What is noise?
While the developed countries of the information age are in an effort to enter the 21st century with the culmination of technology, the negative effects of technology on human beings and the environment are increasing day by day.
At the beginning of the 20th century, noise pollution, which became an important environmental problem created by rapid urbanization, increasing population and rapidly developing technology, has become an important issue to be emphasized. In short, as a result of technological development, the number of people exposed to noise has increased rapidly. As the negative effects of noise on human health and environment increased in recent years, a significant increase was observed in the number of studies on this subject.
Noise; It is an important type of environmental pollution that negatively affects people's hearing health and perception, disrupts physiological and psychological balances and reduces work performance. Acoustic pollution or noise; as a more common species in developed countries compared to other types of pollution; When it is considered as an environmental problem, first of all, the highest levels of noise (noise criteria and limits) to be accepted in terms of human and public health are determined and then, with the methods of measurement and estimation of the existing noise conditions in the environment examined. and control of the noise within a system should be made.
Noise measurement is done with a sonometer. The stopwatch gives the intensity of the sound in decibels (dB). DB is a sound evaluation unit in which the human ear is most sensitive and high frequencies are particularly emphasized. The dB unit, which is widely used in noise reduction or control, When noise exceeds certain limits, both mental and physical disorders occur in humans. According to the studies of World Health Organization (WHO) and International Labor Organization, 0 dB is the threshold of human ear. Psychological symptoms are observed depending on personal sensitivity in sounds between 30-60 dB. Psychological, physiological and autological disorders occur in sounds between 65-85 dB.
Noise prevention is carried out with the participation of experts from various branches gathered under the name of noise control engineering. On the other hand, serious technical audits related to noise have been carried out in various countries as well as international Technical Standards which are reviewed every year and reviewed various aspects of the subject. It is a fact that noise levels and influences are gradually increasing.
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