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声音能传递很多信息,并丰富和改善着我们的生活。但是,有些声音是有害的,需要加以控制和消除,这种要被控制和消除的声音就是噪声。噪声污染与水、空气、垃圾污染一样,也是环境污染的一部分。在1979年,联合国召开了世界环境保护大会,将噪声列为人类最不可容忍的灾难之一。防治噪声有很多种方法,其中“隔声”是控制噪声污染的重要方法之一。在学习完噪声的有关知识后,爱思考的张帆和姚琳两位同学决定探究一下不同材料的隔音性能。
Sound can convey a lot of information and enrich and improve our lives. However, some voices are harmful and need to be controlled and eliminated. Such voices to be controlled and eliminated are noises. Noise pollution, like water, air and garbage pollution, is also a part of environmental pollution. In 1979, the United Nations convened the World Conference on Environmental Protection, making noise one of the most intolerable disasters of mankind. There are many ways to control noise, including “sound insulation” is one of the important ways to control noise pollution. After learning the relevant knowledge of noise, Zhang Fan and Yao Lin, two lovers who think about love, decided to explore the sound insulation performance of different materials.