DIN EN ISO 3743-1-2009 声学.声压法测定噪声源声功率级使用标准声源简易法.适用于在反射区域内的小型移动式目标源的工程方式.第1部分:适用于硬质墙壁测试室的比较方式(ISO 3743-1:1994),EN ISO 3743-1:2009的德文版本
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
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