FR645292A - Microphone - Google Patents

Microphone

Info

Publication number
FR645292A
FR645292A FR645292DA FR645292A FR 645292 A FR645292 A FR 645292A FR 645292D A FR645292D A FR 645292DA FR 645292 A FR645292 A FR 645292A
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
Other languages
English (en)
Inventor
Gerard-Simon Israel-Kraemer
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 FR645292A publication Critical patent/FR645292A/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
    • H04R21/023—Microphones with more than one granular chamber

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR645292D 1926-12-27 1927-11-23 Microphone Expired FR645292A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE645292X 1926-12-27

Publications (1)

Publication Number Publication Date
FR645292A true FR645292A (fr) 1928-10-23

Family

ID=6580694

Family Applications (1)

Application Number Title Priority Date Filing Date
FR645292D Expired FR645292A (fr) 1926-12-27 1927-11-23 Microphone

Country Status (1)

Country Link
FR (1) FR645292A (fr)

Similar Documents

Publication Publication Date Title
FR642963A (fr) Microtéléphone
FR623985A (fr) Scléromètre
FR645292A (fr) Microphone
FR658425A (fr) Microphone perfectionné
SU4487A1 (ru) Конденсаторный микрофон
FR632091A (fr) Haut-parleur perfectionné
DK43222C (da) Mikrofon.
FR624491A (fr) écouteur microphonique
DK41476C (da) Højttaler.
FR32002E (fr) Altigraphe
FR623482A (fr) Rainureuse
FR638194A (fr) Parallélographe
FI11113A (fi) Kopieringsapparat
FI11161A (fi) Cellulosakokare
FI11043A (fi) Knästrumpskyddare
FI11054A (fi) Järnvägsbuffert
FI11056A (fi) Elektriskt säkerhetsstycke
FI11067A (fi) Ångmätare
FI11084A (fi) Ihopsättbar kälke
FI11093A (fi) Stenklyvningsmaskin
FI11095A (fi) Inlindningsmaskin
FI11103A (fi) Dubbeldörr
FI11106A (fi) Oja-auran jalas
FI11108A (fi) Sädessorterare
FI11072A (fi) Trycksmörjapparat