| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a small removable card-type flat speaker which can be easily removed, and a cell-phone terminal including the same. <P>SOLUTION: A removable card-type flat speaker includes a connector which is connected to an electronic device, a card body which holds the connector, a flat speaker which is arranged on the card body, sound detecting means which is arranged on the card body and detects ambient sound, a driving signal generating part which generates a driving signal for attenuating ambient sound and vibration based on the sound detected by the sound detecting means, and a driving part which drives the flat speaker based on the driving signal. <P>COPYRIGHT: (C)2012,JPO&INPIT |
