FR2244391A8 - Hearing aid with directional microphone - has device converting microphone lobe characteristic into spherical characteristic - Google Patents

Hearing aid with directional microphone - has device converting microphone lobe characteristic into spherical characteristic

Info

Publication number
FR2244391A8
FR2244391A8 FR7414920A FR7414920A FR2244391A8 FR 2244391 A8 FR2244391 A8 FR 2244391A8 FR 7414920 A FR7414920 A FR 7414920A FR 7414920 A FR7414920 A FR 7414920A FR 2244391 A8 FR2244391 A8 FR 2244391A8
Authority
FR
France
Prior art keywords
characteristic
aid
microphone
hearing aid
additional
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
FR7414920A
Other languages
French (fr)
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.)
GFELLER AG APPARATE FABRIK FLA
Original Assignee
GFELLER AG APPARATE FABRIK FLA
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
Priority claimed from DE19722249303 external-priority patent/DE2249303A1/en
Priority claimed from DE19732346531 external-priority patent/DE2346531A1/en
Application filed by GFELLER AG APPARATE FABRIK FLA filed Critical GFELLER AG APPARATE FABRIK FLA
Application granted granted Critical
Publication of FR2244391A8 publication Critical patent/FR2244391A8/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; 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
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/402—Arrangements for obtaining a desired directivity characteristic using contructional means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/004—Application hearing aid

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)

Abstract

The aid has a sound entry orifice facing forward. A switch is connected to the above switching device, controlling means determining the amplifier, frequency characteristic. The switch controls any one of the following: connects attenuators for lower frequencies; or an additional amplifier channel; or an additional treble boost at its position for directional reception, or connects additional electrical and/or acoustical filters or resonators, or it changes the hearing aid dynamic range as required. The aid avoids the sudden strengthening of the lower frequencies which usually happens on the closing of the second sound channel. An optimum reproduction over the complete audio range by means of a single apparatus is the chief object of the aid.
FR7414920A 1972-10-07 1974-04-29 Hearing aid with directional microphone - has device converting microphone lobe characteristic into spherical characteristic Expired FR2244391A8 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19722249303 DE2249303A1 (en) 1972-10-07 1972-10-07 Hearing aid for the severely handicapped or severely handicapped
DE19732346531 DE2346531A1 (en) 1973-09-15 1973-09-15 Hearing aid with directional microphone - has device converting microphone lobe characteristic into spherical characteristic

Publications (1)

Publication Number Publication Date
FR2244391A8 true FR2244391A8 (en) 1975-04-11

Family

ID=25763927

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7414920A Expired FR2244391A8 (en) 1972-10-07 1974-04-29 Hearing aid with directional microphone - has device converting microphone lobe characteristic into spherical characteristic

Country Status (1)

Country Link
FR (1) FR2244391A8 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0140078A1 (en) * 1983-09-21 1985-05-08 Siemens Aktiengesellschaft Hearing aid having a housing to be worn behind the ear
FR2598875A1 (en) * 1986-05-14 1987-11-20 Cabasse Georges Acoustic enclosure with variable tuning

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0140078A1 (en) * 1983-09-21 1985-05-08 Siemens Aktiengesellschaft Hearing aid having a housing to be worn behind the ear
US4638125A (en) * 1983-09-21 1987-01-20 Siemens Aktiengesellschaft Hearing aid with a housing to be worn behind the ear
FR2598875A1 (en) * 1986-05-14 1987-11-20 Cabasse Georges Acoustic enclosure with variable tuning

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