CH558997A - Hoerhilfsgeraet fuer hoerbehinderte. - Google Patents

Hoerhilfsgeraet fuer hoerbehinderte.

Info

Publication number
CH558997A
CH558997A CH1426373A CH1426373A CH558997A CH 558997 A CH558997 A CH 558997A CH 1426373 A CH1426373 A CH 1426373A CH 1426373 A CH1426373 A CH 1426373A CH 558997 A CH558997 A CH 558997A
Authority
CH
Switzerland
Prior art keywords
hoer
disabled
aid device
aid
hoer aid
Prior art date
Application number
CH1426373A
Other languages
English (en)
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 CH558997A publication Critical patent/CH558997A/de

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
    • H04R25/40—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; ELECTRIC HEARING AIDS; 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)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
CH1426373A 1972-10-07 1973-10-05 Hoerhilfsgeraet fuer hoerbehinderte. CH558997A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722249303 DE2249303A1 (de) 1972-10-07 1972-10-07 Hoerhilfsgeraet fuer schwerhoerige oder hoerbehinderte

Publications (1)

Publication Number Publication Date
CH558997A true CH558997A (de) 1975-02-14

Family

ID=5858474

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1426373A CH558997A (de) 1972-10-07 1973-10-05 Hoerhilfsgeraet fuer hoerbehinderte.

Country Status (3)

Country Link
CH (1) CH558997A (de)
DE (1) DE2249303A1 (de)
FR (1) FR2202630A7 (de)

Also Published As

Publication number Publication date
FR2202630A7 (de) 1974-05-03
DE2249303A1 (de) 1974-04-18

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Legal Events

Date Code Title Description
PL Patent ceased