Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Patent
1990-02-21
1992-09-15
Isen, Forester W.
Electrical audio signal processing systems and devices
Hearing aids, electrical
Specified casing or housing
381204, 381 99, H04R 2500
Patent
active
051484935
ABSTRACT:
A dipole loudspeaker includes a rigid support containing an opening and a generally planar multi-layered flexible diaphragm mounted on the support and extending across the opening. The diaphragm is formed of a plurality of layers of thin flexible membrane material, each of the layers having a different height and containing a thin electrical conductor arranged in a predetermined pattern on one surface thereof. The conductor patterns on each of the membranes have different masses, whereby the membrane defines along its height areas of various thickness and varying mass whereby the membrane is suitable for more accurately reproducing or generating high and low frequencies when the electrical conductors are connected with a source of sound signal currents. A plurality of magnets are mounted in spaced relation opposite at least one surface of the membrane and the conductor patterns for vibrating the membrane to reproduce the sound in response to the sound signal currents through the conductor. The membrane and support are also designed to provide directionality and an accurate three-dimensional image of sound.
REFERENCES:
patent: 4410063 (1983-10-01), Yasue et al.
patent: 4597100 (1986-06-01), Grodinsky et al.
patent: 4653103 (1987-03-01), Mori et al.
patent: 4703509 (1987-10-01), Kanchev
patent: 4924504 (1990-05-01), Burton
Lafayette Catalog 700 (1970), p. 55, Speakers 21E47189 and 99E01174.
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