'''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]]. |