Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having electrostatic element
Patent
1997-09-04
1998-11-03
Tran, Sinh
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Having electrostatic element
381195, 381197, H04R 2500
Patent
active
058320962
ABSTRACT:
A loudspeaker including a voice coil and a counter coil connected in series to receive speaker signals. The counter coil is wrapped on the pole pieces in an opposite direction to the voice coil such that a first magnetic field generated by the voice coil is reduced by a second magnetic field generated by the counter coil. In addition, a stiffened and/or elongated voice coil support is provided to reduce distortion caused by a bowing effect of the voice coil due to a warped stationary magnetic field located in the air gap. An acoustically-transparent basket is also provided which minimizes reflected sound waves to further reduce distortion.
REFERENCES:
patent: 1814119 (1931-07-01), Bradbury
patent: 1830402 (1931-11-01), Miessner
patent: 1955248 (1934-04-01), Messick
patent: 1976874 (1934-10-01), Brzeski
patent: 2030574 (1936-02-01), Dull
patent: 2039856 (1936-05-01), Taber
patent: 2623127 (1952-12-01), Dreisbach et al.
patent: 2770681 (1956-11-01), Perry
patent: 3033945 (1962-05-01), Villchur
patent: 3073899 (1963-01-01), Farnsworth, III
patent: 3196211 (1965-07-01), Kessenich
patent: 3496307 (1970-02-01), Sotoma
patent: 3619673 (1971-11-01), Helms
patent: 3819876 (1974-06-01), Kinoshita
patent: 3935402 (1976-01-01), Gersten
patent: 4163876 (1979-08-01), Ohnuki
patent: 4220832 (1980-09-01), Nagel
patent: 4243839 (1981-01-01), Takahashi et al.
patent: 4259550 (1981-03-01), Nakamatsu
patent: 4373607 (1983-02-01), Miller
patent: 4573189 (1986-02-01), Hall
patent: 4933975 (1990-06-01), Button
patent: 5243662 (1993-09-01), Sogn et al.
patent: 5295194 (1994-03-01), Christensen
"Bobbin for Voice Coils", Jan. 1988.
Tran Sinh
Velodyne Acoustics Inc.
LandOfFree
Speaker containing dual coil does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Speaker containing dual coil, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speaker containing dual coil will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-699074