FR821588A - Récepteurs téléphoniques ou analogues - Google Patents

Récepteurs téléphoniques ou analogues

Info

Publication number
FR821588A
FR821588A FR821588DA FR821588A FR 821588 A FR821588 A FR 821588A FR 821588D A FR821588D A FR 821588DA FR 821588 A FR821588 A FR 821588A
Authority
FR
France
Prior art keywords
telephone receivers
receivers
telephone
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
English (en)
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 FR821588A publication Critical patent/FR821588A/fr
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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
FR821588D 1936-09-16 1937-05-04 Récepteurs téléphoniques ou analogues Expired FR821588A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2521736A GB481740A (en) 1936-09-16 1936-09-16 Improvements in or relating to telephone receivers

Publications (1)

Publication Number Publication Date
FR821588A true FR821588A (fr) 1937-12-08

Family

ID=10224101

Family Applications (1)

Application Number Title Priority Date Filing Date
FR821588D Expired FR821588A (fr) 1936-09-16 1937-05-04 Récepteurs téléphoniques ou analogues

Country Status (2)

Country Link
FR (1) FR821588A (fr)
GB (1) GB481740A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE854670C (de) * 1948-10-02 1952-11-06 Electroacustic Ges M B H Daempfungseinrichtung von Telephonen und Mikrophonen

Also Published As

Publication number Publication date
GB481740A (en) 1938-03-16

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