Electrical audio signal processing systems and devices – Binaural and stereophonic – Hearing aid
Patent
1986-11-06
1988-08-16
Isen, Forester W.
Electrical audio signal processing systems and devices
Binaural and stereophonic
Hearing aid
381 90, 381205, 381188, H04R 502
Patent
active
047649615
ABSTRACT:
A cassette type stereo speaker system comprises a body case, a screen, a vibrating sheet, a voice coil, a magnetic path system and a plug. The magnetic path system includes a yoke iron, a center magnet, and a ferrite magnet. The vibrating sheet is a very thin sheet to be mounted over the voice coil. The whole speaker system has the features of being simple in structure, and being convenient to a user to carry or to store it.
REFERENCES:
patent: 3991369 (1976-11-01), Fujimoto
patent: 4303807 (1981-12-01), Sato
patent: 4365280 (1982-12-01), Crosetti et al.
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