Broadcast System Performance Improvement in Noisy Environment

• Main Authors: Yang,Wenpin, 楊文斌
• Other Authors: Ho,Sanpin
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/45847996455741130057

碩士 === 長榮大學 === 職業安全與衛生學系碩士班 === 99 === This study is to conduct fire horn speaker of performance-improving designing approach, assisted with the software of theater sound simulation－Yamaha Sound System Simulator－designed by a Japanese corporation, YAMAHA, to probe into the noisy environment (such as air compressor room, etc) to help solving the ineffective receiving from speakers. Via the result of the live testing, we find the computed values of sound pressure of different setting distances under the functional formula set according to the Standard of Fire Safety Code 133 are higher than those actually gauged by sound level meter. Moreover, the distribution of the values of sound pressure simulated by Y-S3 also accord with those actually gauged of the curve of minimum sound pressure. This result provides the basis for the research of speaker performance-improving designing and also suggests that the values of sound pressure simulated by Y-S3 are conservative and referable in the following research. During the unwarned fire evacuation drill in small noisy environment, the personnel can clearly identify the human voices and alarming sirens issued by the emergency-broadcasting speakers if the comprehensive values (noises of targeting field and of speakers) of sound pressure lively gauged by the sound level meter is higher than the net sound pressure solely issued by the speakers within 6 dB. This research took a factory for experiment, by using Y-S3 to proceed with the performance improvement of the speakers, and the effects of the emergency broadcasting system are obviously promoted.