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EVS-EN ISO 3744:2009

Acoustics - Determination of sound power levels of noise sources using sound pressure - Engineering method in an essentially free field over a reflecting plane

General information
Withdrawn from 06.12.2010
Base Documents
ISO 3744:1994; EN ISO 3744:2009
Directives or regulations
None

Standard history

Status
Date
Type
Name
06.12.2010
Main
Main
EVS-EN ISO 3744:2005
This  International  Standard  specifies  a  method  for measuring  the  sound  pressure  levels  on  a  measure- ment  surface  enveloping  a  noise  source,  under  es- sentially  free-field  conditions  near  one  or  more reflecting  planes,  in  order  to  calculate  the  sound power  level  produced  by  the  noise  source.  It  gives requirements  for  the  test  environment  and  instru- mentation,  as  well  as  techniques  for  obtaining  the surface  sound  pressure  level  from  which  the  sound power  level  of  the  source  is  calculated,  leading  to  re- sults  which  have  a grade  2  accuracy. It  is  important  that  specific  noise  test  codes  for  vari- ous  types  of  equipment  be  established  and  used  in accordance  with  this  International  Standard.  For  each type  of  equipment,  such  noise  test  codes  will  give detailed  requirements  on  mounting,  loading  and  op- erating  conditions  for  the  equipment  under  test  as well  as  a  selection  of  the  measurement  surface  and the  microphone  array  as  specified  in  this  International Standard.
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