| Keywords |
Audible fire alarm device ; University dormitory ; Sound attenuation ; Field sound insulation performance of door ; Sound analysis computer simulation |
| Abstract |
The aim of this study is to investigate the current status of the sound attenuation of the fire alarm signal in a university dormitory and to examine acoustic conditions of fire alarm devices for achieving the proper fire alarm signals in the sleeping area. The process of this study has been divided into two categories: the field measurements of sound attenuation of fire alarm signal in a university dormitory and the case study using the sound analysis computer simulation in four double-loaded corridor type buildings such as dormitories, hotels, and residential officetels. Measurements on the sound attenuation of various sound sources such as alarm bell, horn and electronic siren were performed and compared with the minimum sound level of 75 dBA which can reasonably be expected to awaken a sleeping person in most circumstances. To achieve a sound level of 75 dBA from the common corridor to within the units in a university dormitory, in this study, the required levels were ranged between 104 dBA and 105.2 dBA at a 1m point from the front door of each unit. In the case study for achieving a sound level of 75 dBA in sleeping area of double-loaded corridor type buildings, based on the measured results, it was determined that the sound power level of the fire alarm device installed within the common corridors in accordance with the type of buildings should be approximately 109.6 dBA, with four to eleven alarm devices (distance between devices: 6.1-17.9 m). |