crest - the peak or high point of sound, trough - the low point of sound, wavelength - the distance between a point on one wave to the same point on the next wave, compression - particles pushed together, rarefaction - particles spread back out, frequency - number of times a sound vibrates per second, amplitude - the height of a sound wave, decibel - unit used to measure the loudness of sound, pitch - the highness or lowness of a sound, amplification - the process of making sound louder,

Sound Waves

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