声音是我们能够听到的一种机械振动在空气或其它弹性媒质中进行传播的波,这个波叫声波。频率在20～2万赫范围的声波作用到人耳就产生了声音的感觉。噪声是一种不悦耳的,扰乱听觉,破坏安静环境的声音。从物理学观点来讲,它是许多不同频率(音调)和不同声强(能量)的声音无规律的杂乱组合;从心理学观点来讲,凡是使人烦噪、讨厌、不需要的声音都是噪声。 Sound is a kind of we can hear a mechanical vibration in the air or other elastic medium to carry out the wave, the wave called the sound wave. The frequency of 20 to 2 hertz range of sound waves to the human ear to produce the feeling of sound. Noise is an unpleasant sound that disrupts hearing and destroys the quiet environment. From a physical point of view, it is a messy combination of sounds of many different frequencies (tones) and different sound intensities (energies); from a psychological point of view, all annoying, annoying, unwanted voices Is noise.