CH567857A5 - - Google Patents

Info

Publication number
CH567857A5
CH567857A5 CH415374A CH415374A CH567857A5 CH 567857 A5 CH567857 A5 CH 567857A5 CH 415374 A CH415374 A CH 415374A CH 415374 A CH415374 A CH 415374A CH 567857 A5 CH567857 A5 CH 567857A5
Authority
CH
Switzerland
Application number
CH415374A
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
Application filed by Gfeller Ag Apparate Fabrik Fla filed Critical Gfeller Ag Apparate Fabrik Fla
Publication of CH567857A5 publication Critical patent/CH567857A5/xx

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)
  • Circuit For Audible Band Transducer (AREA)
CH415374A 1973-09-15 1974-03-26 CH567857A5 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732346531 DE2346531A1 (de) 1973-09-15 1973-09-15 Hoerhilfsgeraet fuer schwerhoerige oder hoerbehinderte

Publications (1)

Publication Number Publication Date
CH567857A5 true CH567857A5 (enrdf_load_stackoverflow) 1975-10-15

Family

ID=5892676

Family Applications (1)

Application Number Title Priority Date Filing Date
CH415374A CH567857A5 (enrdf_load_stackoverflow) 1973-09-15 1974-03-26

Country Status (2)

Country Link
CH (1) CH567857A5 (enrdf_load_stackoverflow)
DE (1) DE2346531A1 (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2634645C (en) 1999-06-16 2010-02-23 Erich Dittli Behind-the-ear hearing aid
US20010036287A1 (en) * 2000-03-15 2001-11-01 Beard John J. Combination acoustical and electrical switch for a directional microphone
US20020001391A1 (en) * 2000-03-16 2002-01-03 Resistance Technology, Inc. Acoustic switch with electronic switching capability
US7181035B2 (en) 2000-11-22 2007-02-20 Sonion Nederland B.V. Acoustical receiver housing for hearing aids
EP1248496A3 (en) 2001-04-04 2005-11-02 Sonionmicrotronic Nederland B.V. Aucoustic receiver having improved mechanical suspension
US7136497B2 (en) 2002-04-17 2006-11-14 Knowles Electronics, Llc. Acoustical switch for a directional microphone
US9859879B2 (en) 2015-09-11 2018-01-02 Knowles Electronics, Llc Method and apparatus to clip incoming signals in opposing directions when in an off state

Also Published As

Publication number Publication date
DE2346531A1 (de) 1975-04-03

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Legal Events

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