ANALYSIS OF PASSENGER TRAIN SONIC ENVIRONMENT USING SOUNDSCAPE METHOD

• Main Author: Hidayah, Nurul
• Format: Theses
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/47995
• Institution: Institut Teknologi Bandung

The raise of public interest in railway transportation services must be followed with an increasing indoor environment quality, including sonic environment comfort. The currently known method used for evaluating the sonic environment in a passenger train is by performing energy-based measurement in the terms of sound pressure level measurements without considering passenger perceptions on the sound environment, passenger activities, and their interrelations. A recent, alternative method that can accommodate these needs is the soundscape method. This study aims to analyze the sonic environment and passenger perceptions in various types of passenger trains. Different types of passenger trains potentially have different sonic environmental conditions so that they can provide different perceptions. Thus, the analysis of the correlation between the sonic environment of passenger train and the perspective received by passengers can be identified. The objects in this study were electric-power rail trains such as MRT and KRL as well as long-distance and medium-distance diesel-powered passenger trains. The measurement method used includes an objective method in the form of measuring the sound pressure level in the passenger train and subjective method by assessing the perception by the passenger through a questionnaire. Measurements and evaluations of the sonic environment were carried out on various types of passenger trains: MRT (79.60 dBA), KRL (76.54 dBA), medium-distance passenger trains (71.60 dBA), and long-distance passenger trains (67.44 dBA). The dominant sound heard on all four types of trains is the interaction between the wheels and rails. The only sound that could be heard on the electric-powered passenger train is the engine, while the only sound that was heard on the diesel-powered passenger train is the sound of the locomotive. The dominant dimension of perception that appeared in the sonic environment of electric passenger trains was preference. The dominant perception dimensions that emerged in the MRT sonic environment were preference and dynamic. Meanwhile, the dimensions of perception that appeared in the KRL sonic environment were preference, privacy, dynamic, and information. In contrast to electric-powered passenger trains, the dominant perception dimensions that emerged in the sonic environment of medium-distance passenger trains were security, relaxation, and dynamics while on long-distance trains there were additional perception dimensions, those were privacy and information. Different types of trains gave different perception to passenger. The sonic environment of diesel-powered passenger trains is perceived better than electric-powered passenger trains. The results also mentioned passenger perceptions were not only influenced by acoustic factors (LAeq and frequency characters), but also influenced by non-acoustic aspects.