当我们漫步于密林小道时,常感到悄无声息、心旷神怡;而当我们走近工厂的机房时,却感到震耳欲聋、心烦意乱.为什么呢?原来这与噪声有关. 从物理学的角度看,噪声是指发声体做无规则振动时发出的声音;但是从环境保护的角度看,凡是妨碍人们正常休息、学习和工作的声音,以及对人们要听的声音起干扰作用的声音,都属于噪声. When we walk through the jungle trails, we often feel quiet and relaxed; and when we approach the factory room, we feel deafening and upset. Why? It turns out that this is related to noise. From a physics point of view, Noise refers to the sound produced when the sounding body makes irregular vibrations; but from the perspective of environmental protection, sounds that impede people’s normal rest, study, and work, as well as sounds that interfere with the sounds that people want to hear, are noises. .