CA2034176A1 - Hearing aid - Google Patents
Hearing aidInfo
- Publication number
- CA2034176A1 CA2034176A1 CA2034176A CA2034176A CA2034176A1 CA 2034176 A1 CA2034176 A1 CA 2034176A1 CA 2034176 A CA2034176 A CA 2034176A CA 2034176 A CA2034176 A CA 2034176A CA 2034176 A1 CA2034176 A1 CA 2034176A1
- Authority
- CA
- Canada
- Prior art keywords
- rectifier circuit
- amplifier
- filter
- voltage
- circuit
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
- H04R25/502—Customised settings for obtaining desired overall acoustical characteristics using analog signal processing
Abstract
A single-channel circuit for a hearing aid for persons with an impaired hearing faculty, said circuit having a pre-amplifier and a final amplifier, a microphone and an earphone as well as a rectifier circuit for producing a control voltage for a voltage-dependent attenuator connected behind said pre-amplifier. In order to allow, concerning the audibility of speech, a favourable characteristic over the whole amplification range, it is provided that a voltage-controlled filter (4) is provided for a signal-dependent change in the frequency response with the control input of said filter being connected to the rectifier circuit (7), whereby said filter (4) is connected to said rectifier circuit via a time function element (t2), said rectifier circuit preferably being arranged as a full-wave rectifier circuit.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0022890A AT403978B (en) | 1990-02-02 | 1990-02-02 | SINGLE CHANNEL CIRCUIT FOR A HEARING AID |
ATA228/90 | 1990-02-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2034176A1 true CA2034176A1 (en) | 1991-08-03 |
CA2034176C CA2034176C (en) | 1997-07-15 |
Family
ID=3484961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002034176A Expired - Fee Related CA2034176C (en) | 1990-02-02 | 1991-01-15 | Hearing aid |
Country Status (6)
Country | Link |
---|---|
US (1) | US5255320A (en) |
EP (1) | EP0446195B1 (en) |
AT (1) | AT403978B (en) |
CA (1) | CA2034176C (en) |
DE (1) | DE59103455D1 (en) |
DK (1) | DK0446195T3 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT403978B (en) * | 1990-02-02 | 1998-07-27 | Viennatone Gmbh | SINGLE CHANNEL CIRCUIT FOR A HEARING AID |
US5537477A (en) * | 1994-02-07 | 1996-07-16 | Ensoniq Corporation | Frequency characteristic shaping circuitry and method |
AT401129B (en) * | 1994-12-21 | 1996-06-25 | Viennatone Gmbh | HEARING AID |
US5862238A (en) * | 1995-09-11 | 1999-01-19 | Starkey Laboratories, Inc. | Hearing aid having input and output gain compression circuits |
US20060147060A1 (en) * | 2004-12-30 | 2006-07-06 | Plantronics, Inc. A Delaware Corporation | Multifunction preamplifier microphone |
CN103458349A (en) * | 2013-09-22 | 2013-12-18 | 北京九鹤科技有限公司 | Hearing assisting system |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3571529A (en) * | 1968-09-09 | 1971-03-16 | Zenith Radio Corp | Hearing aid with frequency-selective agc |
US3818149A (en) * | 1973-04-12 | 1974-06-18 | Shalako Int | Prosthetic device for providing corrections of auditory deficiencies in aurally handicapped persons |
AT371306B (en) * | 1981-11-03 | 1983-06-27 | Siemens Ag | HOERGERAET |
FR2522451B1 (en) * | 1982-03-01 | 1988-10-14 | Audibel | IMPROVEMENT IN THE AUTOMATIC GAIN CONTROL CIRCUIT OF A TRANSISTOR AMPLIFICATION SYSTEM AND HEARING CORRECTION APPARATUS PROVIDED WITH SUCH A CIRCUIT |
DE3230327A1 (en) * | 1982-08-14 | 1984-03-01 | Heinrich Drexl KG, 8913 Schondorf | Air heating system |
JPS61295711A (en) * | 1985-06-24 | 1986-12-26 | Hitachi Ltd | Tone quality control circuit for playing device |
US4792977A (en) * | 1986-03-12 | 1988-12-20 | Beltone Electronics Corporation | Hearing aid circuit |
US4790018A (en) * | 1987-02-11 | 1988-12-06 | Argosy Electronics | Frequency selection circuit for hearing aids |
AT403978B (en) * | 1990-02-02 | 1998-07-27 | Viennatone Gmbh | SINGLE CHANNEL CIRCUIT FOR A HEARING AID |
-
1990
- 1990-02-02 AT AT0022890A patent/AT403978B/en not_active IP Right Cessation
-
1991
- 1991-01-15 CA CA002034176A patent/CA2034176C/en not_active Expired - Fee Related
- 1991-01-23 US US07/644,911 patent/US5255320A/en not_active Expired - Fee Related
- 1991-01-28 EP EP91890015A patent/EP0446195B1/en not_active Revoked
- 1991-01-28 DE DE59103455T patent/DE59103455D1/en not_active Expired - Fee Related
- 1991-01-28 DK DK91890015.0T patent/DK0446195T3/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
DK0446195T3 (en) | 1994-12-05 |
DE59103455D1 (en) | 1994-12-15 |
EP0446195A2 (en) | 1991-09-11 |
EP0446195A3 (en) | 1992-11-25 |
US5255320A (en) | 1993-10-19 |
AT403978B (en) | 1998-07-27 |
EP0446195B1 (en) | 1994-11-09 |
CA2034176C (en) | 1997-07-15 |
ATA22890A (en) | 1994-04-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |