Research Project on 'Program for Development of Indoor Noise Determination in Public Places (Stations and carriages of the Land Transportation System)'of the Republic of China (Taiwan)

摘要

In order to enhance the indoor noise quality at public places and encourage administrative units to proactively improve their indoor noise quality in an "autonomous administration" manner, between 2009 and 2011, the Environmental Protection Administration (EPA), Executive Yuan, commissioned field investigation and measurement of indoor noises of the land transportation systems in our country at representative locations such as station halls (or waiting rooms), access lanes, platforms and railway carriages. In total, indoor noises at 39 stations and 11 different kinds of railway carriages were measured (in L_(Aeq)), evaluated and analyzed. The measured results show that the L_(eq,1h) at station halls (waiting rooms or access lanes) during operating period is 56.5 dB(A)～ 73.6 dB(A), the L_(eq,event) at platforms is 66.3 dB(A)～ 82.6 dB(A), and the L_(eq,event) in carriages of various trains and routes is 70.9 dB(A)～80.6 dB(A).Improvement of indoor noise can only be achieved by eliminating reflection sound. Considering the characteristics of the land transportation system, we suggest that the rail operator install soundproofing ceilings and walls as the first step of providing passengers with an interior environment that allows them to speak and hear clearly so as to produce a virtuous circle of a good interior sound environment. At present, the rail operator might as well try to understand the possible room for improvement on warning volume and frequency band under the premise of ensuring the safety of passengers.