GB1161002A - Improvements in and relating to Hearing Aids - Google Patents
Improvements in and relating to Hearing AidsInfo
- Publication number
- GB1161002A GB1161002A GB5353266A GB5353266A GB1161002A GB 1161002 A GB1161002 A GB 1161002A GB 5353266 A GB5353266 A GB 5353266A GB 5353266 A GB5353266 A GB 5353266A GB 1161002 A GB1161002 A GB 1161002A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistor
- compression
- amplifier
- feedback circuit
- diodes
- 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
- 230000006835 compression Effects 0.000 abstract 3
- 238000007906 compression Methods 0.000 abstract 3
- 230000003321 amplification Effects 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
- H03G7/06—Volume compression or expansion in amplifiers having semiconductor devices
- H03G7/08—Volume compression or expansion in amplifiers having semiconductor devices incorporating negative feedback
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
- H03G7/001—Volume compression or expansion in amplifiers without controlling loop
-
- 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
- H04R25/35—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using translation techniques
- H04R25/356—Amplitude, e.g. amplitude shift or compression
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Neurosurgery (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Abstract
1,161,002. Nonlinear circuits. ROYAL INDUSTRIES Inc. 30 Nov., 1966 [21 Feb., 1966], No. 53532/66. Heading G4G. [Also in Division H4] A hearing aid comprises microphone 10, preamplifier 11 and volume control 13 capacitance coupled to output transducer 14 through a curvilinear compression amplifier 12 comprising transistor 15 having a logarithmic feedback circuit, wherein the collector and base are inter-connected by resistor 18 in parallel with a resistor 21 in series with capacitor 24 and parallel oppositely connected diodes 22, 23; resistor 21 being proportioned for linear amplification up to a predetermined level, above which the diodes progressively conduct and impose increasing feedback on the amplifier, so that the overall response is one of curvilinear compression (Fig. 3, not shown). In a modification (Fig. 2, not shown), the degree of compression is made adjustable by energizing the feedback circuit through an adjustable potentiometer.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US52907466A | 1966-02-21 | 1966-02-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1161002A true GB1161002A (en) | 1969-08-13 |
Family
ID=24108421
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5353266A Expired GB1161002A (en) | 1966-02-21 | 1966-11-30 | Improvements in and relating to Hearing Aids |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1487399A1 (en) |
FR (1) | FR1513655A (en) |
GB (1) | GB1161002A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2167823A1 (en) * | 1972-01-08 | 1973-08-24 | Akai Electric | |
FR2276756A1 (en) * | 1974-06-24 | 1976-01-23 | Audibel | Automatic level control for microphone amplifier - uses series transistor with its base polarisation varying with output |
FR2416610A2 (en) * | 1978-02-07 | 1979-08-31 | Audibel | Hearing aid signal correction device - has transistor collector-emitter shunt resistor to reduce transfer resistance and increase input signal range |
GB2152785A (en) * | 1982-05-28 | 1985-08-07 | British Broadcasting Corp | Headphone level protection circuit |
GB2224413A (en) * | 1988-10-28 | 1990-05-02 | Andrew David Patrick Godfrey | Electronic hearing aid |
EP0392312A1 (en) * | 1989-04-14 | 1990-10-17 | Siemens Audiologische Technik GmbH | Amplifier for hearing aid |
-
1966
- 1966-11-30 GB GB5353266A patent/GB1161002A/en not_active Expired
- 1966-12-22 DE DE19661487399 patent/DE1487399A1/en active Pending
-
1967
- 1967-01-25 FR FR92476A patent/FR1513655A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2167823A1 (en) * | 1972-01-08 | 1973-08-24 | Akai Electric | |
FR2276756A1 (en) * | 1974-06-24 | 1976-01-23 | Audibel | Automatic level control for microphone amplifier - uses series transistor with its base polarisation varying with output |
FR2416610A2 (en) * | 1978-02-07 | 1979-08-31 | Audibel | Hearing aid signal correction device - has transistor collector-emitter shunt resistor to reduce transfer resistance and increase input signal range |
GB2152785A (en) * | 1982-05-28 | 1985-08-07 | British Broadcasting Corp | Headphone level protection circuit |
GB2224413A (en) * | 1988-10-28 | 1990-05-02 | Andrew David Patrick Godfrey | Electronic hearing aid |
GB2224413B (en) * | 1988-10-28 | 1993-01-13 | Andrew David Patrick Godfrey | Electronic hearing aid |
EP0392312A1 (en) * | 1989-04-14 | 1990-10-17 | Siemens Audiologische Technik GmbH | Amplifier for hearing aid |
Also Published As
Publication number | Publication date |
---|---|
DE1487399A1 (en) | 1969-04-03 |
FR1513655A (en) | 1968-02-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |