Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
Patent
1994-02-01
1995-05-30
Kuntz, Curtis
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Plural or compound reproducers
381187, 379431, H04R 2500
Patent
active
054209358
ABSTRACT:
A headphone includes an electro-acoustic transducer, a housing, and first, second and third members. The electro-acoustic transducer includes a diaphragm and is supplied with a signal through a cord. The housing is shaped in such a way as to be accommodated into a concave portion of an auricle and includes an accommodating portion in which the electro-acoustic transducer is accommodated and a projecting portion for leading the cord from the inside of the housing to the outside of the housing. The accommodating portion has a first opening so that the electro-acoustic transducer is exposed to the outside from the first opening. The projecting portion is formed on the rear surface of the accommodating portion. A first member is provided so as to cover the whole surface of the diaphragm and the first opening and is made of a metal material. The first member has a plurality of first openings. A second member is provided on the first member so as to cover the first member and is made of a synthetic resin material. The second member has a plurality of second openings whose diameters are smaller than those of the first openings. A third member is attached to the housing so as to cover the housing having the second member attached at a portion in which the first opening is formed, and is made of an elastic material. The third member has a second opening which is smaller than the first opening.
REFERENCES:
patent: 2293078 (1942-08-01), Proctor
patent: 2346226 (1944-04-01), Marlow
patent: 2423014 (1947-06-01), Gilman
patent: 4058688 (1977-11-01), Nishimura et al.
patent: 4429194 (1984-01-01), Kamon et al.
patent: 4646872 (1987-03-01), Kamon et al.
patent: 4736435 (1988-04-01), Yokoyama et al.
Katayama Kenichi
Nageno Koji
Shinohara Ikuo
Kuntz Curtis
Le Huyen D.
Maioli Jay H.
Sony Corporation
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