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CMI
Chapter 11
28
Other
Not Applicable
10/14/2005

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Term
This type of signal produces a continuous and infinitely-detailed waveform.
___________________________
Definition
Analoge Signal
Term
In actuality, this type of signal is not a wave but a collection of discrete data used to describe an analog wave in a form the computer can understand. __________________________________
Definition
Digital Signal
Term
This wave property indicates how many wave cycles are completed per second.
Definition
Period
Term
This is considered the normal frequency range of human hearing.
Definition
20 KHz to 20,000 Hz
Term
Using an analog-to-digital converter to sample a sound wave offers the manipulation of these two parameters.
Definition
Sampling rate and quantization
Term
This is the term for how many samples are taken per second.
Definition
Sample rate
Term
Circle the correct answer.
The higher / lower the sample rate, the more completely the analog wave’s shape can be represented digitally.
Definition
Higher
Term
This rule states that in order to faithfully describe the basic characteristics of an analog wave,
the wave must be sampled at a rate that is at least twice that of the highest frequency being recorded.
Definition
Nyquist Theorem
Term
Determine if the statement is true or false. If false, correct the statement.
The CD sampling rate is higher than that actually required to digitally reproduce the high pitched tones audible to humans.
Definition
False (save space)
Term
The Nyquist Theorem states that as the highest frequency being captured increases, the sample rate used should also increase proportionally. Select the mathematical relationship demonstrated by the Nyquist Theorem.
Definition
Direct proportion
Term
This lower-quality sample rate captures most of the sound frequencies audible to humans, generates less digital data, and requires less memory than sample rates that capture the full range of frequencies audible to humans.
Definition
Broadcast quality 32 KHz
Term
If the highest frequency contained in a particular analog recording is 18,065 Hz, what minimum sampling rate would be required to reproduce the quality of the original sound in digital form?
__________________________________
Definition
36130
Term
This algebraic equation illustrates the Nyquist Theorem, where R = sample rate and
f = frequency.
Definition
R = 2f
Term
Determine if the statement is true or false. If false, correct the statement.
Higher sample rates are responsible for generating more data, thus requiring more
computer storage space.
Definition
True
Term
These frequencies are recorded using sample rates that capture frequencies two to five times the highest frequency audible to humans.
Definition
Harmonics
Term
This is the sampling precision or the length of computer word used to digitally represent the amplitude of a sampled wave. _____________________________________
Definition
quantization
Term
These three terms are also used to refer to quantization.
Definition
Sampling precision
Bit Rate
Bit Depth
Term
Circle the correct response.
Quantization is the process of assigning a wavelength / wave amplitude value to each
sample.
Definition
wave amplitude
Term
Determine if the statement is true or false. If false, correct the statement.
The more bits used to sample a wave, the more detailed its digital amplitude ranges can be.
Definition
True
Term
This algebraic formula illustrates the bit rate, or number of amplitude values available for quantization. The number of bits used is represented by n.
Definition
2 to the power of (n)
Term
The formula for bit rate is this type of function.
Definition
Exponential function
Term
Circle the correct answer.
Sampling error can be reduced by increasing / decreasing both the sampling rate and the quantization.
Definition
increasing
Term
This term refers to the similarity between the original wave and the digital signal generated by the DAC.
Definition
Fidelity
Term
This is the span between the quietest and loudest sound in a recording.
Definition
Dynamic range
Term
This is the volume or loudness of a sound wave.
Definition
Amplitude
Term
Circle the correct answer.
Recording at a higher / lower resolution will capture a fuller dynamic range.
Definition
higher
Term
Determine if the statement is true or false. If false, correct the statement.
If either the sample rate increases, the quantization increases, or both increase, the amount of memory necessary to store a sound file decreases.
Definition
False
Term
the hard drive specifications that are pertinent to direct-to-disk recording.
Definition
Cache size, Throughput, RPMs
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