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COMD 5070 Rosen and Howell quiz 1
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COMD 5070 Rosen and Howell quiz 1
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COMD 5070 Rosen and Howell quiz 1which of the following is an analog signal? - -speech sounds in air
musical tones in air
displacement of the middle ear bones
all of the above
-an analog signal - -is continuous in amplitude
is continuous in time
-a table of numbers could fully represent - -a digital signal
-you cannot listen to digital sound via digital headphones - -because the
sound is really generated by analog loudspeakers
-quantization refers to - -the assignment of an analog value to the nearest
digital value available
-an 8- bit A/D system has how many quantization levels? - -256
-he sampling theorem indicates - -the minimum sample rate needed to
perfectly reconstruct a signal
-aliasing during digital recording means that - -a sinusoid is transformed
into a different frequency
-anti-aliasing filtering - -removes frequency components above the Nyquist
frequency
-low-pass filtering during DAC playback - -is mandatory to eliminate the
'steps' in the analog waveform
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