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Define amplitude, time period, and frequency of sound wave.
Amplitude: The maximum vertical displacement of a crest or trough in a waveform from zero levels is known as the amplitude of the wave.
Time period: The time taken by a wave to complete a vibration or cycle is known as the time period of the wave. It is denoted by T and its SI unit is second.
Frequency: The number of cycles or vibrations in a second is known as the frequency of the sound wave. It is denoted by $f$ and its SI unit is per second or $/second$.or $Hz$.
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