声强测量应用研究

The Application Study of Sound Intensity Measurements

声强测量是声学测量领域的一项新技术。本文研究了空气中声强测量的一般方法,通过对国产Yxx型飞机舱室的声强测量,对声强测量的优点及测量中应注意的问题做了分析。本文还给出了Yxx型飞机舱内部分位置的声强等值线图以及由声强分布解算出各表面辐射或吸收的声功率数值和声源与声汇的位置。

The sound intensity measurements,an advanced technique of acoustics measurements,are studied in this paper.The advantages and some cautions with sound intensity measurements are shown in the paper.In order to yield a true picture of sound intensity distribution the paper shows the general methods and gives an actual experiment of sound intensity measurement inside an aircraft of type Yxx.As sound intensity is the rate of flow of sound through a given area at right angles to the direction of flow, the picture of sound intensity inside the aircraft shown in this papar gives where energy flows out of the surface,i.e.sound source and where energy flows into the surface,i.e.sound sink.