Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Patent
1983-08-30
1985-03-12
Rubinson, Gene Z.
Electrical audio signal processing systems and devices
Hearing aids, electrical
Specified casing or housing
381117, H04R 308
Patent
active
045047049
ABSTRACT:
A dynamic loudspeaker unit having a voice coil formed with two windings in which a capacitor is connected in series to a parallel circuit, one circuit arm being composed of a series circuit of one of the two windings and an inductor and the other circuit arm being composed of the remaining winding. The dynamic loudspeaker unit thus constructed is housed in a bass-reflex type cabinet, whereby a shoulder characteristic having a large Q in a bass zone can be obtained, and due to a combination of the inductor and the capacitor, a desired lowest resonance frequency lower than an actual lowest resonance frequency can be selected. Thus, the reproducible bass range can be extended.
REFERENCES:
patent: 2007746 (1935-07-01), Ringel
patent: 2007748 (1935-07-01), Olson
patent: 2007749 (1935-07-01), Anderson
patent: 3055991 (1962-09-01), Guss
patent: 3838216 (1974-09-01), Watkins
patent: 4201886 (1980-05-01), Nagel
patent: 4335274 (1982-06-01), Ayers
Kamishima Minoru
Kawamura Tetsuo
Kinoshita Shozo
Matsuhisa Hiroaki
Ohyaba Takashi
Pioneer Electronic Corporation
Rubinson Gene Z.
Schroeder L. C.
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