Dome speaker with a diaphragm having at least one elongated cut-

Details Dome speaker with a diaphragm having at least one elongated cut- Dome speaker with a diaphragm having at least one elongated cut-

1985-02-28

1987-11-24

Rubinson, Gene Z.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having electrostatic element

181157, 181164, 181168, H04K 702, H04K 718, H04K 724, H04K 902

Patent

active

047093927

ABSTRACT:
A dome speaker comprising a dome-shaped diaphragm formed of a highly rigid material such as titanium or a titanium alloy, and having at least one elongated cut-out portion which varies the rigidity of the diaphragm and prevents a dip in the anti-resonance frequency range and a peak in the high resonance frequency range of the dome speaker. The speaker also includes a voice coil bobbin connected to the diaphragm. Preferably, the diaphragm includes two elongated cut-out portions in parallel relation to each other and with a center portion of the diaphragm interposed therebetween. A reinforcing rib may be integrally formed at an end of each cut-out portion. The cut-out portion may be covered either by a peripheral member made of a soft material or by a loss stopper formed of a viscoelastic material.

REFERENCES:
patent: 2085073 (1937-06-01), Bostwick
patent: 2404784 (1946-07-01), Bostwick
patent: 2974204 (1961-03-01), Supitilor
patent: 4020299 (1977-04-01), Garner et al.
patent: 4057694 (1977-11-01), Obuchi
patent: 4433214 (1984-02-01), Jasinski

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