Noise Pollution : Noise Pollution What is noise?
In simple terms, noise is unwanted sound.
Sound is a form of energy which is emitted by a vibrating body and on reaching the ear causes the sensation of hearing through nerves. Slide 2: A noise problem generally consists of three inter-related elements-
the receiver and
the transmission path. Slide 3: Noise may be continuous or intermittent.
Noise may be of high frequency or of low
frequency which is undesired for a normal hearing. Slide 4: The differentiation between sound and noise also depends upon
the habit and interest of the person/species
the ambient conditions
impact of the sound Noise measurement : Noise measurement The intensity of sound is measured in sound pressure levels (SPL) and common unit of
measurement is decibel, dB. Sources of noise : Sources of noise domestic (movement of utensils, cutting and peeling of fruits/vegetables etc.) Natural (shores, birds/animal shouts, wind movement, sea tide movement, water falls etc.), : Natural (shores, birds/animal shouts, wind movement, sea tide movement, water falls etc.), Commercial (vendor shouts, automobiles, aeroplanes, marriages, laboratory, machinery etc.) : Commercial (vendor shouts, automobiles, aeroplanes, marriages, laboratory, machinery etc.) Industrial (generator sets, boilers, plant operations, trolley movement, transport vehicles, pumps, motors etc.) : Industrial (generator sets, boilers, plant operations, trolley movement, transport vehicles, pumps, motors etc.) Impacts of noise : Impacts of noise Why bother about noise? Slide 11: Annoyance
Loss of hearing
Damage to material Control of Noise Pollution : Control of Noise Pollution The techniques employed for noise control can be broadly classified as
Control at source
Control in the transmission path
Using protective equipment. Summary : Summary Whether knowingly or unknowingly, everyone of us contribute to noise pollution.
Identify the sources of noise pollution.
Efforts shall be made to reduce the undesired noise levels from (unwanted) noise generating sources. Slide 14: The public may complain to the statutory Board for violation of noise level limits by any noise generator. Slide 15: It is high time that everyone should do this bit in curbing the noise pollution, which is otherwise becoming as effective as SLOW POISONING. Source: : Source: http://discovery.bits-pilani.ac.in/dlpd/courses/coursecontent/courseMaterial%5Cetzc362%5CNoice_Pollution_notes.pdf