世界上每年火灾的死亡人数上万人,财产的损失达几亿美元。仅在美国,一年的死亡人数就达六千人,按人口计算是大多数工业发达国家的两倍。为减少死亡人数,使消防人员的工作更安全,很多新技术已被应用。 **刺耳的报警声可以使步行者震耳欲聋。这种噪音可能使经常工作在这种情况下的消防人员致聋。为了保护消防人员免遭噪音的侵害,佛罗里达的一家公司已经采用一种叫吸音 The world’s annual death toll of fire thousands of people, the loss of hundreds of millions of dollars in property. In the United States alone, the death toll in a year amounts to 6,000, twice the population of most industrialized countries. In order to reduce the death toll and make the work of firefighters safer, many new technologies have been applied. ** Harsh alarm sounds can make Pacers deafening. Such noise may deaf people who work on fire in such situations. To protect firefighters from noise, a company in Florida has adopted a technology called sound-absorbing