Acoustics 101

Sound is transmitted through alternating changes in pressure that push and pull air molecules to create waves.

Wavelength is the distance between peaks in sound wave. Ranges from 17 m to 1.7 cm. That's 1000:1 compared to 2:1 for light.

Frequency indicates how often sound vibrations are occurring. Low frequency= long wavelength. Measured in Hz (cycles/sec).

Phase represents the start time difference btween two signals of the same frequency. Opposite phase signals cancel each other.

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