The basis of all decisions is supported by the objective and accurate measurement of noise. Noise level measurements are taken at a suitable number of positions around the area and are marked on the sketch. For example, a truck generating a sound of 90 decibels at 11:30 p.m., within 50 feet of a residential property when measured from a distance of 35 feet, violates the N.Y. noise code by 5 decibels. Noise is measured in decibels (dB) using a pattern-approved sound level meter. A reasonably accurate sketch showing the locations of workers and noisy machines is drawn. A noise survey involves measuring noise level at selected locations throughout an entire plant or sections to identify noisy areas. Environmental noise emission. This briefing presents updated estimates of the numbers of people exposed to environmental noise pollution in Europe. A sound level meter is an instrument which has a microphone amplifier and weighting networks and an indicating meter which gives a reading in dB relative to 2 × 10-5 N/m 2. This chapter describes the noise measuring instruments most widely used in the practice of occupational hygiene. Compare the average to municipal noise regulations to determine if a source creates illegal noise pollution. Prevention of Noise Pollution . It also provides a new summary of the measures being used in Member States to manage noise. Briefing Managing exposure to noise in Europe Noise pollution poses a high risk to human health. Noise pollution is considered to be any unwanted or disturbing sound that affects the health and well-being of humans and other organisms. This is usually done with a sound level meter (SLM). Environmental noise is an accumulation of noise pollution that occurs outside. Reasons for measuring noise. Noise pollution hampers the sleep cycles leading to irritation and uncomfortable state of mind. The measurements are typically taken over a period of weeks, in all weather conditions. Cardiovascular issues: Heart-related problems such as blood pressure level, stress, and cardiovascular diseases might come up in a normal person and person suffering from any of these diseases might feel the sudden shoot up in the level. Sound is measured in decibel s. There are many sounds in the environment, from rustling leaves (20 to 30 decibels) to a thunderclap (120 decibels) to the wail of a siren (120 to 140 decibels). The most typical reason for measuring noise pollution is in response to a specific nuisance issue, perhaps relating to an industrial process or restaurant near a residential area. Sound level meter is used in laboratories to measure noise pollution. The planning, the strategy and the practical aspects of a noise survey are discussed in Chapter 7. PARAMETERS FOR NOISE POLLUTION MEASUREMENT: For noise emission measurement, change in several sound characteristics is determined for detecting and recording the accurate values in dB.
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