| 摘要 |
<P>PROBLEM TO BE SOLVED: To generate a false engine sound close to a real engine sound without need of mounting a large dynamic speaker such as a woofer in a vehicle and by suppressing the shortage of a low-pitched sound in a short range as a problem of a parametric speaker. <P>SOLUTION: A vehicular horn 4 of an existing electromagnetic type is used as a dynamic speaker so as to generate a false engine sound from the vehicular horn 4. The shortage of a low-pitched sound in a parametric speaker 1 is complemented with a false engine sound which the vehicular horn 4 generates. Thereby, without need of mounting a large dynamic speaker such as a woofer in a vehicle, a false engine sound can be generated which is close to a real engine sound. In addition, as the vehicle approaches a pedestrian, a sound tone of the false engine sound which the pedestrian hears changes, enabling the pedestrian to easily notice the approach of the vehicle. <P>COPYRIGHT: (C)2012,JPO&INPIT |
