FR340133A - Moyens d'augmenter l'intensité du son des machines parlantes - Google Patents

Moyens d'augmenter l'intensité du son des machines parlantes

Info

Publication number
FR340133A
FR340133A FR340133DA FR340133A FR 340133 A FR340133 A FR 340133A FR 340133D A FR340133D A FR 340133DA FR 340133 A FR340133 A FR 340133A
Authority
FR
France
Prior art keywords
ways
increase
sound intensity
talking machines
talking
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
Andre Letrange
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.)
ANDRE LETRANGE
Original Assignee
ANDRE LETRANGE
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 ANDRE LETRANGE filed Critical ANDRE LETRANGE
Application granted granted Critical
Publication of FR340133A publication Critical patent/FR340133A/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR340133D 1904-02-02 1904-02-02 Moyens d'augmenter l'intensité du son des machines parlantes Expired FR340133A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR340133T 1904-02-02

Publications (1)

Publication Number Publication Date
FR340133A true FR340133A (fr) 1904-06-27

Family

ID=1389266

Family Applications (1)

Application Number Title Priority Date Filing Date
FR340133D Expired FR340133A (fr) 1904-02-02 1904-02-02 Moyens d'augmenter l'intensité du son des machines parlantes

Country Status (1)

Country Link
FR (1) FR340133A (fr)

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