Environmental noise has been defined as any unwanted sound created by human activities that is considered harmful or detrimental to human health and quality of life (Murphy et al., 2009). In urban areas, unwanted sounds (environmental noise) come overwhelmingly from road-based transportation but rail-based, airport transportation and industrial noise are also important sources (Enda Murphy & Eoin A. King et al. 2014). In the European Union (EU), problems with noise pollution have often been given similar concern ratings as those for global warming (CALM, 2007). In fact, the results from the environmental burden of disease in Europe project show that traffic noise was ranked second among the selected environmental stressors evaluated in terms of their public health impact in six European countries (WHO, 2011), indicating the heightened awareness among the general public about noise pollution as an environmental issue. Moreover, a recent Eurobaro-meter survey showed that 44% of Europeans believe that noise affects human health to a ‘large extent’, an increase of 3% since 2006 (European Commission, 2010)
Noise pollution is defined as distressing noise that may harm the physical/mental activity of human beings as well as animal life. Currently, the matter of noise pollution is of prime concern. The objective of the presented paper is to create awareness among educated people and spread the knowledge information about noise pollution. (Deepak Jhanwar et al. 2016).
In the EU countries, the noise impact of large industrial sites is regulated under Council Directive 96/61/EC, which is more commonly known as the IPPC Directive (Official Journal of the EU, 1996). This has been recently codified as Directive 2008/1/EC (recast as Directive 2010/75/EU), which includes all of the previous amendments as well as adaptations. The purpose of the directive is to control the impact of industry on the environment outside of the facility. The directive applies to all new sites and existing sites will have had to have been included by 2007. The directive covers all aspects of ‘pollution’ in the industrial context from the sites including gases, solids, liquids, noise, vibration and the use of raw materials (Official Journal of the EU, 2010). The most recent policy document focusing on environmental noise is Toward a Comprehensive Noise Strategy (Guarinoni et al., 2012). In response to a rising evidence base suggesting health effects associated with excessive noise pollution, the EU passed Directive 2002/49/EC, also known as the END (EU, 2002).
Industrial noise
Industrial noise can be anything from the noise emitted from steel making plants, coal fired power stations, car assembly plants, furniture-making workshops, train depots or the loading and unloading of trucks at a distribution center. Other activities can be classified as industrial activities or even their own subset of industrial activities, such as mineral extraction sites (Enda Murphy & Eoin A. King et al. 2014).
Noise is found almost everywhere. Some industrial locations have even louder continuous noise. Noise corresponds to undesired sound and any needless disturbance within a useful frequency band. The generation of most of the noise in the world is mainly caused by industrial machines, transportation systems etc. as well as indoor noise generated by machines (especially in some workplaces), building activities, domestic appliances and music performances (Deepak Jhanwar et al. 2016).
Dose–response curves for industrial noise have not been developed to the same extent as those for transportation noise. This is probably because industrial noise is less widespread than transportation noise, and industrial activities vary significantly from site to site which makes it more difficult to establish a stable dose–response relationship (Berry and Porter, 2004). However, we know from previous research that industrial noise is more annoying than transportation noise at equivalent noise levels (Miedema, 1992).
In truth, the level of annoyance from an industrial noise source can be increased by a wide variety of factors, some of which are related to the noise content (tonality, impulsiveness, intermittency, low-frequency content) while others are related to factors outside of traditional acoustic considerations. A 2003 study in the Netherlands compared noise annoyance from shunting yards (a seasonal industry) and other industries (Miedema and Vos, 2004).
Furthermore, aversion to the industry itself, in terms of people’s perceptions of it, may increase the overall level of annoyance associated with it (Crichton et al., 2013).
Type of system and noise parameters that required to be measured
In simplistic terms, there are two types of noise monitoring systems. The first is a real-time control system that uses the noise levels from remote locations to allow the operators to take immediate action. This type of system is commonly used where the noise levels from a facility are consistent but there are situations where higher noise levels may occur. Venting of steam or lighting stack flares is some examples of this. In this type of system having access to the noise levels as they occur is essential. However, it may also be useful to have historical and trend data available for reporting and complaint handling. The second type of system could be considered to be ‘on-demand’. In this type of system, which is more typical of airport noise monitoring where the monitoring locations are often remote from the control location and where it is not essential to have the noise information in real-time, the noise monitors can be connected using landline or GSM modems (J. Tingay et al. 2006).
One of the most important aspects that must be considered is what information is required from the system and how will be communicated to any regulatory authorities or third-party stakeholders. This must be specified at the start of the development, as modern noise monitors can measure, record and report noise levels in a wide range of ways.
For applications where noise events are not the focus, and this is typical of noise monitoring at industrial sites and power stations, longer-term noise data measured over specific periods can be used. This type of data will produce more information but this can be used to create graphs and reports showing noise trend data (J. Tingay et al. 2006).
Survival in the environment
The general purpose of noise measurements and surveys is to provide an objective description of the acoustic environment surrounding a particular activity that is emitting noise (Noise measurement procedures manual, 2008). Many large industrial sites will already have weather measurement capabilities. Where there are fumes, gases or dust being produced, information about the prevailing wind direction and wind speed are essential. However, for locations where this information is not already available, the measurement of environmental conditions, such as wind speed and direction, can be very useful (J. Tingay et al. 2006).
Although the microphones used with a permanent noise monitoring system would include a windshield and rain shield of some form, there is a point at which the noise generated by wind hitting the windshield may be higher than the actual noise being measured. Heavy rainfall can also increase the overall noise levels, particularly where the noise monitor is located near trees. The weather conditions that a system will be used in should be considered when specifying the type of equipment to be used (J. Tingay et al. 2006).