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Historical
AMCA 302-73 (R2008)
Application of Sone Loudness Ratings for Non-Ducted Air Moving Devices
The charts and formulae given in this bulletin are for the purpose of estimating the loudness of fans as installed, and take into consideration room size and acoustical qualities as well as the number and loudness ratings of the fans. It will be necessary to know the acoustical characteristics of other noise sources within the room to be able to estimate the total loudness of all sources. For the addition of sounds, it is assumed that the noise spectrums are similar. The room effect chart is for the reverberant field in the room, and applies everywhere except in the space near the fan. Within this space, the direct sound field can be estimated and added to the reverberant field to obtain total loudness.
Content Provider
The Air Movement and Control Association International, Inc. [amca]
