Sound+Vocabulary

__sound__ - a form of energy that you can hear and that travels through matter as waves. __vibrations__ - back and forth movements of matter __compression__ - the region of a sound wave where particles are pushed closer together (aka __crest__) __rarefaction__ - the region of a sound wave where particles are farther apart (aka __trough__) __wavelength__ - the distance from one compression to another __frequency__ - the number of complete waves produced in a unit of time. __amplitude__ - the distance from rest to crest or rest to trough __overtones__ - softer, higher tones that are mixed in with the basic tones __timbre__ - the special sound produced by a musical instrument __noise__ - unpleasant sound __pitch__ - the highness or lowness of a sound __octave__ - a group of 8 notes