| 摘要 |
<p>The invention concerns a method for transmitting (6) and receiving (7) acoustic signals using a nomadic electronic object (1) in the form of a credit card. Said method consists in: producing in the thickness (4) of the card a micro-winding (2) wherein flows an electric current co-operating by electromagnetic connection with a flexible and magnetised diaphragm (3) or (3a). If the nomadic object (1) comprises two shells (1a) and (1b), between which is inserted the micro-winding, the method comprises a step which consists in producing said flexible diaphragm ( (3) or (3a) by printing a magnetic layer on the inner surface (1c) or (1d) of at least one of the shells (1a) or (1b). Thus, by using the micro-winding (2) and the flexible diaphragm ( (3) or (3a) associated therewith, the nomadic electronic object (1) can pick up (7) and produce (6) acoustic signals.</p> |
