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[[Image:lighterstill.jpg]][[Image:Sound_2.jpg|right|frame]]
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'''Sound''' is a disturbance of [[mechanical energy]] that propagates through [[matter]] as a [[wave]]. Sound is characterized by the [[Wave#Physical description of a wave|properties of waves]], which are [[frequency]], [[wavelength]], [[period]], [[amplitude]], and [[speed of sound|speed]].
'''Sound''' is a disturbance of [[mechanical energy]] that propagates through [[matter]] as a [[wave]]. Sound is characterized by the [[Wave#Physical description of a wave|properties of waves]], which are [[frequency]], [[wavelength]], [[period]], [[amplitude]], and [[speed of sound|speed]].
