Unit 1: LO 4
4.1 Identify risk within its place of work
My workplace name is Ginetta Cars. Ginetta Cars is a British specialist builder of racing and sports cars based in Garforth, Leeds, West Yorkshire. I have been working as a mechanic for the last three years. There are several risk hazards in my workplaces where noise pollution is one of them (Ginetta Cars, 2018).
Noise pollution is defined as the unwanted sound which is released into the environment. It disturbs the human being and causes an adverse effect on the mental and psychological well-being. It is measured in the units of decibels and is denoted by the dB. The noise which is more than 115 dB is tolerant. The industrial limit of sound in the industries must be 75 dB according to the world health organization. A typewriter can produce a sound at 60 dB. Some experts ironically refer to noise as a ‘silent killer, affecting both physical and mental health’.
Although noise is recognized as a major environmental stressor, there is a lack of sufficient research on its association with mental health. The Gutenberg Health Study (GHS) carried out an investigation on 15,000 people aged 35 to 74 to assess the noise annoyance from traffic, industrials sites, aircraft, railways, and neighborhoods (during the day and during sleep hours). Results found that depression and anxiety increased with the degree of overall noise annoyance, with aircrafts leading – affecting 60% of the participants. Strong noise annoyance was linked with a higher prevalence of depression and anxiety, while severe annoyance has been linked with reduced well-being and health.
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4.2 Identify the source of the risk
There are many sources in Ginetta Cars from which noise pollution can arise. These are given below:
Industrial Gas Jets
According to Gordon (2018), industrial jet noise probably ranks third as a major cause of hearing damage after that of impact and material handling noise. Air jets are used extensively for cleaning, drying and ejecting parts, for power tools, blowing off compressed air, steam valves, pneumatic discharge vents, gas, and oil burners, etc. Typical sound pressure levels at 1 m from a blow-off nozzle can reach 105 dB(A).
Ventilator and Exhaust Fans
It is rare not to find one or more ventilators or exhaust fans in each department of an industrial or manufacturing complex. According to Gordon (2018), fan and blower noise is the easiest and most straightforward noise problem to solve, using an absorptive type silencer. Fans are used to move a large volume of air for ventilation, by bringing in fresh air from the outside, blowing out dust, vapor or oil mist from an industrial environment, and for a drying or cooling operation, etc.
According to Gordon (2018), compressors are usually very noisy machines with high pressure. There are several types of compressors: rotary positive displacement, gear or screw compressors, reciprocating compressors, and liquid ring compressors are the most common.
According to Gordon (2018), noise from electrical equipment such as motors and generators is generally a discrete low frequency, superimposed on a broadband cooling system noise. The electric motor converts electrical energy to magnetic and then mechanical energy with the output of a useful torque at the motor shaft. Part of the energy transformation is converted to heat, causing a rise in the rotor, stator, and casing temperature; therefore an electric motor must be supplied with a cooling fan system…………….