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Glossary Acustics / Term

Directivity index

In a given direction from a sound source under consideration the directivity index is the difference in decibels between the sound pressure level produced by the source in that direction and the space averaged sound pressure level of that source measured at the same distance. This unit is often used in predicting noise levels away from a source of known output and directivity when performing noise control.

Permanent link Directivity index - Creation date 2021-04-13


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