由于车间80％的设备装有气动夹具,车间噪音极大,单台测定达110分贝(A),相邻两、三台机床产生的噪音,按声压级定义计算,其合成声压级分别达113分贝(A)和114.5分贝(A),严重影响工人健康。为治理噪声污染,我们分析了噪声来源,主要来自三个方面。首先是气体动力噪声,即气动夹具换气阀排气口的激发声波发出的噪声,呈现作稳定性的脉冲噪声性质(图la)。其次是电机运转中的噪声,呈稳 80% of the workshop equipment pneumatic clamp, the workshop noise, a single determination of up to 110 decibels (A), adjacent two or three machine noise, according to the definition of sound pressure level, the sound pressure level of their synthesis Reaching 113 dB (A) and 114.5 dB (A), seriously affecting workers’ health. To control noise pollution, we analyzed the sources of noise, mainly from three aspects. The first is the aerodynamic noise, which is the noise emitted by the excitation sound wave from the exhaust port of the pneumatic gripper valve, showing the impulse noise nature of stability (Figure 1a). Followed by the noise of the motor running, was steady