Motivationo Concerns about the Asia’s noise epidemico Unbearable cause of harming the hearing and health of the people
What is noise?In simple terms, noise isunwanted sound.Sound is a form ofenergy which is emittedby a vibrating body andon reaching the earcauses the sensation ofhearing through nerves.
A noise problem generally consists of three inter-related elements-• the source,• the receiver and• the transmission path.
Noise measurementThe intensity ofsound is measured insound pressure levels(SPL) and commonunit ofmeasurement isdecibel, dB.
World health Organization Safe limit noise level: 70 decibels (dBA)
An approximate guide to decibel level safety:150-160 = Eardrum rupture140 = Aircraft carrier deck.130 = Jet take-off (100 meters), gun blast at close range.120 = Human pain threshold, loud rock concert.110 = Serious hearing damage if sustained for more than 1 hour.100 = Serious hearing damage if sustained for more than 8 hours.90 = Likely hearing damage if sustained for more than 8 hours.80 = Potential but unlikely hearing damage if sustained for more than 8 hours.70 = Just annoying, but probably safe.60 = Typical conversational volume.50 = A quiet, library conversation.40 = A whisper.30 = Barely audible sound.20 = Threshold of human hearing.
There are a variety of noises that can be classed as a nuisance1. Domestic Noise2. Barking Dogs3. Entertainment Noise from Pubs and Clubs4. Noise from Industrial or Commercial Premises5. Noise from Construction and Demolition Sites6. Noise from DIY Activities7. Intruder Alarms8. Fireworks
“Of all their senses, sound is the one on which they rely on most. An increasing amount of noise pollution in their environment can have a major, and even fatal, impact on the animals.”
AnnoyancePhysiological effectsLoss of hearingHuman performanceNervous systemSleeplessnessDamage to material
So Keep it Down AlreadyHong Kong – they have installed barriers and screens along new roads but there are still 655 roads that generate noises greater than 70 dBAThailand - Quiet Bangkok Club to pressure the government to reduce noise pollution
New South Wales, Australia- a ban was made in 2008 to disable households to use domestic air conditioners at night as a solution to reduce noise.
The following steps can be taken by the authorities concerned for the betterment of the countrymen especially the city dwellers:• Make people aware of the effects of noise• Stop horn of vehicles on the city streets• Ban the hydraulic horns of vehicles like those used by some bus, trucks etc.• Ban private use of loud speakers, mikes etc., e.g., in election campaigns or other publicity
SummaryWhether knowingly or unknowingly, everyone of uscontribute to noise pollution.Identify the sources of noise pollution.Efforts shall be made to reduce the undesired noiselevels from (unwanted) noise generating sources.
It is high time that everyone should do this bitin curbing the noise pollution, which isotherwise becoming as effective as SLOWPOISONING.