Individual identification apparatus and method using frequency r

Details Individual identification apparatus and method using frequency r Individual identification apparatus and method using frequency r

1975-08-04

1976-10-19

Thesz, Joseph M.

Communications: electrical

Digital comparator systems

73 672, 128 2R, 181 5, 340 1R, G06F 100

Patent

active

RE0290084

ABSTRACT:
An electronic apparatus and method suitable for automatic machine interrogation of individuals for identifying persons such as those seeking admittance to secure areas or seeking an extension of credit. Acoustical wave energy is applied by an oscillator and transducer to the person's body, such as one end of an arm. Another transducer contacts another body part, such as the other end of the arm, to receive the body-transmitted energy. The frequency response characteristics of the body part are then detected by suitable correlation means to determine the amplitude and phase transfer functions. Comparison of a previously known transfer function of a person with a subsequently measured transfer function permits a machine decision whether the functions represent the same person.

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patent: 3677831 (1972-07-01), Pezaris et al.
patent: R27580 (1973-02-01), Rawson et al.

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