GB1499976A - Hearing aids - Google Patents
Hearing aidsInfo
- Publication number
- GB1499976A GB1499976A GB4830173A GB4830173A GB1499976A GB 1499976 A GB1499976 A GB 1499976A GB 4830173 A GB4830173 A GB 4830173A GB 4830173 A GB4830173 A GB 4830173A GB 1499976 A GB1499976 A GB 1499976A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- variable attenuators
- microphone
- receiver
- hearing aid
- 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
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
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)
- Headphones And Earphones (AREA)
Abstract
1499976 Hearing aid circuits J R J RUTHERFORD 16 Jan 1975 [17 Oct 1973] 48301/73 Heading H4J A hearing aid comprises a microphone 5 (Fig. 1) connected to a plurality of parallel connected band-pass filters 4 having respective variable attenuators 3 which can be preset and locked so that the resultant signal response is adjusted to the needs of the user. The resultant signals are applied to the input of an amplifier 2 having a user operated volume control. The amplifier output is applied to a receiver 1. Microcircuitry is preferably used and the bandpass filters, together with their respective variable attenuators, and the amplifier are of module form for ease of servicing or replacement. The microphone, the bandpass filters together with their variable attenuators, and the amplifier are in a common housing which also contains a battery space. The receiver may be in the housing or in a separate earpiece, and is connected by leads to the amplifier output.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4830173A GB1499976A (en) | 1973-10-17 | 1973-10-17 | Hearing aids |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4830173A GB1499976A (en) | 1973-10-17 | 1973-10-17 | Hearing aids |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1499976A true GB1499976A (en) | 1978-02-01 |
Family
ID=10448135
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4830173A Expired GB1499976A (en) | 1973-10-17 | 1973-10-17 | Hearing aids |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1499976A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2629661A1 (en) * | 1988-03-31 | 1989-10-06 | Steiner Francois | Enhancement to auditory apparatuses by addition of an equalizer |
EP1031955A1 (en) * | 1997-09-25 | 2000-08-30 | Fumio Denda | Auditory sense training method and sound processing method for auditory sense training |
US7046813B1 (en) | 1997-09-25 | 2006-05-16 | Fumio Denda | Auditory sense training method and sound processing method for auditory sense training |
-
1973
- 1973-10-17 GB GB4830173A patent/GB1499976A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2629661A1 (en) * | 1988-03-31 | 1989-10-06 | Steiner Francois | Enhancement to auditory apparatuses by addition of an equalizer |
EP1031955A1 (en) * | 1997-09-25 | 2000-08-30 | Fumio Denda | Auditory sense training method and sound processing method for auditory sense training |
US7046813B1 (en) | 1997-09-25 | 2006-05-16 | Fumio Denda | Auditory sense training method and sound processing method for auditory sense training |
US7227961B2 (en) | 1997-09-25 | 2007-06-05 | Fumio Denda | Auditory sense training method and sound processing method for auditory sense training |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19950115 |