| 摘要 |
PROBLEM TO BE SOLVED: To obtain an alarm capable of easily adjusting the sound pressure of a voice alarm by simple configurations. SOLUTION: The fire alarm 100 is provided with: a smoke detection part 50 for detecting status change based on a physical phenomenon; an alarm sound control circuit 60 for issuing a voice alarm based on the detection signal of the smoke detection part 50; a case (body 10 and protection cover 20) for storing the smoke detection part 50 and the alarm sound control circuit 60; and an acoustic hole 24 formed in the case and for emitting the voice alarm to be issued from the alarm sound control circuit 60. The fire alarm 100 is provided with a sound pressure adjusting sticker 1 attached from the surface of the case to cover at least a portion of the acoustic hole 24 and for adjusting the sound pressure of the voice alarm to be output from the fire alarm 100. COPYRIGHT: (C)2011,JPO&INPIT |
