一种能够消除汽车刹车时发出尖叫声的降制动噪声装置在北京市和海淀区科委的大力支持下,即将问世。噪声污染与水污染、大气污染被称为现代社会的三大公害。目前,水污染与大气污染的治理已取得相当的成效,而噪声污染则由于技术难度大,不易攻克,仍然困扰着人类。在都市的噪声污染 A kind of noise reduction device capable of eliminating the scream when the car brakes is released is under the great support of Beijing Science and Technology Commission and Haidian District Science and Technology Commission. Noise pollution and water pollution, air pollution is called the three major public hazards in modern society. At present, water pollution and air pollution control have achieved considerable success, and noise pollution due to technical difficulties, difficult to overcome, still plagued humans. Noise pollution in the city