Acoustics – Diaphragm – Critically defined material or coating
Patent
1981-01-23
1982-08-17
Fuller, Benjamin R.
Acoustics
Diaphragm
Critically defined material or coating
181168, H04R 700
Patent
active
043445039
ABSTRACT:
A diaphragm for electro-acoustic transducer which, as a component member, utilizes a layer of ceramics material, by which the E/.rho. ratio of the diaphragm can be increased, leading to an elevated resonance frequency of the diaphragm, whereby the limit frequency for reproducting of high-pitch sound can be shifted high, thus making it possible to widen the range of piston motion of the diaphragm, and to thereby improve its frequency characteristic. Also, a diaphragm utilizing a composite board formed by lamination of a layer of ceramics material and a layer of light-weight metal eliminates the fragility of diaphragm would entail when the diaphragm utilizes a single layer of a ceramics material alone, and thus the handling of the diaphragm is facilitated.
REFERENCES:
patent: 4135601 (1979-01-01), Tsukagoski et al.
Nakamura Akira
Nakaya Takao
Fuller Benjamin R.
Nippon Gakki Seizo Kabushiki Kaisha
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