FR473933A - Sound amplifier for sirens - Google Patents

Sound amplifier for sirens

Info

Publication number
FR473933A
FR473933A FR473933DA FR473933A FR 473933 A FR473933 A FR 473933A FR 473933D A FR473933D A FR 473933DA FR 473933 A FR473933 A FR 473933A
Authority
FR
France
Prior art keywords
sirens
sound amplifier
amplifier
sound
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
Louis Chollet
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR473933A publication Critical patent/FR473933A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K7/00—Sirens

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR473933D 1913-10-23 1913-10-23 Sound amplifier for sirens Expired FR473933A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR473933T 1913-10-23

Publications (1)

Publication Number Publication Date
FR473933A true FR473933A (en) 1915-02-02

Family

ID=1511949

Family Applications (1)

Application Number Title Priority Date Filing Date
FR473933D Expired FR473933A (en) 1913-10-23 1913-10-23 Sound amplifier for sirens

Country Status (1)

Country Link
FR (1) FR473933A (en)

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