FR984897A - Transducteurs acoustiques à granules - Google Patents

Transducteurs acoustiques à granules

Info

Publication number
FR984897A
FR984897A FR984897DA FR984897A FR 984897 A FR984897 A FR 984897A FR 984897D A FR984897D A FR 984897DA FR 984897 A FR984897 A FR 984897A
Authority
FR
France
Prior art keywords
transducers
pellet
acoustic
pellet transducers
acoustic pellet
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)
French (fr)
Inventor
Dennis Edward Skelton
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR984897A publication Critical patent/FR984897A/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; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/021—Microphones with granular resistance material
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR984897D 1948-04-23 1949-04-21 Transducteurs acoustiques à granules Expired FR984897A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB277063X 1948-04-23

Publications (1)

Publication Number Publication Date
FR984897A true FR984897A (fr) 1951-07-11

Family

ID=10263970

Family Applications (2)

Application Number Title Priority Date Filing Date
FR984897D Expired FR984897A (fr) 1948-04-23 1949-04-21 Transducteurs acoustiques à granules
FR63027D Expired FR63027E (fr) 1948-04-23 1951-10-10 Transducteurs acoustiques à granules

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR63027D Expired FR63027E (fr) 1948-04-23 1951-10-10 Transducteurs acoustiques à granules

Country Status (5)

Country Link
BE (1) BE488632A (de)
CH (1) CH277063A (de)
DE (1) DE873102C (de)
FR (2) FR984897A (de)
GB (1) GB670586A (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE952823C (de) * 1953-12-02 1956-11-22 Friedrich Reiner Befestigung von Kohleelektroden an Metall- oder Kunststoffmembranen fuer Kohlekoernermikrofone
DE1061825B (de) * 1954-02-26 1959-07-23 Hans Widmaier Kohlegriessmikrophon-Sprechkapsel
DE960998C (de) * 1954-02-26 1957-03-28 Standard Elek K Ag Kohlemikrofon mit beweglicher Tauchelektrode
DE1095318B (de) * 1955-03-18 1960-12-22 Standard Elektrik Lorenz Ag Kohlemikrofon mit beweglicher Tauchelektrode
DE1125485B (de) * 1959-03-25 1962-03-15 Siemens Ag Kohlemikrofon
DE1181745B (de) * 1962-09-15 1964-11-19 Telefonbau Widerstandsmikrofon, insbesondere Kohlemikrofon

Also Published As

Publication number Publication date
BE488632A (de)
CH277063A (de) 1951-08-15
GB670586A (en) 1952-04-23
FR63027E (fr) 1955-07-13
DE873102C (de) 1953-04-09

Similar Documents

Publication Publication Date Title
FR985740A (fr) Transducteur
FR985357A (fr) Haut-parleur
FR984897A (fr) Transducteurs acoustiques à granules
FR57926E (fr) Perfectionnements aux stylographes
CH268976A (de) Magnetostriktiver Schwinger.
FR997693A (fr) Transducteurs électro-acoustiques
FR969129A (fr) Collecteur-trieur de poussières
FR58275E (fr) Perfectionnements aux stylographes
AT172890B (de) Meßwertübertrager
FR1009248A (fr) Persiennage perfectionné
FR1006456A (fr) Reproducteur sonore électro-mécanique
FR1011173A (fr) Plastifiants
FR1010598A (fr) Perfectionnements aux rouches
FR1103407A (fr) Perfectionnements aux stylographes
FR983634A (fr) Perfectionnements relatifs à la synthèse de la bêta-ionylidène acétaldéhyde
DK75792C (da) Lydoptagelsesapparat.
FR969802A (fr) Pipe
FR979919A (fr) Haut-parleur double
FR1008623A (fr) Perfectionnements aux haut-parleurs
IE19510L (en) Electro-acoustic transducers
IE19431L (en) Electro-acoustic transducers
FR967972A (fr) Expanseur sonore
FI25123A (fi) Grammofon
FR1011097A (fr) Haut-parleur
FI24057A (fi) Elastiskt strumpskydd