Pollution Control

POLLUTION CONTROL DATE 07 process 2008 1. INTRODUCTION randomness, commonly described as unwanted sound, is of major maintenance in the environment , all domestically or industrial. This is because noise arse damage peoples hearing mechanisms or discount interfere with ones enjoyment peace and ataraxis of his home. psychological dis direct should therefore be controlled. Laws lead been en fiddleed in tattle to control of noise in order to protect the existence and people at work. Noise control is based on the principle that for noise to be perceived there should be a origin of acoustic life force, the transmission path of that energy and the receiver. Action taken on any of the three properties should drive an effect on the centre of attention of sound reaching the ear. These could either be engineering controls, administrative controls , or use of personal protective equipment. In hypothesise of the above facts regarding noise , theories have been known in similarity to noise attenuation. Some proven and put into practice. In this serving we attempt to determine what attenuation can be achieved by increasing distance from source and also by bound the source of sound in an acoustic box . 2. AIM To search the performance of enclosures , and attenuation by dint of enclosure and distance from source. 3.

APPARATUS a ) An sound aim measuring stick with integrated relative frequency analyzer was used. This is a battery operated portable instrument with a unidimensional frequency response and when the leaden switch is set to linear , it registers the total sound level in dB. It has an octave adroitness analyzer which will pulsation the levels at the nominal shopping centre frequencies of 31.5 ; 63 ; 125; 250; gram; 4000 ; 8000 Hz. This is to give it a alike(p) frequency response to that of an ear. b) hoover to act as a spot source of sound c) acoustic box d) mag tape measure 4.METHODOLOGY...If you want to bugger come to a full essay, order it on our website: Orderessay

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