Loudspeakers

Details Loudspeakers Loudspeakers

2005-01-04

2005-01-04

Kuntz, Curtis (Department: 2643)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Driven diverse static structure

C381S407000, C381S423000

Reexamination Certificate

active

06839444

ABSTRACT:
A loudspeaker comprising a panel-form acoustic member adapted for operation as a bending wave radiator and an electrodynamic moving coil transducer having a voice coil mounted to the acoustic member to excite bending wave vibration in the acoustic member. The junction between the voice coil and the acoustic member is of sufficient length in relation to the size of the acoustic member to represent a line drive such that the acoustic member has a mechanical impedance which has a rising trend with bending wave frequency.

REFERENCES:
patent: 4532383 (1985-07-01), Willy
patent: 4847908 (1989-07-01), Nieuwendijk et al.
patent: 6694038 (2004-02-01), Azima
patent: 0 969 691 (2000-01-01), None
patent: WO 9709842 (1997-03-01), None
patent: WO 9709846 (1997-03-01), None
patent: WO 9839947 (1998-09-01), None
patent: WO 0033612 (2000-06-01), None
patent: WO 0065869 (2000-11-01), None
patent: WO 0105189 (2001-01-01), None
patent: WO 0147320 (2001-06-01), None
Philips Loudspeaker System Brochure, “Philips HiFi Ludsprekerboxen”; circa 1980; cover page.
Gontcharov et al.; NXT Technical Evaluation Report 0200; Philips 73mm Flat Midrange Driver; Type: AD 02170/SQ8; Jun. 29, 2004; pp. 1-7.
Colloms; Declaration of Martin Colloms Regarding 1980s Philips Loudspeaker Drive Unit; Jul. 13, 2004; pp. 1-4.

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