1、nIn 1981,300 audience lost consciousness and coma at modern open-air music held in the United States.nIn 1959,the United States,there are 10 voluntarily making noise test,when the experimental aircraft from flying over 10 volunteers 10-12 meters high,six people died on the spot.nIn 1960,the Japanese
2、 city of Hiroshima,a man was tortured by the noise from the nearby factory.He killed factory owners finally.The noise is so The noise is so terrible!terrible!Noise makes Noise makes people angry.people angry.一.About the voicenSound,a manifestation of vibration,travels in wave patterns through solids
3、,liquids and gases.n声音,振动表现,通过固体、液体和气体沿波模式振动。Sound wavesAmplitude and wavelength振幅和波长People generally hear sounds People generally hear sounds between the“threshold of between the“threshold of hearing”and the“threshold of hearing”and the“threshold of pain”.pain”.In terms of pressure,this is 20 In te
4、rms of pressure,this is 20 PaPa 100 Pa.100 Pa.The decibel scale was developed The decibel scale was developed from this fact and makes numbers from this fact and makes numbers more manageable.more manageable.The decibel scale generally The decibel scale generally ranges from approximately 0 to range
5、s from approximately 0 to 130.130.Sound and human hearingThe voice people dont need and Interfere with peoples normal life,work and rest is referred to as NOISE.Noise cause adverse effects on the surrounding environment.This kind of situation is called noise pollution.二二.About the noise.About the no
6、ise1.The definition of noise1.The definition of noise 2.The2.The characteristics of the noisecharacteristics of the noiseuNoise is among the most pervasive pollutants today uNoise is unavoidable for many machinesuWe experience noise in a number of waysenvironmental cause and victim generated by othe
7、rs“second-hand”uNoise negatively affects human health and well-being uThe air into which second-hand noise is emitted and on which it travels is a commons“.Noise is among the most pervasive pollutants today.nWhat are the noise pollution in daily life.nMechanical noise(机械噪声)nGas noise（气体噪声）nThe elect
8、ric magnetic noise（电磁性噪声）3.The types of noise3.The types of noiseThe most harmful noise in daily life is Mechanical noise(机械噪声).The most common are The factory machinery and Traffic noise.Factory machineryTraffic noiseConstruction noiseNoise pollution has become the second to the air pollution in th
9、e environment risk factors.What are the harm of noise?What are the implications for human?三.The harm of noisenDamaging hearing,affect work,study,rest and sleep.nCausing disease,affect human body health.nThe service life of the machinery and equipment can be affected by strong noise,The growth of pla
10、nts and animals are damaged.Strong noise will Strong noise will take away your take away your“ears”!“ears”!四.Prevention and control of noiseFor noise regulation,a lot of measures to be adopted.In view of the construction and the factory has introduced some policies,management and supervision system
11、is established.nPublic security department supervise and manage the traffic noise,noise of social activities.nRailway departments supervise and manage the station using the horn and the train running noise.1.Measures for the prevention and 1.Measures for the prevention and control of industrial nois
12、e control of industrial noise pollutionpollution The noise pollution of industrial enterprises should take measures to reduce the impact on the surrounding environment.Complying with the discharge standard of Industrial noise emissions within the city limits.2.The measures to prevent the 2.The measu
13、res to prevent the traffic noise pollutiontraffic noise pollution nIt is forbidden to manufacture,sell,excessive amounts of imported cars nDriving motor vehicles and vessels in the city should not be any installation and use of the alarm nDesignating roads and time for using motor vehiclesnAutomobil
14、e muffler(消声器)and the speaker should meet the requirements in the city limits.Strengthening the maintenance（维修保养）to prevent pollution.3.The Measures of public noise 3.The Measures of public noise pollution prevention and controlpollution prevention and controlnIn a public place,gathering,entertainme
15、nt use speakers that must be approved by the ministry of public security.nMeasures should be taken to avoid the impact on the residents when using electrical appliances,instruments,home entertainment,indoor decoration.nIt is prohibited to use loudspeakers in commercial activities.5.Taking some techniques to reduce the noise 五.My point of view about noise pollution nRiding a bike instead of driving.nDont use loudspeaker.nDont stay for a long time in the noisy place.nDont make a big noise in public.Team members:吴坤燃、王胜
