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http://dx.doi.org/10.7731/KIFSE.2018.32.4.042

Comparison of Sound Pressure Level and Speech Intelligibility of Emergency Broadcasting System at Longitudinal Corridor  

Jeong, Jeong-Ho (Fire Insurers Laboratories of Korea)
Lee, Sung-Chan (Dept. of architecture and plant, Youngsan University)
Publication Information
Fire Science and Engineering / v.32, no.4, 2018 , pp. 42-49 More about this Journal
Abstract
In this study, in order to investigate whether or not the emergency broadcasting sound generated from an emergency broadcasting speaker is clearly transmitted to the occupant through architectural sound simulation, when the loudspeaker for emergency broadcasting is installed at intervals of 25 m according to NFSC 202 for a rectangular hallway. The sound pressure level and speech intelligibility index were analyzed according to changes in building finishing materials. With a reflective material finishing, sound pressure level satisfied the standard while speech intelligibility index was low. As a result of applying the sound absorbing material finishing, clarity and speech transmission index was improved to a level that could be understood by the occupant, whereas the sound pressure level delivered to the occupant decreased in the same space.
Keywords
Emergency broadcasting system; Speech intelligibility; Speech transmission index; Sound pressure level; Architectural acoustics simulation;
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  • Reference
1 National Fire Safety Code 202, "Fire Safety Code for Emergency Broadcasting System" (2017).
2 NFPA 72, "National fire alarm code", Quincy, MA, USA, National Fire Protection Association (2002).
3 BS 5839 : Part 1 2002, "Fire Detection and Fire Alarm System for Buildings", London, UK, British Standard Institution (2002).
4 H. S. Yang, J. H. Lee and J. S. Kim, "A Study on the Signal-to-Noise Ratio of Classrooms for Toddlers and School-aged Children at Deaf Schools", Audiology and Speech Research, Vol. 2, No. 1, pp. 28-32 (2006).   DOI
5 KS F ISO 3382-1, "Acoustics - Measurement of Room Acoustic Parameters - Part 1: Performance Spaces" (2018).
6 KS F ISO 3382-3, "Acoustics - Measurement of Room Acoustics Parameters - Part 3: Open plan offices" (2018).
7 B. K. Lee and J. Y. Jeong, "Speech Privacy Evaluation of Open-plan Office by ISO 3382-3", Journal of KIAEBS, Vol. 8, No. 5, pp. 254-260 (2014).