Unknown sound evaluating method and apparatus

Details Unknown sound evaluating method and apparatus Unknown sound evaluating method and apparatus

1984-10-05

1986-05-06

Ciarlante, Anthony V.

Measuring and testing

Vibration

Loose object detection

367129, G01N 2904

Patent

active

045863784

ABSTRACT:
Method and apparatus for evaluating location of an unknown sound generated in a structure such as a pressure vessel. A plurality of sound detectors are mounted on the structure for detecting sounds generated in the structure. On the basis of sound information of the unknown sound source derived from the outputs of the detectors, the location where the unknown sound is produced is determined. To this end, reference sounds are first generated at a plurality of known reference sound source positions, wherein information of the reference sounds derived from the outputs of the detectors are stored in a storage unit. Equi-pattern-distance curves each of which is in an equal pattern distance between a supposed unknown sound source and each of the reference sound sources are calculated on the basis of the reference sound information. The equi-pattern-distance curves are further corrected in accordance with the reference sound information. Upon occurrence of an unknown sound, pattern distances between the desired reference sound source positions and the unknown sound source position are calculated through pattern recognition procedure from the sound information derived from the outputs of the detector and the reference sound information stored. On the basis of the calculated pattern distances and the equi-pattern-distance curves, the position of the unknown sound source is determined. On the basis of the position of the unknown sound source, kinetic energy thereof may be arithmetically determined.

REFERENCES:
patent: 4009463 (1977-02-01), Vercellotti et al.
patent: 4352167 (1982-09-01), Hashimoto et al.
patent: 4459851 (1984-07-01), Crostack

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