It is more hazardous than continuous noise because our ear is not habitual to this noise and has very severe effect on internal ear diaphragm. Noise, which comes for a very short duration is called an impulsive noise. There are two types of noise (1) impulsive (2) continuous. If our ear is exposed for a long time it may cause a fatal injury to us. Time also plays very important role when we calculate its effect on human beings. Decibel value is measured with respect to 20 - μ pascal reference sound pressure, which is threshold of audibility. It maps the sound directly to the way that human perceive it. Amplitude is measured in dB (decibel) value. A sound is generally a combination of different frequencies having same or different amplitudes. There are basically three main elements of sound that is frequency, amplitude and time. Thus it can also be said to be a psychological phenomenon on individual. Some sound may be pleasant for one at the same time this may be noise to another person. Any unwanted sound, which we don’t want to listen and has a very annoying effect on our ears, is noise. Following is a graphic representation of a sound.Īudio frequency ranges from 20 Hz to 20 kHz. These pressure variances (P) as waves propagate through a vibrating source makes changes in air pressure. Sound is mechanical energy in the form of pressure variances in an elastic medium. OSHA, Leq, SEL, SLM, statistical distribution, TWA Introduction At the end, a conclusion has been derived to standardize the noise monitoring procedures to cope up with international OSHA standard and threshold levels values (TLVS) of noise. In this paper various recommendation and suitable control have been suggested to reduce the impact of noise on human beings. It is found that noise level data observes a normal distribution curve in residential area of Chandigarh and it will help us to develop appropriate mathematical model. The noise level data in terms f SPL, Leq, SEL, Ln, Dose, frequency and time weighting average has been computed to statistically calculate the noise effect in real time and actual sense. Through this paper while using :Real time sound analyzer”, a sincere effort has been made to understand the basic causes and features of noise to study its impact on human beings and community as a whole. Therefore it has been immensely felt to monitor the noise intensity, its various parameters and quality to reduce it within permissible levels and further to meet the international standard. Journal of Industrial Pollution Control Abstractĭue to heavy urbanization, industrilisation, population explosion and thereby deforestation, ambient noise has increased to intolerable level in most of the places. Scientist, CSIO, EMID, Sector 30, Chandigarh, India

Noise pollution control