GB1213521A - Improvements in or relating to vocal aids - Google Patents

Improvements in or relating to vocal aids

Info

Publication number
GB1213521A
GB1213521A GB96968A GB96968A GB1213521A GB 1213521 A GB1213521 A GB 1213521A GB 96968 A GB96968 A GB 96968A GB 96968 A GB96968 A GB 96968A GB 1213521 A GB1213521 A GB 1213521A
Authority
GB
United Kingdom
Prior art keywords
output
microphone
sound source
loud
speaker
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB96968A
Inventor
Terence John Salmons
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GEORGE WASHINGTON Ltd
Original Assignee
GEORGE WASHINGTON Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GEORGE WASHINGTON Ltd filed Critical GEORGE WASHINGTON Ltd
Priority to GB96968A priority Critical patent/GB1213521A/en
Publication of GB1213521A publication Critical patent/GB1213521A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/17—Time-division multiplex systems in which the transmission channel allotted to a first user may be taken away and re-allotted to a second user if the first user becomes inactive, e.g. TASI
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L13/00—Speech synthesis; Text to speech systems
    • G10L13/02—Methods for producing synthetic speech; Speech synthesisers
    • G10L13/04—Details of speech synthesis systems, e.g. synthesiser structure or memory management

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

1,213,521. Dumb aid. GEORGE WASHING- TON Ltd. 31 March, 1969 [6 Jan., 1968], No. 969/68. Heading H4J. An unmodulated sound source is modulated by movement of a dumb person's lips, mouth and tongue and is amplified, while a differential amplifier cancels the unmodulated sound. A sound source I includes a random noise generator 1 and a loud-speaker 5 projects noise into a user's mouth when a mouthpiece 7 is held in front of the user's lips. A microphone 6 detects the user's speech signals. Its output is connected via a pre-amplifier 8 to one input of a differential amplifier 10, the other input of which is connected to the output of a push-pull amplifier 4 in the sound source I through a buffer stage 9. The output from the differential amplifier 10 is fed via an output stage 11 to a second loud-speaker 12. All components including a battery 13 are in a single housing 7 and a pressswitch 14 in a hand-grip incorporates a volume control, preferably of the two or three position type so that increased pressure means increased output. The output from the differential amplifier 10 is pure speech, the background of unmodulated speech being cancelled out. Thus the buffer stage 9 has a pre-set gain and is adjusted in phase and gain so that its output approximates as closely as possible to the background signal detected by the microphone. Instead of a buffer amplifier 9 there may be employed two separate microphones, one to detect the speech signals plus background and the other to detect background alone. Alternatively a stereophonic type microphone may be used. A single tone generator or buzzer may replace the sound source I. Output terminals for direct connection to a tape recorder or telephone adapter may be provided. The housing 7 may comprise a plastics mouthpiece with loud-speaker 5 and microphone 6 side by side but separated by a wall. A flexible shroud contacting the user's cheeks may be used out of doors. A coaxial construction of loud-speaker and microphone provides maximum sensitivity. The sound source is described in Specification 1,210,171.
GB96968A 1968-01-06 1968-01-06 Improvements in or relating to vocal aids Expired GB1213521A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB96968A GB1213521A (en) 1968-01-06 1968-01-06 Improvements in or relating to vocal aids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB96968A GB1213521A (en) 1968-01-06 1968-01-06 Improvements in or relating to vocal aids

Publications (1)

Publication Number Publication Date
GB1213521A true GB1213521A (en) 1970-11-25

Family

ID=9713713

Family Applications (1)

Application Number Title Priority Date Filing Date
GB96968A Expired GB1213521A (en) 1968-01-06 1968-01-06 Improvements in or relating to vocal aids

Country Status (1)

Country Link
GB (1) GB1213521A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061702A2 (en) * 1981-03-30 1982-10-06 Thomas Jefferson University Artificial larynx
US4502151A (en) * 1983-11-01 1985-02-26 Xomed, Inc. Replaceable saliva barrier for intra-oral larynx
US4502150A (en) * 1981-03-30 1985-02-26 Thomas Jefferson University Artificial larynx
US4539699A (en) * 1982-11-01 1985-09-03 Thomas Jefferson University Replaceable battery pack for intra-oral larynx
US4539698A (en) * 1982-11-01 1985-09-03 Thomas Jefferson University Replaceable saliva barrier for intra-oral larynx
US4547894A (en) * 1983-11-01 1985-10-15 Xomed, Inc. Replaceable battery pack for intra-oral larynx
US4550427A (en) * 1981-03-30 1985-10-29 Thomas Jefferson University Artificial larynx

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061702A2 (en) * 1981-03-30 1982-10-06 Thomas Jefferson University Artificial larynx
EP0061702A3 (en) * 1981-03-30 1983-02-09 Thomas Jefferson University Artificial larynx
US4473905A (en) * 1981-03-30 1984-09-25 Thomas Jefferson University Artificial larynx
US4502150A (en) * 1981-03-30 1985-02-26 Thomas Jefferson University Artificial larynx
US4550427A (en) * 1981-03-30 1985-10-29 Thomas Jefferson University Artificial larynx
US4539699A (en) * 1982-11-01 1985-09-03 Thomas Jefferson University Replaceable battery pack for intra-oral larynx
US4539698A (en) * 1982-11-01 1985-09-03 Thomas Jefferson University Replaceable saliva barrier for intra-oral larynx
US4502151A (en) * 1983-11-01 1985-02-26 Xomed, Inc. Replaceable saliva barrier for intra-oral larynx
US4547894A (en) * 1983-11-01 1985-10-15 Xomed, Inc. Replaceable battery pack for intra-oral larynx

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees