GB1213521A - Improvements in or relating to vocal aids - Google Patents
Improvements in or relating to vocal aidsInfo
- 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
Links
- 230000001755 vocal effect Effects 0.000 title 1
- 238000010276 construction Methods 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 abstract 1
- 239000004033 plastic Substances 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0061702A2 (en) * | 1981-03-30 | 1982-10-06 | Thomas Jefferson University | Artificial larynx |
US4502150A (en) * | 1981-03-30 | 1985-02-26 | Thomas Jefferson University | Artificial larynx |
US4502151A (en) * | 1983-11-01 | 1985-02-26 | Xomed, Inc. | Replaceable saliva barrier for intra-oral 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 |
-
1968
- 1968-01-06 GB GB96968A patent/GB1213521A/en not_active Expired
Cited By (9)
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 |