| − | '''Sound''' is a disturbance, caused by variations in [[pressure]], that travels as [[waves]] through a [[medium]]. The study of sound is known as [[acoustics]]. Humans detect sound waves through their [[ears]]. | + | '''Sound''' is a disturbance, caused by variations in [[pressure]], that travels as [[waves]] through a [[medium]] such as air or water, disturbing molecules on the way. The study of sound is known as [[acoustics]]. Humans detect sound waves through their [[ears]]. |