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Telephone Set With an Acoustically Coupled Handset

IP.com Disclosure Number: IPCOM000046840D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Jacquart, C: AUTHOR

Abstract

In order to simplify the telephone set/handset assembly, the audio transducers of a conventional handset, i.e., microphone and earphone, are mounted in the telephone set itself. Acoustic vibrations generated by the mouth of the speaker are transmitted through a specially designed handset 10, and along acoustic cord 12 to microphone 15 located in telephone set 11. Conversely, transducer 16, also located in set 11, generates acoustic vibrations propagated through cord 12 and handset 10 to the ear of the speaker. Cord 12 comprises 2 tubes 17, 18 transmitting vibrations between the speaker and transducers 15, 16. Both tubes are acoustically isolated from one another and of a design that prevents them from collecting acoustic vibrations other than those produced by the speaker and collected through the handset.

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Telephone Set With an Acoustically Coupled Handset

In order to simplify the telephone set/handset assembly, the audio transducers of a conventional handset, i.e., microphone and earphone, are mounted in the telephone set itself. Acoustic vibrations generated by the mouth of the speaker are transmitted through a specially designed handset 10, and along acoustic cord 12 to microphone 15 located in telephone set 11. Conversely, transducer 16, also located in set 11, generates acoustic vibrations propagated through cord 12 and handset 10 to the ear of the speaker. Cord 12 comprises 2 tubes 17, 18 transmitting vibrations between the speaker and transducers 15, 16. Both tubes are acoustically isolated from one another and of a design that prevents them from collecting acoustic vibrations other than those produced by the speaker and collected through the handset. Cord 12 is mechanically connected to telephone set 11 by means of plug 14 which further provides the acoustic coupling of tubes 17, 18 to transducers 15, 16. The transducers are of the electrostatic (electret) type for the microphone, and of the electrodynamic type for the earphone. The handset is of a simple moulded plastic assembly.

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