Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1993-06-23
1994-09-27
Eldred, J. Woodrow
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
181148, 181159, 181177, 181185, 181186, 381153, 381156, 381158, 381161, 381192, 381198, H05K 500
Patent
active
053512200
ABSTRACT:
The present invention involves a moving-coil electrodynamic electroacoustical transducer, comprising a disk made of a hard, nonmagnetic material (12), which is superimposed on the diaphragm (11) and has openings for the output of sound, a power-factor-improvement device/super charger (13) made of a nonmagnetic material which is placed in the concavity of the diaphragm (11) and which has annular, concentric ducts (13') having a conical shape, and a cover (14) made of a nonmagnetic material serving as the lid in both configurations of the transducer, the said cover being applied to the body facing the concavity of the said diaphragm in a direct-radiation transducer, while it is applied to the body facing the convexity of the said magnetic disk (12) in an indirect-radiation transducer.
REFERENCES:
patent: 5117462 (1992-05-01), Bie
Applied Acoustics, Olson and Massa, .COPYRGT.1939, pp. 240-243.
Handbook for Sound Engineers, 2nd Ed., Ballou, editor, pp. 544-549.
Eldred J. Woodrow
Online S.N.C. Di Noselli G. & C.
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