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백은선(Eun-Sun Baek),박현구(Hyeon-Ku Park) 한국소음진동공학회 2019 한국소음진동공학회 논문집 Vol.29 No.6
The household smoke alarm is a warning device used to minimize damage in case of fire in a house or business. There are many types of fire detectors, but smoke alarms are known to be the most efficient. This study was conducted to analyze the acoustic characteristics of household smoke alarms. Thirteen domestic and overseas products were measured to determine whether the acoustic characteristics meet the legal thresholds when the sensor generates sounds. The changes in the characteristics of the detector when the power supply voltage dropped, were also analyzed. As a result, most of the measured products met the legal standard; however, one of the contents of the generated sound source did not meet the standard. As a result of measuring the alarm sound and the voice being separate, it was found that the alarm sound satisfies the legal regulation, but the voice was not satisfactory in most cases. Furthermore, when the supply voltage drops, some of the products do not meet the legal regulation, which was judged to be a problem due to the simultaneous use of alarm and voice in one product. In the case of a mixed of alarm sound and voice, the sound pressure level should be designed to be clearly distinguished according to the type of sound source.
전압변동에 따른 비상경보설비의 음향특성에 관한 실험적 연구
백은선(Baek Eun-Sun),백건종(Baek Geon-Jong),신훈(Shin Hoon),장길수(Jang Gil-Soo) 한국건축친환경설비학회 2009 한국건축친환경설비학회 논문집 Vol.3 No.1
In this study, voltage variation effects on sound level of fire alarm system were examine in the anechoic room and free field condition. Followings are results. Within the voltage band of ±20% from 24V(center) which is standard voltage, the sound pressure level is considered to be stable but in the condition of -20% below standard voltage, adequate sound pressure level is not assured. Acoustic equipment which is far from receiver can not fulfill standard sound pressure level output due to voltage dropping and this could cause a problem that fire alarm could not be heard to inhabitants.
전압강하에 따른 화재비상경보 설비음의 변동특성에 관한 실험적 연구
백건종(Baek Geon-Jong),신훈(Shin Hoon),장길수(Jang Gil-Soo),백은선(Baek Eun-Sun),송민정(Song Min-Jeong) 한국건축친환경설비학회 2009 한국건축친환경설비학회 학술발표대회 논문집 Vol.- No.-
In this study, voltage variation effects on sound level of fire alarm system were examined. Followings are results. Within the voltage band of ±20% from 24V(center) which is standard voltage, the sound pressure level is considered to be stable but in the condition of -20% below voltage dropping, adequate sound pressure level output is not anticipated. Acoustic equipment which is far from receiver can not fulfill standard sound pressure level output due to voltage dropping and this could cause a problem that fire alarm could not be heard to inhabitants.