Apparatus for on-ear operation and off-ear operation with two sound reproduction transducers
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United States of America Patent
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-
Sep 30, 2003
Grant Date -
N/A
app pub date -
Aug 28, 2000
filing date -
Aug 31, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In an adapted to be used in an on-ear mode and in an off-ear mode a holder compartment (6)accommodates a first transducer (20)and a second transducer (25)and the holder compartment (6)is bounded by a bounding wall (7)formed with internal sound ports (10, 11)and at least one additional internal sound port (22), and an outer wall (3)formed with external sound ports (15, 16)is spaced at a distance from the bounding wall (7), and at least one additional external sound port (19)is provided between the bounding wall (7)and the outer wall (3), and the two transducers (20, 25)can be driven with useful signals of the same phase in the off-ear mode and with useful signals of opposite phase in the on-ear mode.
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