The Journal of the INCE of Japan
Online ISSN : 1883-7506
Print ISSN : 0386-8761
Volume 40 , Issue 2
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  • Sohei Tsujimura, Yasuhiko Izumi, Masaaki Hiroe, Emi Toyoda
    2016 Volume 40 Issue 2 Pages 81-89
    Published: April 01, 2016
    Released: December 27, 2019

    Many elderly people will take a train for the future in Japan since Japanese society is aging rapidly. The listening difficulty of a spoken announcement at a railroad yard has become a serious problem in Japan. For the elderly who develop hearing loss with aging, it is difficult to comprehend the public spoken announcements at major railway stations, especially in the crowded Tokyo metropolitan area. At present there are no guidelines for the presentation level of an announcement at a station, railway corporations desire to have a guideline on the presentation level of a spoken announcement at a station in an aging society. Therefore, in our study, in order to support railway corporations in drafting a guideline on the presentation level of the spoken announcements at a station in an aging society, subjective experiments were carried out in which both elderly and young adults participated using a physically built simulated station. From the results, the relationship of the A-weighted sound pressure level and the annoyance of announcement, as well as the relationship of the signal-to-noise ratio and the listening difficulty were quantified. We suggest the minimum signal-to-noise ratio which is felt the listening difficulty and the maximum presentation level which is felt the annoyance of an announcement under each ceiling condition.

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