论证了现行ＪＢ／ＴＱｈ３４１－８４部颁标准中用比Ａ声级限值来判定轴流通风机噪声特性的不准确性，并提出了Ａ声级限值标准及对高压大流量轴流通风机应采取的降噪措施。

The limited Value of specific A-weighted sound level in the present standard JB/TQh341-84 promulgated by the Ministry,which is applied to determine the unaccuracy of noise characteristics for axial-flow ven tilators has been discussed,Simultaneously a measure that should badopted to reduce the noise of high-pressure&great-flow axial flow ven tilators and a limited standard value for A-weighted Sound level have been also presented,This can not only keep the noise of ventilators up to A-weighted sound level.but also can decrcase the noise of ventilators properly. Purthermore this can make the noise standard for axlal flow ventilators be more scientific and more practica ble.

TH43 TB53