Reactivity Index

The reactivity index in a given direction at a point is defined as the difference between the sound intensity level and the sound pressure level measured in the given direction at that point. In practise the reactivity index is normally negative. The reactivity index indicates an important character of the sound field as it is measured and is not a direct measure of how reactive the sound field is.

See also: Sound Intensity, Sound Pressure Level.

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Subjects: Audio Noise & Vibration