Electroacoustic transducer of the flexural vibrating diaphragm t

Details Electroacoustic transducer of the flexural vibrating diaphragm t Electroacoustic transducer of the flexural vibrating diaphragm t

1974-06-27

1976-03-09

Budd, Mark O.

Electrical generator or motor structure

Educational or construction units or kits

179110A, 179115R, 179138R, 310 85, 310 91, H01L 4104

Patent

active

039433889

ABSTRACT:
The invention describes a low cost transducer construction utilizing a vibratile diaphragm to form a closure for a cylindrical tubular housing. The sound radiating surface of the diaphragm is of a concave shape to achieve an increased diaphragm thickness at its periphery. The concave diaphragm design permits the precise adjustment of the resonant frequency of large quantities of mass produced transducers by machining the surface of the thick rim portion of the diaphragm. Greater precision in the adjustment of the resonant frequency is achieved with this design because the frequency change is less critically dependent on the amount of material removed than is the case with a conventional flat diaphragm surface as used in prior art designs.

REFERENCES:
patent: 1355600 (1920-10-01), Gans
patent: 1738322 (1929-12-01), Schlenker
patent: 1815945 (1931-07-01), Hopkins
patent: 2910545 (1959-10-01), Glenn
patent: 3206558 (1965-09-01), Shoot
patent: 3736632 (1973-06-01), Barrow
patent: 3876890 (1975-04-01), Brown

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