1976-02-03
1978-08-29
Cooper, William C.
179182R, H04M 105, H04R 500
Patent
active
041105834
ABSTRACT:
In an earphone construction an axially extending tubular shaped member forms a passageway or listening channel with an ear opening located between the ends of the member. A sound source is positioned in the passageway, spaced from the ear opening, for directing sound in the axial direction of the tubular member so that it flows past the ear opening. The tubular member can be U-shaped forming a headset with two ear openings or separate tubular members each with an ear opening can be joined together by a band or the like to form a headset. The ear openings can have different shapes and additional sound outlet openings, spaced from the ear openings, can be provided in the tubular member. If a U-shaped tubular member is used, the passageway between the ear openings can be open, restricted by a movable throttle or blocked by a wall.
REFERENCES:
patent: 1554119 (1925-09-01), Morgan
patent: 1696304 (1928-12-01), Hutchison
patent: 1784596 (1930-12-01), Hutchison
patent: 3592978 (1971-07-01), Hess
patent: 3609240 (1971-09-01), Fixler
patent: 3863028 (1975-01-01), Fixler
patent: 3939310 (1976-02-01), Hodges
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