| 摘要 |
A support having the form of a credit card equipped for authentification in magnetic or chip reader. The reader has a magnetic reader with complementary acoustic elements housed in an extra section (3) at the end of the card run. The additional acoustic items in the card (1) comprise a microphone (5), an acoustic transductor (B), a manual acoustic transmitting key (D) and two non visible keys (E) for releasing the acoustic sequence provided by an acoustic generator and a microprocessor. The extra section in the magnetic card reader contains a microphone (5),loudspeaker (6) and initiating catch (7).
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