DIN EN ISO 3743-1:2009 PDF

Scope: This part of ISO 3743 specifies a relatively simple en- gineering method for determining the sound power levels of small, movable noise sources. The measurements are carried out when the source is in- stalled in a hard-walled test room. A comparison method is used to determine to the octave-band sound power levels of the source. The spatial average (octave-band) sound pressure levels produced by the source under test are compared to the spatial average (octave-band) sound pressure levels produced by a reference sound source of known sound power out- put. The difference in sound pressure levels is equal to the difference in sound power levels if conditions are the same for both sets of measurements. The A-weighted sound power level is then calculated from the octave-band sound power levels. NOTE 1 Precision methods for the determination of sound power levels of small noise sources are specified in ISO 3741 and ISO 3745

DIN EN ISO 3743-1:2009 history

2011 DIN EN ISO 3743-1:2011-01 Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Engineering methods for small, movable sources in reverberant fields - Part 1: Comparison method for a hard-walled test room (ISO 3743-1:201...
2009 DIN EN ISO 3743-1:2009 Acoustics - Determination of sound power levels of noise sources - Engineering methods for small, movable sources in reverberant fields - Part 1: Comparison method for hard-walled test rooms (ISO 3743-1:1994); English version of DIN EN ISO 3743-1:2009-11
1995 DIN EN ISO 3743-1:1995 Acoustics Determination of the sound power levels of noise sources D | N Methods of accuracy class 2 for small, transportable sources in hail fields – Part 1: Comparative methods in test chambers with reverberant walls