FR1032378A - Perfectionnements aux écouteurs téléphoniques - Google Patents

Perfectionnements aux écouteurs téléphoniques

Info

Publication number
FR1032378A
FR1032378A FR1032378DA FR1032378A FR 1032378 A FR1032378 A FR 1032378A FR 1032378D A FR1032378D A FR 1032378DA FR 1032378 A FR1032378 A FR 1032378A
Authority
FR
France
Prior art keywords
telephone headsets
headsets
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)
Inventor
V Gavreau
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.)
Centre National de la Recherche Scientifique CNRS
Original Assignee
Centre National de la Recherche Scientifique CNRS
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 Centre National de la Recherche Scientifique CNRS filed Critical Centre National de la Recherche Scientifique CNRS
Application granted granted Critical
Publication of FR1032378A publication Critical patent/FR1032378A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor
    • 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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Telephone Set Structure (AREA)
FR1032378D 1951-02-13 1951-02-13 Perfectionnements aux écouteurs téléphoniques Expired FR1032378A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1032378T 1951-02-13

Publications (1)

Publication Number Publication Date
FR1032378A true FR1032378A (fr) 1953-07-01

Family

ID=9583753

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1032378D Expired FR1032378A (fr) 1951-02-13 1951-02-13 Perfectionnements aux écouteurs téléphoniques

Country Status (2)

Country Link
US (1) US2757247A (fr)
FR (1) FR1032378A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1112118B (de) * 1958-08-29 1961-08-03 Siemens Ag Hoerer, insbesondere Zweithoerer fuer Fernsprechstationen

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3112005A (en) * 1960-07-28 1963-11-26 Ca Nat Research Council Earphones
US3134456A (en) * 1960-02-04 1964-05-26 Clark Co Inc David Wide range communication and sound attenuation device
DE3538054C3 (de) * 1985-10-25 1997-01-23 Siemens Ag Innerhalb eines Handapparates eines Fernsprechgerätes angeordneter elektroakustischer Wandler
US20080263749A1 (en) * 2007-04-30 2008-10-30 Kimberly-Clark Worldwide, Inc. Bandless hearing protection muffs
US7717226B2 (en) * 2008-02-20 2010-05-18 Kimberly-Clark Worldwide, Inc. Hearing protection cap
CN115396760B (zh) * 2021-05-20 2025-05-09 英业达科技有限公司 扬声器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1396771A (en) * 1918-03-27 1921-11-15 Western Electric Co Receiver-shield
US1558191A (en) * 1924-12-27 1925-10-20 Lindemann Bruno Earpiece
GB274511A (en) * 1926-07-16 1928-07-19 Parnell Rabbidge Improvements in wireless telephone receivers
DE639189C (de) * 1931-10-31 1936-11-30 Siemens App Telephonhoerer zur Verwendung in geraeuschvoller Umgebung, insbesondere in Flugzeugen
US2593892A (en) * 1950-04-05 1952-04-22 Elmore A Kindel Earpiece

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1112118B (de) * 1958-08-29 1961-08-03 Siemens Ag Hoerer, insbesondere Zweithoerer fuer Fernsprechstationen

Also Published As

Publication number Publication date
US2757247A (en) 1956-07-31

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