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1.前言声强和声压是声学中的重要物理量,传统的声学测试中都是先测出声压,然后由声压计算出其它物理量。用声压法进行声源的声功率测定时要求有一个特定的声学环境,而采用声强法进行测试时,可以在现场条件下比较精确地测出声源的声功率。声强的测量方法早在四十年前就有人研究,并且制造出了声强仪。六十年代中期,美国提出了快速富利哀变换(FFT)技术,之后各种FFT分析仪相继问世,推动了声强测试技
1. INTRODUCTION Sound intensity and sound pressure are important physical quantities in acoustics. In traditional acoustic tests, sound pressure is first measured, and then other physical quantities are calculated by sound pressure. When using sound pressure method to measure sound power of sound source, it requires a specific acoustic environment. When using sound intensity method to test, sound power of sound source can be measured more accurately under the field conditions. Sound intensity measurement methods were studied as early as 40 years ago, and the sound intensity meter was manufactured. In the mid-1960s, the United States put forward Fast Fourier Transform (FFT) technology, after which various FFT analyzers came out one after another to promote the sound intensity test