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FR912121A - Further training in sound receiver and amplifier devices, in particular for motor vehicles - Google Patents

Further training in sound receiver and amplifier devices, in particular for motor vehicles

Info

Publication number
FR912121A
FR912121A FR912121DA FR912121A FR 912121 A FR912121 A FR 912121A FR 912121D A FR912121D A FR 912121DA FR 912121 A FR912121 A FR 912121A
Authority
FR
France
Prior art keywords
motor vehicles
further training
sound receiver
amplifier devices
amplifier
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
French (fr)
Inventor
Pierre-Raoul-Joseph Stehle
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 FR912121A publication Critical patent/FR912121A/en
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
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/342—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for microphones

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR912121D 1945-01-29 1945-01-29 Further training in sound receiver and amplifier devices, in particular for motor vehicles Expired FR912121A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR912121T 1945-01-29

Publications (1)

Publication Number Publication Date
FR912121A true FR912121A (en) 1946-07-31

Family

ID=9421080

Family Applications (1)

Application Number Title Priority Date Filing Date
FR912121D Expired FR912121A (en) 1945-01-29 1945-01-29 Further training in sound receiver and amplifier devices, in particular for motor vehicles

Country Status (1)

Country Link
FR (1) FR912121A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE921618C (en) * 1951-01-11 1954-12-23 Physikalisch Tech Werkstaetten Overhaul signal receiving system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE921618C (en) * 1951-01-11 1954-12-23 Physikalisch Tech Werkstaetten Overhaul signal receiving system

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