Communications – electrical: acoustic wave systems and devices – Testing – monitoring – or calibrating
Patent
1993-11-30
1995-03-21
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Testing, monitoring, or calibrating
H04R 2900, G01R 2726
Patent
active
054002974
ABSTRACT:
A method and a system for testing one or more transducers, preferably acoustic transducers, from a central control unit. The transducers are individually connected to the inlet of a preamplifier (4) having a relatively high input resistance (6). A test conduit extends from the central control unit to each transducer. The test conduit communicates with the joint between the transducer and the inlet of the preamplifier (4) through a relatively small capacity (10). In this manner a method is obtained for testing the transducer, said testing being highly sensitive to the condition of the transducer and relatively insensitive to external fields.
REFERENCES:
patent: 3230449 (1966-01-01), Kaiser
patent: 4648078 (1987-03-01), Darton et al.
patent: 4648079 (1987-03-01), Stedtnitz
patent: 4942614 (1990-07-01), Hamilton
A/S Bruel & Kjaer
Pihulic Daniel T.
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