FR622950A - Device to reinforce the sound in telephony by microphones - Google Patents

Device to reinforce the sound in telephony by microphones

Info

Publication number
FR622950A
FR622950A FR622950DA FR622950A FR 622950 A FR622950 A FR 622950A FR 622950D A FR622950D A FR 622950DA FR 622950 A FR622950 A FR 622950A
Authority
FR
France
Prior art keywords
telephony
microphones
reinforce
sound
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
Heinrich Kuchenmeister
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 FR622950A publication Critical patent/FR622950A/en
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
    • H04M1/04—Supports for telephone transmitters or receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
FR622950D 1925-10-13 1926-10-12 Device to reinforce the sound in telephony by microphones Expired FR622950A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE259947X 1925-10-13

Publications (1)

Publication Number Publication Date
FR622950A true FR622950A (en) 1927-06-09

Family

ID=5966941

Family Applications (1)

Application Number Title Priority Date Filing Date
FR622950D Expired FR622950A (en) 1925-10-13 1926-10-12 Device to reinforce the sound in telephony by microphones

Country Status (4)

Country Link
US (1) US1789104A (en)
FR (1) FR622950A (en)
GB (1) GB259947A (en)
NL (1) NL19330C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4768614A (en) * 1986-11-28 1988-09-06 Case Eliot M Unidirectional enhancer for microphones
FR3047382B1 (en) * 2016-02-02 2020-01-31 Viga Music Tools METHOD AND DEVICE FOR TAKING SOUND IN A WIND INSTRUMENT

Also Published As

Publication number Publication date
NL19330C (en)
GB259947A (en) 1927-02-03
US1789104A (en) 1931-01-13

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