FR831818A - Utilisation d'un microphone électro-magnétique avec des masques - Google Patents

Utilisation d'un microphone électro-magnétique avec des masques

Info

Publication number
FR831818A
FR831818A FR831818DA FR831818A FR 831818 A FR831818 A FR 831818A FR 831818D A FR831818D A FR 831818DA FR 831818 A FR831818 A FR 831818A
Authority
FR
France
Prior art keywords
masks
electro
magnetic microphone
microphone
magnetic
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
Ulmer
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 FR831818A publication Critical patent/FR831818A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces
FR831818D 1938-01-10 1938-01-10 Utilisation d'un microphone électro-magnétique avec des masques Expired FR831818A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR831818T 1938-01-10

Publications (1)

Publication Number Publication Date
FR831818A true FR831818A (fr) 1938-09-15

Family

ID=9294159

Family Applications (1)

Application Number Title Priority Date Filing Date
FR831818D Expired FR831818A (fr) 1938-01-10 1938-01-10 Utilisation d'un microphone électro-magnétique avec des masques

Country Status (1)

Country Link
FR (1) FR831818A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007006732A1 (de) * 2007-02-06 2008-08-21 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Atemschutzmaske mit Mikrofon

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007006732A1 (de) * 2007-02-06 2008-08-21 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Atemschutzmaske mit Mikrofon

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