FR841086A - Earpiece horn for telephone receiver or mouthpiece for microphones - Google Patents

Earpiece horn for telephone receiver or mouthpiece for microphones

Info

Publication number
FR841086A
FR841086A FR841086DA FR841086A FR 841086 A FR841086 A FR 841086A FR 841086D A FR841086D A FR 841086DA FR 841086 A FR841086 A FR 841086A
Authority
FR
France
Prior art keywords
earpiece
mouthpiece
microphones
horn
telephone receiver
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)
Inventor
Jarnak Niels Paul Robert
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 filed Critical
Application granted granted Critical
Publication of FR841086A publication Critical patent/FR841086A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/20Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
FR841086D 1936-10-05 1938-07-25 Earpiece horn for telephone receiver or mouthpiece for microphones Expired FR841086A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK55033T 1936-10-05
FR841086T 1938-07-25

Publications (1)

Publication Number Publication Date
FR841086A true FR841086A (en) 1939-05-10

Family

ID=8142986

Family Applications (1)

Application Number Title Priority Date Filing Date
FR841086D Expired FR841086A (en) 1936-10-05 1938-07-25 Earpiece horn for telephone receiver or mouthpiece for microphones

Country Status (5)

Country Link
US (1) US2153044A (en)
CH (1) CH200196A (en)
DK (1) DK55033C (en)
FR (1) FR841086A (en)
GB (1) GB487566A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE847921C (en) * 1950-10-29 1952-08-28 Lab Wennebostel Dr Ing Sennhei Loudspeaker with pipeline
DE940167C (en) * 1953-07-01 1956-03-15 Carl Schmidbauer Speech device for a microphone that is insensitive to room noise and free of acoustic feedback
US3084229A (en) * 1960-03-11 1963-04-02 Ampex Electrostatic earphone
US4189627A (en) * 1978-11-27 1980-02-19 Bell Telephone Laboratories, Incorporated Electroacoustic transducer filter assembly

Also Published As

Publication number Publication date
GB487566A (en) 1938-06-22
US2153044A (en) 1939-04-04
CH200196A (en) 1938-09-30
DK55033C (en) 1938-08-01

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