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what two units are used to measure the frequency and amplitude of a sound wave?

a. hertz is a measure of frequency, and a decibel is a measure of amplitude.
b. a decibel is a measure of frequency, and hertz is a measure of amplitude.
c. the quantization is a measure of frequency, and sampling is a measure of amplitude.
d. sampling is a measure of frequency, and the quantization is a measure of amplitude.

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