Miniature low frequency acoustic transmitter

Details Miniature low frequency acoustic transmitter Miniature low frequency acoustic transmitter

2007-09-04

2007-09-04

Pihulic, Dan (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

Reexamination Certificate

active

11473420

ABSTRACT:
A miniature lightweight transmitter that mechanically generates low-frequency acoustic energy is described, wherein one or more miniature balloons filled with air are positioned at the center of a pressure vessel filled with water and tethered in place. The system is then driven into resonance by using transducers that directly drive the wall of the pressure vessel or by using a piston to drive fluid into and out of the pressure vessel.

REFERENCES:
patent: 3437170 (1969-04-01), Brock
patent: 3493072 (1970-02-01), Johnston
patent: 4890687 (1990-01-01), Medlin et al.
patent: 4961175 (1990-10-01), Blue et al.
patent: 4961181 (1990-10-01), Elliot
patent: 5999491 (1999-12-01), Harvey et al.
patent: 2003/0138120 (2003-07-01), Tripoli, III
Claude C. Sims, Bubble Transducer for Radiating High-Power Low-Frequency Sound in Water, The Journal of the Acoustical Society of America, Oct. 1960, pp. 1305-1308, vol. 32, No. 10.

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