佩戴耳塞防音防護具時對火災警報聲的可聽度探討

The Establishment and Implementation of Third-party-audit System for Temporary Structure

本研究將探討火災警報警告聲之音壓值、警告音源位置與其可聽度的關聯性。即當佩戴耳塞時，遇到火災警報警告聲，且在作業場所的高工作噪音下，是否能有效的收聽到火災警報警告聲，以及如何避免因火災警報警告聲之高音量與高工作噪音疊加後之音量，而增加現場工作人員的聽力損失的風險，以及進一步探討，火災警報警告聲音源的架設位置的選擇，用以提高火災警報警告聲的可聽度。本研究係利用耳部模擬器AEC206，並在前、左、後、右等音源位置，撥放970 Hz警告聲，其播放音量由75 dB至90 dB，每次增加5 dB，用以進行三種耳塞測試。由結果得知當火災警報警告音壓值在75 dB時，便能有效的收聽到火災警報警告聲，用以避免因高音量之火災警報警告聲而增加的聽力損失的風險，至於，此增加的聽力損失的風險，則需進一步探討。此外，關於警告音源位置，由於對前面與後面來的警告聲有比較好的可聽度，因此，建議可以將火災警報警告聲音源架設在工作場所的前面與後面，用以得到較好的火災警告聲可聽度。

This study is to discuss the correlation of the sound pressure level, sound source, warning recognition of fire alarm. When worker wear the earplug, whether they can hear the fire alarm clearly with the working noise. Also, how to reduce the risk caused by the high intensity of working noise sound and fire alarm sound. The second research question was to how to increase the recognition of warning sound based on the site selection of fire alarm. This research used the laboratory ear simulator AEC206 for three earplugs. The sound sources were placed at front side, left hand side, back side, right hand side. The volume of warning sound was played from 75 dB to 90 dB. When the volume of warning sound was at 75 dB, it could be received. The higher volume of warning sound increased, the more it could be received. About the site selection for the placement of warning sound, it could be either placed at front site or back site of the working area for the better recognition of warning sound.