GB1499976A - Hearing aids - Google Patents

Hearing aids

Info

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
Application number
GB4830173A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB4830173A priority Critical patent/GB1499976A/en
Publication of GB1499976A publication Critical patent/GB1499976A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • 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.
GB4830173A 1973-10-17 1973-10-17 Hearing aids Expired GB1499976A (en)

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 (4)

* Cited by examiner, † Cited by third party
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
RU2191485C2 (en) * 1994-12-29 2002-10-20 Децибел Инструментс, Инк. Hinge-type hearing aid
US7046813B1 (en) 1997-09-25 2006-05-16 Fumio Denda Auditory sense training method and sound processing method for auditory sense training

Cited By (5)

* Cited by examiner, † Cited by third party
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
RU2191485C2 (en) * 1994-12-29 2002-10-20 Децибел Инструментс, Инк. Hinge-type hearing aid
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