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Sound is a vibration that propagates as a typically audible mechanical wave of pressure and displacement, through a medium such as air or water.

Amplitude is the objective measurement of the degree of change (positive or negative) in atmospheric pressure (the compression and rarefaction of air molecules) caused by sound waves.

Time Period the time to complete one full cycle, or one oscillation.

Frequency describes the number of waves that pass a fixed place in a given time interval.

Loudness is the characteristic of a sound that is primarily a psychological correlate of physical strength.

Pitch is the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone.

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