| 摘要 |
PURPOSE: An emergency guide system is provided to enable a user to easily find an exit in a place filled with smoke. CONSTITUTION: A guiding system(A) installed most distant from an exit sounds a lowest sound. A guiding system(B) sounds a sound higher than the sound of the guiding system(A). The guiding system(C) sounds a sound higher than the sound of the guiding system(B). Guiding systems discontinuously generate sounds and allows recognizing the position of an exit. [Reference numerals] (1) Outer power source; (2) Emergency power source; (3) Memory; (4) Speaker; (AA) Figure2) generating discontinuous sound while differentiating frequency; (BB) About 262Hz; (CC) About 335Hz; (DD) About 408Hz |
