __________.
Definition
standing waves
Term
This is a place in a room that the source wave and its reflection are 180 degrees out of phase, creating a pocket of silence for that frequency.
Definition
Node
Term
This is a place where the source wave and its reflection greatly reinforce each other because they are in phase.
Definition
Antinode
Term
This phenomenon occurs when the energy of a sound wave is absorbed into a boundary
and sets it into motion.
Definition
Transmission
Term
What is known as the bending of a wave around the edge of a barrier?
Definition
Diffraction
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