FR403764A - Dispositif applicable aux microphones - Google Patents

Dispositif applicable aux microphones

Info

Publication number
FR403764A
FR403764A FR403764A FR403764DA FR403764A FR 403764 A FR403764 A FR 403764A FR 403764 A FR403764 A FR 403764A FR 403764D A FR403764D A FR 403764DA FR 403764 A FR403764 A FR 403764A
Authority
FR
France
Prior art keywords
microphones
device applicable
applicable
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
FR403764A
Other languages
English (en)
Inventor
Carl Emil Egner
Johann Gunnar Holmstroem
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.)
JOHANN GUNNAR HOLMSTROEM
Original Assignee
JOHANN GUNNAR HOLMSTROEM
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 JOHANN GUNNAR HOLMSTROEM filed Critical JOHANN GUNNAR HOLMSTROEM
Application granted granted Critical
Publication of FR403764A publication Critical patent/FR403764A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR403764A 1908-09-05 1909-06-07 Dispositif applicable aux microphones Expired FR403764A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE403764X 1908-09-05

Publications (1)

Publication Number Publication Date
FR403764A true FR403764A (fr) 1909-11-13

Family

ID=1448384

Family Applications (1)

Application Number Title Priority Date Filing Date
FR403764A Expired FR403764A (fr) 1908-09-05 1909-06-07 Dispositif applicable aux microphones

Country Status (1)

Country Link
FR (1) FR403764A (fr)

Similar Documents

Publication Publication Date Title
FR403764A (fr) Dispositif applicable aux microphones
CH42888A (de) Vormaischapparat
CH41618A (de) Orientierungsvorrichtung
FR394356A (fr) Perfectionnements aux registres
FR395363A (fr) Perfectionnements aux fixe-cravates
FR391801A (fr) Perfectionnements apportés aux perforatrices
FR395756A (fr) Perfectionnements aux appareils d'aviation
FR392765A (fr) Perfectionnements aux appareils de sondage
FR394165A (fr) Perfectionnements aux appareils de sauvetage maritimes
FR395840A (fr) Perfectionnements aux aéroplanes
FR442658A (fr) Dispositif applicable aux microphones
FR395069A (fr) Perfectionnements apportés aux accouplements
FR395928A (fr) Perfectionnements aux appareils filtrants
FR397433A (fr) Perfectionnements aux phonographes
FR392599A (fr) Perfectionnements apportés aux tarares
FR388174A (fr) Perfectionnements apportés aux transmetteurs téléphoniques
FR390699A (fr) Perfectionnements apportés aux taximètres
FR386217A (fr) Perfectionnements apportés aux taximètres
FR394910A (fr) Dispositif de conversation applicable aux appareils de sauvetage
FR11932E (fr) Perfectionnements aux registres
FR399507A (fr) Perfectionnements aux appareils télégraphiques
FR399388A (fr) Perfectionnements aux gazogènes
FR403397A (fr) Perfectionnements aux gazogènes
FR359510A (fr) Dispositif applicable aux ébullioscopes
FR396475A (fr) Microphone perfectionné