全世界每年有数万人死于火灾,数十亿美元财产被烧毁。仅在美国,每年就有6000人被大火夺去生命。为了减少伤亡并使消防工作更加安全,目前许多国家研制了大量新的消防器材。隔音消防车震耳欲聋的火警声似以告诫人们发生了火警,实际上对消防员同样是一种十分严重的噪声干扰,为了使消防队员免受噪声干扰的折磨,美国佛罗里达州 Tens of thousands of people die of fire every year in the world and billions of dollars of property have been destroyed. In the United States alone, 6,000 people are killed by fire every year. In order to reduce the casualties and make the fire safety work, many countries have developed a large number of new fire-fighting equipment. The deafening noise of a fire-retardant fire engine sounds like a warning to people that a fire has actually taken place. Firefighters are in fact a very serious noise disturbance. To keep firefighters from the noise, Florida