Noise Pollution (Proprietary Product of Realco,India)

About Noise Noise is unwanted sound Sound is the quickly varying pressure wave traveling through a medium. When sound travels through air, the atmospheric pressure varies periodically. The number of pressure variations per second is called the frequency of sound, and is measured in Hertz (Hz) which is defined as cycles per second Noise intensity is measured in decibel units. The decibel scale is logarithmic; each 10-decibel increase represents a tenfold increase in noise intensity. Human perception of loudness also conforms to a logarithmic scale; A 10-decibel increase is perceived as roughly a doubling of loudness. Thus, 30 decibels is 10 times more intense than 20 decibels and sounds twice as loud; 40 decibels is 100 times more intense than 20 and sounds 4 times as loud; 80 decibels is 1 million times more intense than 20 and sounds 64 times as loud.

Physics Of Hearing Hearing is a complex process that involves many parts of the ear working together to convert sound waves into information that the brain understands and interprets as sound.

NOISE POLLUTION Sound that is unwanted or disrupts one’s quality of life is called as noise. When there is lot of noise in the environment, it is termed as noise pollution. Sound becomes undesirable when it disturbs the normal activities such as working, sleeping, and during conversations. It is an underrated environmental problem because of the fact that we can’t see, smell, or taste it. World Health Organization stated that “Noise must be recognized as a major threat to human well-being”

Sources of Noise Pollution Transportation systems are the main source of noise pollution in urban areas. Industrial noise also adds to the already unfavorable state of noise Pollution. Boilers, Generators, Pneumatic equipment, Air conditioners, Pump, Fans, Turbines, Machines add to the existing noise pollution. Construction of buildings, highways, and streets cause a lot of noise, due to the usage of Air compressors, Bulldozers, Loaders, Dump Trucks, and Pavement breakers.

EFFECTS OF NOISE

Effects of Noise Pollution Hearing Loss,Productivity loss High Blood Pressure/Hypertension Stress Related illness,Insomnia Labored breathing,Altered brain chemistry Permanent damage in voice Sleep Disturbances,Color Blindness It can also cause memory loss/Forgetfulness Severe depression and Panic attacks Damage Physiological and Psychological health. Annoyance and Aggression,Tinnitus Miscarriages and abortions in women According to the EPA India, there are direct links between noise and health. Also, noise pollution adversely affects the lives of millions of people.

Effects of Noise Pollution

EFFECT ON VEGETATION,POOR QUALITY OF CROPS Now is well known to all that plants are similar to human being. They are also as sensitive as man. There should be cool & peaceful environment for their better growth. Noise pollution causes poor quality of crops in a pleasant atmosphere.

Effect on Animals Noise pollution damages the nervous system of animal. Altering Prey/predator detection Creates problems in Navigation Animal looses the control of its mind.They become dangerous and Attacking. Raise Metabolism Reduction of useable Habitat Death of Certain Species Genetic and Evolutionary Problems High noise levels may interfere with the natural cycles of animals, including feeding behavior, breeding rituals and migration paths.

Effect on Animals

Effects on Non-living things Causes cracks in Structure Loud noise is very dangerous to buildings, bridges,Stones,Earth,Land and monuments. It creates waves which struck the walls and put the building in danger condition. Breaking of Glass, China clay, mud vessels due to sudden loud noise Damage to furniture – ages faster Damage to paintings and antique pieces

Dangerous Noise Levels In general, noise levels below 85 dBA (decibels) are considered safe, while anything above 85 dBA will cause hearing loss. According to the Center for Hearing and Communication, the volume (dBA) and the length of exposure to the sound will tell you how harmful the noise is. The louder the noise, the less time required before hearing loss will occur. For reference, 0 decibels is the softest sound a person can hear with normal hearing, while 10 dBA is regular breathing. Rainfall is 50 decibels, while a normal conversation is 60. Beyond the level of safety at 110 would include something like shouting in someone's ear or thunder at 120 decibels. Want to know more? See the following chart for an inclusive list.

HomeWorkRecreation 50 refrigerator 50 – 60 electric toothbrush 50 – 75 washing machine 50 – 75 air conditioner 50 – 80 electric shaver 55 coffee percolator 55 – 70 dishwasher 60 sewing machine 60 – 85 vacuum cleaner 60 – 95 hair dryer 65 – 80 alarm clock 70 TV audio 70 – 80 coffee grinder 70 – 95 garbage disposal 75 – 85 flush toilet 80 pop-up toaster 80 doorbell 80 ringing telephone 80 whistling kettle 80 – 90 food mixer or processor 80 – 90 blender 80 – 95 garbage disposal 110 baby crying 110 squeaky toy held close to the ear 135 noisy squeeze toys 40 quiet office, library 50 large office 65 – 95 power lawn mower 80 manual machine, tools 85 handsaw 90 tractor 90 – 115 subway 95 electric drill 100 factory machinery 100 woodworking class 105 snow blower 110 power saw 110 leaf blower 120 chain saw, hammer on nail 120 pneumatic drills, heavy machine 120 jet plane (at ramp) 120 ambulance siren 125 chain saw 130 jackhammer, power drill 130 air raid 130 percussion section at symphony 140 airplane taking off 150 jet engine taking off 150 artillery fire at 500 feet 180 rocket launching from pad 40 quiet residential area 70 freeway traffic 85 heavy traffic, noisy restaurant 90 truck, shouted conversation 95 – 110 motorcycle 100 snowmobile 100 school dance, boom box 110 disco 110 busy video arcade 110 symphony concert 110 car horn rock concert 112 personal cassette player on high 117 football game (stadium) 120 band concert 125 auto stereo (factory installed) 130 stock car races 143 bicycle horn 150 firecracker 156 cap gun 157 balloon pop 162 fireworks (at 3 feet) 163 rifle 166 handgun 170 shotgun Decibel Levels of Common Noise Sources

Sound pressure for known sounds

Decibel Comparison Chart

Noise permissible standards Category of Area/ZoneLimits of dB Day TimeNight time Industrial Area7570 Commercial area6555 Residential area5545 Silence zone5040 The Central Pollution Control Board Permissible limit Noise standards for automobiles Category of VehicleLimit in dB Motorcycle, scooters and three wheelers.80 Passenger Cars82 Passenger or commercial vehicles up to 4 MT85 Passenger or commercial vehicles above 4 MT and up to 12 MT89 Passenger or commercial vehicles exceeding 12 M91 Noise standards for Domestic Appliances/ Construction Equipments Category of Domestic Appliances/ Construction EquipmentsLimit in dB Window air conditioners of 1 tonne to 1.5 tonne68 Air Coolers60 Refrigerators46 Diesel Generator for domestic purposes85-90 Compactors(rollers),Front loaders, Concrete mixers, Cranes (movable), Vibrators and Saws 75

GUIDELINES SUGGESTED BY OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION (OSHA) FOR INDUSTRIAL NOISE EXPOSURE Level Exposure Duration (Hrs.) Maximum Allowable Level dB (A) <

Solutions/Remedies for Noise Pollution Planting bushes and trees in and around sound generating sources is an effective solution for noise pollution. Urban Planning, Public Education and Awareness. Regular servicing and tuning of automobiles/ machinery can effectively reduce the noise pollution. Alteration of roadway surface texture. Buildings can be designed with suitable noise absorbing material for the walls, windows, and ceilings. Soundproof doors and windows can be installed to block unwanted noise from outside. Factories and industries should be located far from the residential areas. Workers should be provided with equipments such as ear plugs and earmuffs for hearing protection. Control in the Transmission Path, Control at Source, Control over Vibrations. Exposure Reduction Enclosure of machines can reduce noise levels at its source very effectively. Leakage where pipes pass through walls as well as acoustic leaks between walls, screens or enclosures, can produce large variations in the attenuation achieved. It is therefore important to seal air gaps carefully Putting major noise sources at one place & separating it from quieter area. Using acoustic barriers, sound absorbing linings & sound insulating partitions. Complete or partial enclosure of noisy equipment. Providing silencers on the intake as well as exhaust side of flow machines like blowers, fans etc. Insertion of damping material between machine bases and foundations and use of anti vibration mountings. Regulations should be imposed to restrict the usage of play loudspeakers in crowded areas and public places. International Co-operation

Solutions/Remedies for Noise Pollution

Master of Silence

Conclusion… To protect healthy life, there is an urgent need to come up with an enforceable law on Noise Pollution in each Location. THANK YOU…………. PPT Prepared By Dr.Hrutuja R.Ghone & Mr.Ameya G.Ghone 1000 more PPT Please visit