介绍一种新的压缩机噪声声功率的室内测量方法。首先解释ISO-3744最新标准中对要实现工程等级精度2级的声学测量的声学环境要求，然后介绍一个估算室内环境修正因子K2的方法，并估算出其K2值。应用该标准附录F中的半球6点测量法，在一间待改进的房间内实际测量K2，从而得出估算值与实测值的差异，接着尝试在房间的不同部位覆盖吸声海绵用于降低墙面反射，并估算改进后房间的K2值。最后通过实测，得出在房间所有的墙面上都覆盖吸声海绵是可以满足K2要求的结论。该改进后的房间还可以适用于满足欧盟2000/14/EC指令的压缩机声功率的室内测量。%A new method for indoor measurement of compressor’s sound power level was introduced based on the latest standard ISO 3744. First of all, the acoustic environment requirement for measurement precision of grade 2 was explained according to the standard. Then, a method for evaluation of indoor environment correction factor K2 was introduced. The hemisphere measurement method with 6 measurement points introduced in Appendix F of the standard was applied to measure the factor K2 of a room. Afterwards, the difference between the estimated K2 and measured K2 was obtained. Finally, the wall of this room was covered by foams to reduce the sound reflection of the wall surface, and the factor K2 was estimated and measured again. The results show that the factor K2 of the room with covering foams on all the walls can meet the requirement in the latest standard. This improved room can also meet the requirement of indoor sound power measurement prescribed in European Directive 2000/14/EC.
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