1.1 Background of the Study
Traffic noise is considered as one of the important sources of noise pollution that adversely affects human health. On densely traveled roads the equivalent sound pressure levels for 24h can reach up to 75–80 dB. Evidences indicate that noise pollution may have an adverse impact on human health and has been stated as a serious health hazard. Noise-related health hazards cause damage to humans ranging from annoyance to insanity and death.
There are many factors which influence the generation of traffic noise level under circumstances. For instance, on the supply side, traffic flow, speed, composition, frequency of stopping and starting, road gradient and surface. When considering the affected side, the factors like proximity to road, type of land use and time of day, also affect the generation of traffic noise.
1.2 Purpose of the Study
The main purpose of the study is to assess and find out the variations in traffic noise level under Stop-Go situations.
1.3 Objectives of the Study
The objectives of this study are:
* To determine the level of noise due to vehicle Start.
* To determine the level of noise due to vehicle Stop.
* To assess variations in traffic noise level under Stop-Go situations.
The study area is an intersection where is located along Persiaran Utama road. The intersection is signalized and it is located at Skudai Town. Skudai Town is located within the Johor Bahru District and it is between the Senai and Johor Bahru City Centre. It is under administrative of Johor Bahru Central Municipal Council. Figure 1-1 shows the location of study area.
Figure 1-1: Study Area.
1.5 Scope of the Study
The scope of this study is mainly focused on the assessment level of noise under Stop-Go situations. The study area is intersection where is tied Persiaran Utama road with Persiaran Utama 1 road. The collected data are Noise level. The instrument that has been used to collect data is a survey.
Stop-and-Go or more generally interrupted traffic is one of traffic phenomena being controlled by traffic signals at intersections. The prediction of traffic noise level in such the area needs the characteristic of traffic flow in conjunction with noise emission level of each vehicle type. The movement characteristic of traffic at an intersection can be forecasted using traffic flow theories whereas noise emission level is obtained from field measurement data.
This study aiming at the collection of stop and go noise emission level which indeed relates to the level of noise pollution received by student and teacher at Sekolah Menengah Kebangsaan Mutiara Rini. As the school is located at a busy intersection, noise pollution in the school environment is expected to disturb the activities in school such as study, discussion and teaching session. Therefore, the environmental assessment of traffic noise at intersections near the school is measured.
2.2.1Definition of Noise
People who study acoustics define noise as complex sound waves that are aperiodic, in other words, sound waves with irregular vibrations and no definite pitch. In engineering, noise is defined as a signal that interferes with the detection of or quality of another signal. In fact, it is difficult to recognize the noise sound from others. For Instance, Is music noise? Is the hum of tires on a highway noise? Is the surround-sound movie theater noise? Is the philharmonic concert noise? And what about the accompanying beat for aerobic exercises at the health club? Sounds that are soothing for some are irritating to others. Basically, noise is unwanted sound. It is a pollutant and a hazard to human health and hearing. Noise is one of the environmental pollutants which create interference in communication and health (Agarwal and Swami 2009; Prabat and Nagarnaik...