FR567695A - Improvements in hearing devices - Google Patents

Improvements in hearing devices

Info

Publication number
FR567695A
FR567695A FR567695DA FR567695A FR 567695 A FR567695 A FR 567695A FR 567695D A FR567695D A FR 567695DA FR 567695 A FR567695 A FR 567695A
Authority
FR
France
Prior art keywords
hearing devices
hearing
devices
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR567695A publication Critical patent/FR567695A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
FR567695D 1922-10-06 1923-06-21 Improvements in hearing devices Expired FR567695A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US592675A US1859892A (en) 1922-10-06 1922-10-06 Acoustic device

Publications (1)

Publication Number Publication Date
FR567695A true FR567695A (en) 1924-03-07

Family

ID=9817878

Family Applications (1)

Application Number Title Priority Date Filing Date
FR567695D Expired FR567695A (en) 1922-10-06 1923-06-21 Improvements in hearing devices

Country Status (3)

Country Link
US (1) US1859892A (en)
FR (1) FR567695A (en)
GB (2) GB216946A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3076520A (en) * 1959-05-21 1963-02-05 Claude C Farwell Loud speaker
US3985201A (en) * 1974-10-24 1976-10-12 Kloster Glenn R Infinite sound reproduction chamber
US4903308A (en) * 1988-02-10 1990-02-20 Linaeum Corporation Audio transducer with controlled flexibility diaphragm
US5198624A (en) * 1988-02-10 1993-03-30 Linaeum Corporation Audio transducer with controlled flexibility diaphragm
US20070251759A1 (en) * 2006-04-26 2007-11-01 Eric Neiman Bass speaker stand

Also Published As

Publication number Publication date
GB216946A (en) 1924-06-10
US1859892A (en) 1932-05-24
GB229786A (en) 1925-03-05

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