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IEVref:801-31-11ID:
Language:enStatus: Standard
Term: room absorption
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Definition: sum of Sabine absorptions due to objects and surfaces in a room, and due to dissipation of energy in the medium within the room

NOTE 1 – With Ai as the Sabine absorption of the i-th surface or object or medium in a room, room absorption is A = Σ Ai.

NOTE 2 – Sabine absorption due to dissipation in the medium, in a room of volume V, is:

A m = 4 10lo g 10 e αV=0,921αV MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbbjxAHXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeqabiGaciGacaqadmaadaqaaqaaaOqaaiaadgeadaWgaaWcbaacbaGaa8xBaaqabaGccqGH9aqpdaWcaaqaaiaaisdaaeaaimaacaGFXaGaa4hmaiGaykW7caaMc8Uaa8hBaiaa=9gacaWFNbWaaSbaaSqaaiaaigdacaaIWaaabeaakiaabwgaaaaccaGae0xSdeMaamOvaiabg2da9iaa+bdacaGFUaGaa4xoaiaa+jdacaGFXaGaaGPaVlab9f7aHjaadAfaaaa@4DEB@

where:
α is the attenuation coefficient of the medium in decibels per unit length.


Publication date:1994-07
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Internal notes:2017-06-02: Cleanup - Remove Attached Image 801-31-11.gif
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