| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve an acoustic guidance apparatus using signal wiring having a plurality of loudspeakers periodically arranged in a phase number order on its guidance route, by using two or more waves for signal tone generation different in traveling velocity per signal line, to give more efficient guidance than where only one wave is used.SOLUTION: By using a forward wave and a backward wave each of a constant velocity to transmit two waves conveying bird tweet signals differentiated to distinguish the two waves, guidance can be given on incoming and outgoing routes with a single signal line. A system using this apparatus, once a wave velocity u and the type of bird tweet are set, waves of the wave velocity u can be created by supplying a signal tone to a phase number p calculated by a controller of the system using a linear expression. Two wave velocities u1 and u2 are set to create signals wave of a faster wave velocity and a slower wave velocity, and they can be used for guiding pedestrians different in walking speed.</p> |
