Abstract
Levels of noise generated from grinding mach ines were measured. Noise levels as high as 116d B was obtained. These levels of noise can be stressful that can result to fatigue. It is capable of causing temporary and permanent deaf. No ise spectra generated from grinding machines are mixture of lo w and high frequencies. Low and high frequencies noise can have negative effects on memory. The levels of noise generated from these machines are very high and are above the international standard value. Critical investigations showed that some of these machines are old enough to be replaced, lack adequate maintenance and were poorly installed, thereby gave rooms for vibrations. Noise generated from these machines can result to quarrel in the neighbourhood since they are located within the co mmun ity
Highlights
The ability of man to make and detect sound offers him the opportunity to communicate and receive valuable informat ion fro m the environment, namely; sound alarm, music, television and others
Low frequency noise is capable to increase cortisol values, which is an indicator of stress
Other physical effect attributed to low frequency noise include, peripheral vasoconstriction, elevated blood pressure and greater risk of cardiovascular disease
Summary
The ability of man to make and detect sound offers him the opportunity to communicate and receive valuable informat ion fro m the environment, namely; sound alarm, music, television and others. Noise generated from industrial use of machinery, airplanes, trucks, pu mps, turbines generator, steam traps and others should be differentiated fro m those of the community. The major sources of community noise are highway traffic, aircraft, construction work, and distribution of transformer, railway trains, and factories fro m wh ich noise escape to the surrounding areas [1]. Noise can keep our senses on edge and can prevent us fro m relaxing. A lso as an insidious pollutant, damage is usually long range and permanent, yet it is certainly the pollutant of least public concern and perhaps the least understood [2]
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