Patent US 4,961,229

A speech recognition system for identifying a person by his voice includes an IC card, an IC card reader, a microphone, an A/D converter, an analyzer, and a collating circuit. The IC card is carried by a person whose voice pattern is stored therein. The IC card reader reads out the voice pattern from the IC card. The microphone, the A/D converter, and the analyzer cooperate to extract an actual voice pattern of the person carrying the IC card. The collating circuit collates the voice pattern read out from the IC card with the actual voice pattern from the analyzer.