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扩散声场中测量声压应选用什么型号的测量电容传声器(后面简称电容传声器)极其重要。在高频段,用各种不同型号电容传声器测得的同频段、同一点的声压级差值可达5～6dB。而目前,国内涉及混响室中声压测试的某些标准,或没有提及应该用的传声器型号,或规定不当。本文想就这个问题,从声场型和声压型电容传声器的概念着手,根据扩散场响应(或称无规入射声场响应)的定义,来加以阐明,并用实验进行验证,得出相应的结论。
Diffusion sound field measurement of sound pressure should be selected what type of measurement capacitance microphone (hereinafter referred to as condenser microphone) is extremely important. In the high frequency band, with a variety of different types of condenser microphone measured in the same frequency range, the same point of sound pressure level difference of up to 5 ~ 6dB. At present, some domestic standards related to sound pressure testing in reverberation chambers are not mentioned or the microphone models should be used, or the regulations are not properly specified. This article would like to address this issue, starting from the concept of sound field and sound pressure type condenser microphones, according to the definition of diffusion field response (or random incident sound field response) to be clarified and verified by experiments to draw the corresponding conclusions.