??? ??? ??? Mechanical waves forms when a disturbance causes energy to be transferred through matter such as air or water ??? ??? ??? Vibration a rapid back-and-forth movement of an object ??? ??? ??? Pitch how high or low you perceive the sound to be ??? ??? ??? Volume how loud or soft a sound is ??? ??? ??? A sound with ________ frequency has _______ pitch. low frequency has low pitch ??? ??? ??