FR779002A - Microphone perfectionné, notamment pour appareils avertisseurs à amplificateur de son - Google Patents

Microphone perfectionné, notamment pour appareils avertisseurs à amplificateur de son

Info

Publication number
FR779002A
FR779002A FR779002DA FR779002A FR 779002 A FR779002 A FR 779002A FR 779002D A FR779002D A FR 779002DA FR 779002 A FR779002 A FR 779002A
Authority
FR
France
Prior art keywords
signal amplifiers
microphone
advanced
advanced microphone
amplifiers
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)
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.)
SANOR
Original Assignee
SANOR
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 SANOR filed Critical SANOR
Application granted granted Critical
Publication of FR779002A publication Critical patent/FR779002A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B1/00—Systems for signalling characterised solely by the form of transmission of the signal
    • G08B1/08—Systems for signalling characterised solely by the form of transmission of the signal using electric transmission ; transformation of alarm signals to electrical signals from a different medium, e.g. transmission of an electric alarm signal upon detection of an audible alarm signal

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR779002D 1933-12-15 1933-12-15 Microphone perfectionné, notamment pour appareils avertisseurs à amplificateur de son Expired FR779002A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR779002T 1933-12-15

Publications (1)

Publication Number Publication Date
FR779002A true FR779002A (fr) 1935-03-28

Family

ID=9202492

Family Applications (1)

Application Number Title Priority Date Filing Date
FR779002D Expired FR779002A (fr) 1933-12-15 1933-12-15 Microphone perfectionné, notamment pour appareils avertisseurs à amplificateur de son

Country Status (1)

Country Link
FR (1) FR779002A (fr)

Similar Documents

Publication Publication Date Title
FR800970A (fr) Amplificateurs pour courants de signalisation
CH207880A (de) Schallwiedergabeanordnung.
CH205239A (de) Schallaufnahmevorrichtung.
FR779002A (fr) Microphone perfectionné, notamment pour appareils avertisseurs à amplificateur de son
FR43928E (fr) Perfectionnements aux haut-parleurs
FR814859A (fr) Installation pour la reproduction des sons
FR823417A (fr) Perfectionnements aux hauts-parleurs
DK51523C (da) Højttaler.
FR768463A (fr) Perfectionnements aux haut-parleurs
FR802837A (fr) Perfectionnements aux haut-parleurs
FR751401A (fr) Amplificateur de sons perfectionné
FR715456A (fr) Reproducteur de sons perfectionné
CA330539A (fr) Systeme amplificateur des sons
FR786228A (fr) Système de reproduction sonore
DK48485C (da) Anordning ved Højttalere.
DK58224C (da) Højttaleranlæg med Lydføringer.
FR769089A (fr) Amplificateur de son
DK52905C (da) Signalsystem.
FR754819A (fr) Système magnétique particulièrement pour haut-parleurs
DK49935C (da) Elektrisk Membranlydgiversystem.
DK52148C (da) Dynamisk Højttaler.
FR777264A (fr) Perfectionnements aux haut-parleurs
FR791014A (fr) éliminateur de bruissement pour appareils électro-acoustiques
DK56184C (da) Akustisk Signalapparat.
FR777636A (fr) Enregistrement de sons