Swept frequency audible bond tester

摘要

A system for inspection of bonded structures utilizing an electromagnetic transmitting transducer for transmitting at an audio frequency which is varied linearly from 102 to 104 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.