Swept frequency audible bond tester

Details Swept frequency audible bond tester Swept frequency audible bond tester

1977-06-24

1978-10-31

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

G01N 2904

Patent

active

041227247

ABSTRACT:
A system for inspection of bonded structures utilizing an electromagnetic transmitting transducer for transmitting at an audio frequency which is varied linearly from 10.sup.2 to 10.sup.4 Hz with a repetition rate which is variable from 2 Hz to 50 Hz into a part being tested and including a condenser microphone also coupled to the part for providing in a receiver circuit an audible output which enables the operator to distinguish a change in the audio spectrum representative of a disbond condition.

REFERENCES:
patent: 2824979 (1958-02-01), McKee
patent: 2846874 (1958-08-01), Horn
patent: 3531982 (1970-10-01), Clotfelter et al.
patent: 3564903 (1971-02-01), Woodmansee et al.
Booth, "Sweep Random Vibration", MB Vibration Notebook, vol. 9, No. 1, pp. 4-8, Feb., 1963.

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