Wireless headphone

Details Wireless headphone Wireless headphone

1990-03-14

1992-03-10

Eisenzopf, Reinhard J.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

381 25, 320 2, H04B 1000

Patent

active

050953826

ABSTRACT:
A wireless headphone in which an infra-red light signal transmitted from a transmitting apparatus is received and reproduced as an audible sound by a headphone unit portion. A first light receiving element is provided on a top portion of a head band portion of the headphone so that, when a listener wears the wireless headphone, a light receiving surface included in the first light receiving element is directed rearward. Second and third light receiving elements are provided on the pair of headphone unit portions so that, when the listener wears the wireless headphone light receiving surfaces included in the second and third light receiving elements are directed forward.

REFERENCES:
patent: 4229829 (1980-10-01), Grunwald
patent: 4543665 (1985-09-01), Sotelo et al.
patent: 4633498 (1986-12-01), Warnke et al.
patent: 4647832 (1987-03-01), Fenne et al.
patent: 4845751 (1989-07-01), Schwab
patent: 4899388 (1990-02-01), Mlodzikowski et al.
patent: 4930148 (1990-05-01), Lee
Patent Associated Literature, Funkschau, vol. 48, No. 24, pp. 1063-1066, 19 Nov. 1976.

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