数字式声强计的研制

Development of Digital Sound Intensity Meter

本文讨论和分析了双传声器声强法的原理和测量误差,按照工程级的要求设计和研制了数字式声强计,包括声强探头,放大电路,滤波器,单片微机系统,数据处理和数字显示等。并对该声强计的性能进行了测试,分析和讨论。

The principle and measuring errors of the two-microphone sound intensity method are analysed and discussed. The digital sound intensity meter is designed and developed according to the requirement of the engineering scale, which includes the sound intensity probe, amplifying circuit, filter,single-chip microprocessor,data processing and digital display etc.Its characteristics are measured,analyzed and discussed.