交通噪声模型试验新方法

交通噪声源接近于有限长离散线声源，以往的模型试验多采用气流声源来实现。本提出了用扬声器来模拟的新方法，实验中解决了扬声器的指向性、灵敏度的一致性以及离散源之间的相干性等问题后，获得一种较为简便的离散线声源模拟方法。

A NEW METHOD OF MODEL EXPERIMENTS ON TRAFFIC NOISE

The traffic noise source is similar to the finite discrete line.source. In the past, the discrete source was always simulated by the air flow noise in the laboratory. This paper presents a new simulating method,which applies the loudspeakers to constitute the radiating units of the discrete line source. For realizing this method,some problems, such as the omnidirectional characteristic at high frequencies,the uniformity of the sensitivity, and the non-interference of the discrete sources are solved. This is a simpler and more convenient simulating method.