Telephonic communications – Including aid for handicapped user
Patent
1992-12-21
1994-03-01
Chan, Wing F.
Telephonic communications
Including aid for handicapped user
379 99, 379443, H04M 1100
Patent
active
052915417
ABSTRACT:
Coupling apparatus for a telephone handset comprises a handset-coupling cradle having a dome at one end thereof for locating the earpiece (receiver) of the handset, and sound ports at the other end of the cradle in the region where the mouthpiece (microphone) of the handset resides. The handset-coupling cradle is shaped to accommodate a variety of different handset styles. An inductive sensor is mounted within the dome and it responds to electromagnetic fields generated by the handset receiver. Such a sensor eliminates the need to closely couple the receiver to the apparatus. A low acoustic impedance loudspeaker is mounted beneath the sound ports for acoustically coupling signals to the handset's microphone. Such a loudspeaker eliminates the need to closely couple the microphone to the apparatus.
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patent: 3553374 (1971-01-01), Wolf et al.
patent: 3585302 (1971-06-01), Swan, Jr.
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AT&T National Special Service Needs Center, TDD advertisement, Hearing Instruments vol. 37, No. 5, May 1986, p. 81.
Gibler Clinton D.
Marcus Larry A.
Rosebrock Frederick A.
White Perry K.
AT&T Bell Laboratories
Chan Wing F.
Morra Michael A.
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