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http://dx.doi.org/10.5050/KSNVE.2013.24.2.146

Evaluation of Speech Privacy on the Seat-design in High-speed Train Passenger Cars  

Jang, Hyung Suk (Department of Architectural Engineering, Hanyang University)
Kim, Jae Hyeon (Department of Architectural Engineering, Hanyang University)
Jeon, Jin Yong (Hanyang University)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.24, no.2, 2014 , pp. 146-153 More about this Journal
Abstract
This study investigates the effects of seat-design elements such as seating arrangement, shape, and height on speech privacy in high-speed trains. For the evaluation of speech privacy, acoustic simulation software was used to reproduce room acoustical conditions in passenger cars on the basis of in-situ measurement data. The influences of speech source directivity and source height on privacy distance ($r_P$) were investigated, and it was found that $r_P$ determined using an omni-directional source was relatively shorter than that determined using a directional source. It was also found that $r_P$ decreased when the source height was lower than the height of the seat-back because the seat-back blocked the propagation of speech from the sound source. The effect of seating arrangement was not significant when comparing the vis-a-vis seating and one-side seating arrangements. In addition, among the alternative seat-designs, the seats that block the space between the seats and cover the space near the ear were found to show significantly enhanced speech privacy in high-speed train passenger cars.
Keywords
High-speed Train; Room Acoustics; Speech Privacy; Seat-design; Acoustic Comfort;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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