FR519035A - Microphone - Google Patents

Microphone

Info

Publication number
FR519035A
FR519035A FR519035A FR519035DA FR519035A FR 519035 A FR519035 A FR 519035A FR 519035 A FR519035 A FR 519035A FR 519035D A FR519035D A FR 519035DA FR 519035 A FR519035 A FR 519035A
Authority
FR
France
Prior art keywords
microphone
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
FR519035A
Other languages
English (en)
Inventor
Eric Magnus Campbel Tigerstedt
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.)
ERIC MAGNUS CAMPBELL TIGERSTED
Original Assignee
ERIC MAGNUS CAMPBELL TIGERSTED
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 ERIC MAGNUS CAMPBELL TIGERSTED filed Critical ERIC MAGNUS CAMPBELL TIGERSTED
Application granted granted Critical
Publication of FR519035A publication Critical patent/FR519035A/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/026—Microphones in which the sound is perpendicular to the current crossing the transducer material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR519035A 1918-11-08 1920-07-05 Microphone Expired FR519035A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK519035X 1918-11-08

Publications (1)

Publication Number Publication Date
FR519035A true FR519035A (fr) 1921-06-03

Family

ID=8151257

Family Applications (1)

Application Number Title Priority Date Filing Date
FR519035A Expired FR519035A (fr) 1918-11-08 1920-07-05 Microphone

Country Status (1)

Country Link
FR (1) FR519035A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE863083C (de) * 1941-09-12 1953-01-15 Siemens Ag Kohlemikrophon
DE757629C (de) * 1938-09-09 1953-01-19 Lorenz C Ag Querstrommikrofon

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE757629C (de) * 1938-09-09 1953-01-19 Lorenz C Ag Querstrommikrofon
DE863083C (de) * 1941-09-12 1953-01-15 Siemens Ag Kohlemikrophon

Similar Documents

Publication Publication Date Title
FR497013A (fr) Béquille-siège
FR519035A (fr) Microphone
FR20519E (fr) Valise-table-tabourets
FR502204A (fr) Mélangeur-pétrisseur
DK26572C (da) Mikrofon.
FR491203A (fr) Raidisseur-accrocheur
FR21124E (fr) Hourdis
FR490019A (fr) Ellipsographe
FR489606A (fr) Poele-calorifère
FR506156A (fr) Optophone
FR492528A (fr) Écosseuse-concasseuse
FR24160E (fr) Interrupteur-commutateur
FR494901A (fr) Aéro-uréthroscopes
FR494233A (fr) Ellipsographe
FR493978A (fr) Discobole
FR493025A (fr) Bérot
FR489325A (fr) Fumivore
FR491419A (fr) Cantine-lit
FI7047A (fi) Pannstenshacka
FI7141A (fi) Kullager
FI6990A (fi) Paketeringsmaskin
FI7004A (fi) Mjölkningsapparat
FI7018A (fi) Geyserradiator
FI7035A (fi) Skobrodd
FI6975A (fi) Tvillingsförgasare