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(11) | EP 1 032 243 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | A stereophonic earphone apparatus |
| (57) A stereophonic earphone apparatus is disclosed for incanal of a user thereof. The
apparatus includes a housing which has a first and a second end and which defines
an enclosure. An electroacoustic transducer is disposed within the enclosure and a
diaphragm is disposed within the enclosure adjacent to the transducer. A resilient
anchor having a first and a second extremity is arranged such that the first extremity
is removably secured to and extends from a cover of the housing. The anchor is fabricated
from a hydrophilic urethane foam having a skinned over outer surface such that when
the anchor is compressed, insertion of the anchor within the ear canal is permitted.
The foam has a shape restoration memory such that after insertion of the anchor within
the ear canal, the foam gradually expands so that the skinned over surface thereof
comes into intimate contact with the ear canal so that the apparatus is secured within
the ear canal. A tube extends from the cover and is disposed within a passageway defined
by the anchor. The tube has an inner and an outer face such that the outer face of
the tube extends contiguously along the passageway so that the tube prevents obturation
of the passageway while permitting a transmission of sound waves from the diaphragm
into the ear canal.
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