| 摘要 |
<p>There is provided an optical microphone system whose power consumption can be reduced and which can be driven in multiplex at high speed. In an optical microphone system comprising an optical microphone (100) having a vibrating plate (101) which vibrates by receiving sound wave, a light emitting device (103) which emits radiant light (107) to the vibrating plate (101) and a light receiving device (104) for receiving the radiant light (107) reflected by the vibrating plate (101); and a driving circuit (200) for applying a driving signal for driving the light emitting device (103) to the light emitting device (103), the driving circuit (200) supplies a pulse signal having a predetermined cyclic frequency as the driving signal.</p> |
