Outdoor traffic noise effect in indoor sound distribution

Abstract

Noise mapping is one of the common acoustic project done, especially in urban environment. Researches have used different location, studied the usability area, and used simulation with numerical analysis as well as variety of data collecting techniques. However, information about noise distribution in an area that considers the sound distribution inside a building is still limited, since the indoor acoustics are mostly discussed in the field of room acoustics. Meanwhile, people tend to spend more time indoor instead of outdoor and therefore, such information above is considered important. This research propose a specific study about traffic noise effect to the indoor sound level distributions. Locations of this study are Faculty of Law (FH UGM) and Department of Electrical And Informatics Engineering Vocational College Universitas Gadjah Mada (DTEDI SV UGM). Selected based on interview results with the building management. The discussions are zoning of data collection points, identification of traffic noise from inside the building, analysis of sound wave attenuation, then the data are visualized via software that based on Geographic Information System or GIS. The identified traffic noise using simultaneous recording is categorized as continuous noise and intermittent noise such as police’s whistle, modified exhaust, and honking. Police siren is categorized as an outlierwith the highest sound pressure. The study proved that the external sound sources do produce noise that affect the distribution of sound level inside the building. Detailed results and possible recommendations for this issue have been submitted to FH UGM and DTEDI SV UGM.