What term refers to regions of decreased particle density in a sound beam?

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Multiple Choice

What term refers to regions of decreased particle density in a sound beam?

Explanation:
In a sound beam, the wave creates alternating regions of high density (compressions) and low density (rarefactions). The zones where particles are spread apart and density and pressure are reduced are called rarefactions. This term specifically describes the low-density part of the wave. Attenuation refers to the loss of energy as the wave travels, transmission is the passing of the wave through a medium, and reverberation is the lingering sound caused by reflections. So the region of decreased particle density in a sound beam is rarefaction.

In a sound beam, the wave creates alternating regions of high density (compressions) and low density (rarefactions). The zones where particles are spread apart and density and pressure are reduced are called rarefactions. This term specifically describes the low-density part of the wave. Attenuation refers to the loss of energy as the wave travels, transmission is the passing of the wave through a medium, and reverberation is the lingering sound caused by reflections. So the region of decreased particle density in a sound beam is rarefaction.

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