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Sound waves

Summary

Sound waves are longitudinal waves generated when a vibrating object compresses air molecules, thereby creating traveling pressure variations. Most sounds contain multiple frequencies. The frequency of sound is perceived as pitch. The perception of a sound’s loudness depends largely on amplitude. Because the ear responds to such a wide range of sound pressure levels, the logarithmic decibel scale is used to quantify loudness. In this lesson you will explore the properties and characteristics of sound waves using a set of interactive simulations.
Sound waves

Student lesson materials


Investigations

Electronic resources