Essay On Noise Control

Measuring of noise is an important part in noise control. The main objective of noise measurement is to make accurate measurement which give us a purposeful act of comparing noises under different conditions for assessment of adverse impacts of noise and adopting suitable control techniques for noise reduction. There are many equipment use in noise measurements and Sound Level Meter is the most commonly using equipment in research field following diagram shows the basic components of a sound level meter. A sound level meter consists basically of a microphone and an electronic circuit including an attenuator, amplifier, weighting networks or filters and a display unit. The microphone converts the sound signal to an equivalent electrical signal.

It should be noted that the change of 3 dB (A) in traffic noise levels is just perceptible (Vicroads 1994). The following graph (figure 2.2) shows the increase of vehicle traffic noise with relate to the traffic volume.

Figure 2.2: Increase of traffic noise with traffic volume

However, all community noise situations involve one or more noise sources, one or more noise paths and one or more noise receivers. In planning for effective noise control, it is very important to consider opportunities that may exist to control noise at each of these three stages of its transmission. Source control include measures such as better mufflers, quite pavements, speed reduction and path control include barriers and soft ground while receiver control include improved windows, doors and walls and appropriate floor plan (Clair 2014).

There are two types of barriers between the source of the noise and receiver. First type are the barriers which are consisted by synthetic barriers such as concrete, stone, wood, and the paravanes which are made by metal and transparent plastics. The barriers which are consisted by living elements such as the plant belts which are formed by trees and bushes are the second type (S. Onder & Z. Kocbeker