噪音污染是现代城市最大的环境污染问题之一,城市居民的健康为此受到极大的影响。如何消除噪音,是科学家面临的一个重大课题。 最近,美国麻省有一批科学家提出了一个理论,认为要消灭噪音可采用“以毒攻毒”的方法,制造出一种振幅与某种噪音相同的声音,用它向该种噪声进行撞击,便能会使噪音消于无形。 提出这个理论的物理学家尼尔·希拔兹搏士,曾经做过一个试验,以证明他的理论正确可行。他把一副发出巨大低频振波的柴油发动机所发出的噪音,用一系列的声音感应仪加以测录,然后将噪音输入一个电脑之中,经过特别设计的电脑程序,把噪音加以分析,找出它准确的振幅。接着,利用几 Noise pollution is one of the largest environmental pollution problems in modern cities, and the health of urban residents is greatly affected by this. How to eliminate noise is a major issue for scientists. Recently, a group of scientists in Massachusetts proposed a theory that in order to eliminate noise, a method of “poisoning with poison” could be used to create a sound of the same amplitude as a certain kind of noise and use it to impact such noise Make the noise disappear. The physicist Neil Hibzi, who put forward this theory, has done a test to prove his theory is correct and feasible. He measured the noise emitted by a diesel engine emitting a large low-frequency vibration using a series of sound sensors and entered the noise in a specially designed computer program to analyze the noise and find Give it the exact amplitude. Then, use a few