COMD 5070 Final Exam - Questions & Detailed
Explanations
What does the frequency of a wave describe Correct Answer -
how many cycles of high/low air pressure per second (how close
together are the peaks of the waveform)
Frequency Correct Answer - how frequently a waveform
repeats
Hertz Correct Answer - cycles per second
To be perceived as sound Correct Answer - vibrations will be
between 20 and 20,000 hz
Complex waveform Correct Answer - waveform that contains
multiple frequencies
Complex tones Correct Answer - pure tones rare in everyday
life
Complex tones Correct Answer - have many frequencies
Complex tones Correct Answer - sounds can have multiple
frequencies and still maintain a repeating pattern
complex tones Correct Answer - sounds that have a repeating
pattern are called periodic
sound pressure level (SPL) Correct Answer - is measured in
decibels
,it is a logarithmic measure of the pressure of a sound relative to a
reference value
when the sound is 1000 hz or 20 micro-pascals Correct Answer -
the softest sound pressure level that will cause the average
tympanic membrane to vibrate
digital Correct Answer - are discrete in time and amplitude
digital Correct Answer - numbers represent snapshots over
time
digital Correct Answer - numbers have finite precision
digital Correct Answer - can be fully represented by a table of
numbers
digital Correct Answer - there are unknowns between the
points
analog Correct Answer - are continuous in time and amplitude
continuous signals Correct Answer - can he examined in any
level of detail
continuous signals Correct Answer - no gaps and infinite
number of points
continuous signals Correct Answer - only a graph could show
it truly
continuous Correct Answer - cannot be fully replicated by a
table of numbers
, sampling rate Correct Answer - the number of snapshots per
second of the around you are recording
Quantization Correct Answer - the process of turning the
height of the waveform into a binary number (series of 0s and 1s)
that can be stored on a computer
quantization Correct Answer - level of detail/focus/resolution
simpler number Correct Answer - cruder record
higher sampling rate Correct Answer - requires bigger files
higher sampling rate Correct Answer - better fidelity
higher sampling rate Correct Answer - more memory usage
more disk space for storage
more processing time for computation
Nyquist frequency Correct Answer - half the sample rate
Nyquist frequency Correct Answer - the highest frequency you
can reproduce
the highest frequency in the signal Correct Answer - sample at
twice the rate of ....
spectrum Correct Answer - show the frequencies present in a
section of the waveform
spectrum Correct Answer - no information about time
spectrum x axis Correct Answer - frequency
Explanations
What does the frequency of a wave describe Correct Answer -
how many cycles of high/low air pressure per second (how close
together are the peaks of the waveform)
Frequency Correct Answer - how frequently a waveform
repeats
Hertz Correct Answer - cycles per second
To be perceived as sound Correct Answer - vibrations will be
between 20 and 20,000 hz
Complex waveform Correct Answer - waveform that contains
multiple frequencies
Complex tones Correct Answer - pure tones rare in everyday
life
Complex tones Correct Answer - have many frequencies
Complex tones Correct Answer - sounds can have multiple
frequencies and still maintain a repeating pattern
complex tones Correct Answer - sounds that have a repeating
pattern are called periodic
sound pressure level (SPL) Correct Answer - is measured in
decibels
,it is a logarithmic measure of the pressure of a sound relative to a
reference value
when the sound is 1000 hz or 20 micro-pascals Correct Answer -
the softest sound pressure level that will cause the average
tympanic membrane to vibrate
digital Correct Answer - are discrete in time and amplitude
digital Correct Answer - numbers represent snapshots over
time
digital Correct Answer - numbers have finite precision
digital Correct Answer - can be fully represented by a table of
numbers
digital Correct Answer - there are unknowns between the
points
analog Correct Answer - are continuous in time and amplitude
continuous signals Correct Answer - can he examined in any
level of detail
continuous signals Correct Answer - no gaps and infinite
number of points
continuous signals Correct Answer - only a graph could show
it truly
continuous Correct Answer - cannot be fully replicated by a
table of numbers
, sampling rate Correct Answer - the number of snapshots per
second of the around you are recording
Quantization Correct Answer - the process of turning the
height of the waveform into a binary number (series of 0s and 1s)
that can be stored on a computer
quantization Correct Answer - level of detail/focus/resolution
simpler number Correct Answer - cruder record
higher sampling rate Correct Answer - requires bigger files
higher sampling rate Correct Answer - better fidelity
higher sampling rate Correct Answer - more memory usage
more disk space for storage
more processing time for computation
Nyquist frequency Correct Answer - half the sample rate
Nyquist frequency Correct Answer - the highest frequency you
can reproduce
the highest frequency in the signal Correct Answer - sample at
twice the rate of ....
spectrum Correct Answer - show the frequencies present in a
section of the waveform
spectrum Correct Answer - no information about time
spectrum x axis Correct Answer - frequency
