声学性能主观评价用声学环境室的设计

Design of acoustic environment room for subjective evaluation of acoustic performance

由于各类音响的客观声学技术指标和主观听觉之间还不能完全对应,机器噪声的客观测试指标和人的主观感觉之间也还有一定的差异。因此,实际利用人耳对音响和噪声源的测听成为了对音响系统以及噪声源进行评价的有效方法。因为测听结果强烈地依赖于所处环境,因此,理想的测听环境——测听室成为了主观评价必备设施之一。本文论述了音响测评室的设计过程,包括隔声、消声、混响时间,隔振的设计计算过程。同时列出了测听室完工后实际性能的测试结果,并与设计计算的数据进行比对。测试表明,本设计采用的计算方法完全达到了测听室性能标准的要求。

Objective acoustic specifications and subjective hearing of various sound can not fully correspond.There are also some differences between Objective testing of the machine noise indicators and subjective impression.Thus,using ear for sound and noise source measurement becomes Effective way to evaluate the sound system as well as the noise source.Because the audiometry results strongly depend on the environment,therefore,the ideal test environment-subjective assessment of the test room became one of the necessary facilities.This paper discusses the design process of the Faw car's acoustic measurement room,including sound isolation,noise,reverberation time,process design and calculation of vibration.Also lists actual performance test results after completion of the test room,as designed and calculated data.Tests have shown that calculation method used in this design completely meets the requirements of test performance criteria.