AN INVESTIGATION INTO THE ACTUAL CONDITION AND SUBJECTIVE EVALUATION TEST OF ACOUSTICAL ENVIRONMENT IN RAILWAY STATION

There are many sound sources, for example trains, passenger and so on, and reflective materials are often used in large stations. So, many stations are noisy and reflective. To obtain the basic data for acoustical design in station, we measured sound level during operation and reverberation time and a distribution of sound pressure level at midnight without noise source in some stations. Next, we compared the results of these measurements and calculated value under diffuse sound field condition and used ray tracing method and so on. Finally, the relation between sound level and subjective evaluation was obtained by questionnaire survey.