噪声源声功率级的半消声室测量方法研究

噪声源声功率级半消声室测量方法已有相应的测量标准，但近年来的研究表明，它是不完善的。本文在半消声室纯音声场研究基础上，探讨了声波干涉对声功率级测量的影响。介绍了利用宽频标准噪声源进行的半消声室与消声室以及声源高度变化时的对比测量。研究结论对于完善测量标准，指导实际测量工作有一定意义。

Study on the determ ination ofsound pow er levels ofnoise sources for sem i-anechoic room

The determ ination ofSPL(sound pow erlevels) ofnoisesourcesfor sem i-anechoic room hasal- ready had a standard,butresearch on itin the lastfew years hasproved the standard is no perfectly.This pa- per investigates the effectofacousticalinterference upon the determ ination of SPLon the basis ofthe study on pure tone field in sem i-anechoic room ,presents som e results for com parative m easurem ents ofSPLnotin anechoic and sem i-anechoic room s but in low er and higher positions ofnoise sources.This study w illplay a role in both perfecting standard and directing practicaldeterm ination ofSPL.