Electromagnetic transducers for underwater low-frequency high-po

Details Electromagnetic transducers for underwater low-frequency high-po Electromagnetic transducers for underwater low-frequency high-po

1987-06-08

1988-05-17

Jordan, Charles T.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367174, 367142, H04R 900, H04R 1100

Patent

active

047455861

ABSTRACT:
An electromagnetically driven vibratile piston underwater transducer element generates acoustic intensity levels in excess of 25 peak Watts per square inch of radiating surface in the low audible frequency region within the approximate range 500 to 2500 Hz. The design achieves an efficiency greater than 50% and a very low Q of less than 2. The electromagnetic design employs two separate independent air gaps and a unique mechanical coupling system that combines the electromechanical forces generated in each gap in the proper phase and transmits the combined oscillatory force to drive the vibratile piston.

REFERENCES:
patent: 2978669 (1961-04-01), Harris
patent: 3993973 (1976-11-01), Hutchins et al.
patent: 4584438 (1986-04-01), Koenig
patent: 4660186 (1987-04-01), Massa

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