论文部分内容阅读
通常我们称一部机器或一群机组在连续工作时所产生的噪声为稳态噪声。因为它的声级虽随时间有所涨落,其分贝值的波动一般不会很大。但是对于交通噪声或港区作业噪声来说,情况往往就比较复杂了。当车辆弛越时、船舶鸣笛时或吊机承受负荷作功时,环境噪声常随之激增,而在这一切工况瞬间结束后,环境又将显得比较的平静,因此我们一般称这样的环境噪声为非稳态环境噪声。 从实际经验出发,如果在某一非稳态环境下所测得的声级分布是单峰正态,则声级的等效处理工作一般是较容易的。但如果分布是双峰,那问题就要复杂得多,而对于包含有突发
Usually we call a machine or a group of units in the continuous work of the noise generated by the steady-state noise. Because its sound level fluctuates over time, its decibel value fluctuations are generally not large. However, the situation is often complicated by traffic noise or port noise. When the vehicle is over, when the ship whistles or cranes to withstand the load of work, the ambient noise often increases sharply, and after all these conditions in an instant, the environment will appear more calm, so we generally call such Environmental noise is unsteady environmental noise. Based on practical experience, if the sound level distribution measured in a non-steady-state environment is unimodal normal, the equivalent sound level processing is generally easier. But if the distribution is bimodal, then the problem is much more complicated, and for bursts included