Statistical guideline factor

from Wikipedia, the free encyclopedia

The statistical directivity factor st (gamma) (also called directivity deviation factor or statistical directional factor ) is one of the variables used in acoustics to describe the directional characteristic of a sound source . It is defined as the ratio of the effective value of the sound pressure in a certain direction of radiation and distance to the effective value of the sound pressure averaged over all radiation directions at the same distance:


The statistical directivity factor is therefore dependent on the direction of radiation, values> 1 stand for preferred radiation directions.

In an analogous manner, receivers for sound such. B. microphones , specify a statistical directivity factor.

The degree of directivity is the square of the statistical directivity factor, the directivity or directivity is the corresponding dimension with the auxiliary unit of measurement decibel :

See also


  • Michael Dickreiter, Volker Dittel, Wolfgang Hoeg, Martin Wöhr, “Handbuch der Tonstudiotechnik”, 7th completely revised and expanded edition, published by the ARD.ZDF medienakademie, Nuremberg, 2 volumes, publisher: KG Saur, Munich, 2008, ISBN 3-598-11765-5 or ISBN 978-3-598-11765-7

Web links