WHAT IS NOISE POLLUTION?WHAT IS NOISE POLLUTION?

Noise pollutionNoise pollution (or (or environmental environmental noisenoise ) is displeasing human, animal or ) is displeasing human, animal or machine created sound that disrupts the machine created sound that disrupts the

activity or balance of human or animal life. activity or balance of human or animal life. The word The word noisenoise comes from the Latin word comes from the Latin word

nauseanausea meaning seasickness.meaning seasickness.

IT’S SOURCES

The sour ce of most out door noise wor ldwide is: • Tr anspor t at ion Syst ems: mot or vehicle noise, • air cr af t noise and r ail noise. • Poor ur ban planning may give r ise t o noise

pollut ion.• Ot her sour ces: of indoor and out door noise

pollut ion ar e car alar ms, emer gency ser vice sir ens, of f ice equipment , f act or y machiner y, const r uct ion wor k, gr ounds keeping equipment , bar king dogs, appliances, power t ools, light ing hum, audio ent er t ainment syst ems, loudspeaker s, and noisy people.

MEASUREMENT A DECIBEL is the standard for the

measurement of noise. The zero on a decibel scale is at the threshold of hearing. 20 db is whisper, 40 db the noise in a quiet office . 60 db is normal conversation, 80 db is the level at which sound becomes physically painful.

• The Noise quantum of some of the cities in our country indicate their pitch in decibel

in the nosiest areas of corresponding cities, e.g. Delhi- 80 db, Kolkata - 87,Bombay-85,

Chennai-89 db etc.

Human Health Effects

Noise health effects are both health and behavioral in nature. The unwanted sound is cal led noise. This unwanted sound can damage physiological and psychological health. Noise pollution can cause:

• Annoyance and aggression: behavioural changes

• Hypertension: health problems• High stress levels: health problems • Tinnitus: forgetfulness,serve depression

and panic attacks

HUMAN HEALTH EFFECTS(contd.)

• Chronic exposure: hearing loss • Sleep disturbances and other harmful

effects. • Cardiovascular effects • Statistical rise in blood pressure • Vasoconstriction leading to the increased

blood pressure • Increased incidence of coronary artery

disease.

Environmental Ef fects Noise can have a detrimental effect on

animals:• By causing stress.• Increasing risk of death by changing

the delicate balance in predator/prey detection and avoidance.

• By interfering with their use of sounds in communication especially in relation to reproduction and in navigation.

• Acoustic overexposure can lead to temporary or permanent loss of hearing.

• May cause endangered species to become extinct. One of the best known cases of damage caused by noise pollution is the death of certain species of beached whales, brought on by the loud sound of military sonar.

Mitigation

the sound tube in Melbourne, australia, is designed to reduce

roadway noise without detracting froM the area's aesthetics.

Noise Control Technology to mitigate or remove noise can be applied as follows:

• There are a variety of strategies for mitigating roadway noise including:

• Use of noise barriers, limitation of vehicle speeds• Alteration of roadway surface texture

• Limitation of heavy vehicles• Use of traffic controls that smooth vehicle flow to reduce braking and

acceleration• Tire design.

• Costs of building-in mitigation can be modest, provided these solutions are sought in the planning stage of a roadway project.

NNOISE LAWSOISE LAWS

Noise laws and ordinances vary widely among Noise laws and ordinances vary widely among municipalities and indeed do not even exist in some municipalities and indeed do not even exist in some

cities. Many conflicts over noise pollution are cities. Many conflicts over noise pollution are handled by negotiation between the emitter and the handled by negotiation between the emitter and the

receiver. Escalation procedures vary by country, receiver. Escalation procedures vary by country, and may include action in conjunction with local and may include action in conjunction with local authorities, in particular the police. Noise pollution authorities, in particular the police. Noise pollution

often persists because only five to ten percent of often persists because only five to ten percent of people affected by noise will lodge a formal people affected by noise will lodge a formal

complaint. Many people are not aware of their legal complaint. Many people are not aware of their legal right to quiet and do not know how to register a right to quiet and do not know how to register a

complaint.complaint.

LASTWORDS There i s need to c reat ing general awarenes s towards

the hazardous e f fe c t s o f no i se po l lu t ion. Part i cu lar ly , in our country the people general ly lack consc iousnes s o f the i l l e f f e c t s which no i se po l lu t ion create s ad how

the soc i e ty inc luding they themse lve s s tand to benef i c iary prevent ing generat ion and emis s ion of

no i se po l lu t ion. The targe t area shou ld be educat ional ins t i tu t ions and more part i cu lar ly schoo l . The young ch i ldren of impre s s ionable age shou ld be mot ivated to

de s i s t f rom p laying wi th f i recrackers , u se o f h igh sound produc ing equ ipment s and ins trument s on

fe s t iva l s , r e l ig ious and soc ia l funct ions , fami ly ge t-toge thers and ce l ebrat ions e t c . which cause no i se

po l lu t ion.

Made By-Made By- Somya TyagiSomya Tyagi Viii NishaatViii Nishaat