FR604032A - Instrument for hard of hearing people - Google Patents

Instrument for hard of hearing people

Info

Publication number
FR604032A
FR604032A FR604032DA FR604032A FR 604032 A FR604032 A FR 604032A FR 604032D A FR604032D A FR 604032DA FR 604032 A FR604032 A FR 604032A
Authority
FR
France
Prior art keywords
instrument
hard
hearing people
hearing
people
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
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Application granted granted Critical
Publication of FR604032A publication Critical patent/FR604032A/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
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/02—Transducers using more than one principle simultaneously

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Telephone Set Structure (AREA)
FR604032D 1925-08-27 1925-09-08 Instrument for hard of hearing people Expired FR604032A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES71274D DE460940C (en) 1925-08-27 1925-08-27 Portable hearing aid device with amplifier arrangement

Publications (1)

Publication Number Publication Date
FR604032A true FR604032A (en) 1926-04-28

Family

ID=5966502

Family Applications (1)

Application Number Title Priority Date Filing Date
FR604032D Expired FR604032A (en) 1925-08-27 1925-09-08 Instrument for hard of hearing people

Country Status (4)

Country Link
US (1) US1709747A (en)
DE (1) DE460940C (en)
FR (1) FR604032A (en)
GB (1) GB257563A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2673898A (en) * 1951-06-01 1954-03-30 Sonotone Corp Wearable hearing aid having external microphone with penetrating pin connector structure
DE1114731B (en) * 1957-10-16 1961-10-05 Wasagchemie Ag Disposable piston valve for spray fluid delivery lines

Also Published As

Publication number Publication date
DE460940C (en) 1928-06-12
US1709747A (en) 1929-04-16
GB257563A (en) 1926-12-02

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