FR56979E - Microphones différentiels - Google Patents

Microphones différentiels

Info

Publication number
FR56979E
FR56979E FR56979DA FR56979E FR 56979 E FR56979 E FR 56979E FR 56979D A FR56979D A FR 56979DA FR 56979 E FR56979 E FR 56979E
Authority
FR
France
Prior art keywords
differential microphones
microphones
differential
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.)
SIF Societe Independante de Telegraphie Sans Fil
Original Assignee
SIF Societe Independante de Telegraphie Sans Fil
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 SIF Societe Independante de Telegraphie Sans Fil filed Critical SIF Societe Independante de Telegraphie Sans Fil
Application granted granted Critical
Publication of FR56979E publication Critical patent/FR56979E/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/08—Microphones

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
FR56979D 1944-04-21 1945-07-31 Microphones différentiels Expired FR56979E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR991650T 1944-04-21

Publications (1)

Publication Number Publication Date
FR56979E true FR56979E (fr) 1952-10-10

Family

ID=9553844

Family Applications (3)

Application Number Title Priority Date Filing Date
FR991650D Expired FR991650A (fr) 1944-04-21 1944-04-21 Microphones différentiels
FR56404D Expired FR56404E (fr) 1944-04-21 1945-03-09 Microphones différentiels
FR56979D Expired FR56979E (fr) 1944-04-21 1945-07-31 Microphones différentiels

Family Applications Before (2)

Application Number Title Priority Date Filing Date
FR991650D Expired FR991650A (fr) 1944-04-21 1944-04-21 Microphones différentiels
FR56404D Expired FR56404E (fr) 1944-04-21 1945-03-09 Microphones différentiels

Country Status (1)

Country Link
FR (3) FR991650A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1111670B (de) * 1959-06-06 1961-07-27 Akad Wissenschaften Ddr Stoerschallunempfindliches Mikrofon
US4319096A (en) * 1980-03-13 1982-03-09 Winey James M Line radiator ribbon loudspeaker

Also Published As

Publication number Publication date
FR56404E (fr) 1952-09-24
FR991650A (fr) 1951-10-08

Similar Documents

Publication Publication Date Title
FR907783A (fr) Roule-bobine
FR902023A (fr) Hydrocycle
FR988897A (fr) Capsule microphonique
FR56404E (fr) Microphones différentiels
FR939127A (fr) Microphones
FR994075A (fr) Microphone
FR1000589A (fr) Mortaiseuse
FR906084A (fr) Meuble-lit-bibliothèque
FI22369A (fi) Dörr-dörrkarm-aggregat
FR992956A (fr) Microphone
FR937944A (fr) Amplificateur
FI23926A (fi) Gallerjärnkonstruktion av armerad betong
FR909275A (fr) Différentiel hydraulique
FR951855A (fr) Baratte-malaxeur
FR906775A (fr) Affûteur-aiguiseur-ponceur
FR988895A (fr) Gyropendule
FR992287A (fr) Serrure-verrou
FR1000561A (fr) Mortaiseuse
FR910874A (fr) Turbomoteur
ES9874Y (es) Caja-envase
FI22849A (fi) Multausaura
FI24000A (fi) Elektrisk urladdningsrör
FI22300A (fi) Lufttätt tillslutet kärl
FI22552A (fi) Fiskbehandlingsmaskin
FI20421A (fi) Tallrikformig laudmina