Sources, Causes, Effects and Remedial Measures

7/23/2019 Sources, Causes, Effects and Remedial Measures

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Sources, causes, effects and remedial

measures of noise pollution.A BCEE presentation

By Piyush Hajare



WHAT IS NOISE ? In simple terms noise is an unwanted and

undesired sound .

Sound becomes undesirable when it disturbsthe normal activities such as workin!sleepin and durin conversations.

It is an underrated environmental problem

because o" the "act that we can#t see! smell!or taste it.

$orld Health %ranisation stated that &'oisemust be reconised as a major threat to

human well(bein.)



HOW IT IS COMPUTED ? *he intensity o" sound is computed in sound

pressure levels+SP,- and common unit o"measurement is dB i.e decibels.

I" sound levels are measured in terms o"pressure then the SP,+,p- is iven by!

,p /0lo+P1P0- dB ! where P0 is standard

re"erence pressure.



HOW LOUD IS TOO LOUD ?'oise (induced hearin damae is related to

the duration and volume o" e2posure.

3overnment research suests the sa"e

e2posure limit is 45 decibels "or eiht hours aday .



Some common decibel levels



SOURCES OF NOISE POLLUTION



WHERE DOES IT GENERATE FROM ?

SOURCES! *he sources o" noise may vary accordin to

daily activities as "ollows 6(

7omestic 8 9irin crackers!movement o"utensils! cuttin and peelin o" "ruits andveetables!etc.

'atural 8 Shores! shouts o" birds1animals! windmovements! sea tide movement! water "alls! etc

Commercial (Automobiles! aeroplanes!marriaes! laboratory!

machinery! etc.



WHERE DOES IT GENERATE FROM ?

SOURCES!

Industrial 8 3enerators! boilers! plant

operations! trolley movements! transportvehicles! pumps! motors! etc.

*he noise levels o" some o" the sources are

summarised in the table 6(



T"#ic$l Noise levels Source Noise level in

dB

Source Noise level in

dB

Air compressors :5(;0< =uiet 3arden >0

;;0 ?@A dieselenerator

:5 *ickin clock >0

,athe machine 4 Computerrooms

55(0

illin machine ;;/ *ypin institute 0

%2y(acetylenecuttin

: Printin press 40

Pulverisin :/ Sports car 40(:5

Divetin :5 *rains :

Portable saw ;04 *rucks :0(;00

Steam turbine

+;/!500 ?$ -

:; Car horns :0(;05

Pneumatic ;;4 et takeoF ;/0



E%%ec&s o% noise #oll'&ion



E%%ec&s o% noise #oll'&ion$hy bother about noiseG

%"ten nelected ! noise induces a severe impact onhumans and on livin oranisms.Some o" the

adverse eFects are summarised below 8

1. ANNOYANCE - 6 It creates annoyance to the receptorsdue to sound level uctuations. *he aperiodic sound

due to its irreular occurrences causes displeasure tohearin and causes annoyance.

2. PHYSIOLOGICAL EFFECTS - *he physioloical "eatureslike breathin amplitude! blood pressure! heart(beatrate! pulse rate! blood cholesterol are eFected.



>. LOSS OF HEARING - ,on e2posure to hih sound

levels cause loss o" hearin. *his is mostly unnoticed!but has an adverse impact on hearin "unction.

<. HUMAN PERFORMANCE - 6 *he workinper"ormance o" workers1human will be aFected as

theyll be losin their concentration.5. NERVOUS SYSTEM - It causes pain! rinin in theears! "eelin o" tiredness! thereby eFectin the"unctionin o" human system.

.SLEEPLESSNESS - It aFects the sleepin there byinducin the people to become restless and looseconcentration and presence o" mind durin theiractivities.



CONTROL OF NOISE POLLUTION7ue to the various adverse impacts o" noise

on humans and environment! noise should becontrolled. *he techniJue or the combinationo" techniJues to be employed "or noise controldepend upon the e2tent o" the noise reductionreJuired! nature o" the eJuipment used andthe economy aspects o" the available

techniJues.

*he various steps involved in the noise

manaement stratey is illustrated at 9i.



NOISE POLLUTION MANAGEMENT

STRATEG(. '%ISE

P%,,K*I%'

'%

DIS?

'%ISE HALAD7

L%'EDE7KCEE=. SP,

DE7KCE '%ISE,E@E,

DE7KCE EMP%SKDE *IE

'%ISEDE7KC

*I%' A*S%KDC

E

I'*EDDKP* *DA'SISS

I%' PA*H

IS%,A*EPEDS%'

PEDS%'A, EAD

PD%*EC*I%'

%BD%*A*I%'

%'I*%DI'3 AK7I%E*DN



CONTROL OF NOISE POLLUTION NOISE CONTROL AT SOURCE ( Deducin the noise

levels "rom domestic sectors! aintenance o" automobiles!Control over vibrations! ,ow voice speakin! Prohibition on

usae o" loud speakers! Selection o" machinery!aintenance o" machines!etc.

CONTROL IN TRANSMISSION PATH - Installation o"barriers! 7esin o" buildin! 3reen belt development!etc.

JOB ROTATION - By rotatin the job between the workers

workin at a particular noise source or isolatin a person!the adverse impacts can be reduced.

HEARING PROTECTION - An averae noise attenuationup to >/ dB can be achieved usin earmuFs! ear plus!etc.



CONTROL OF NOISE POLLUTION



THANK YOU !

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Sources, Causes, Effects and Remedial Measures