GB247902A - Improvements in or relating to sound reproducing apparatus - Google Patents

Improvements in or relating to sound reproducing apparatus

Info

Publication number
GB247902A
GB247902A GB12111/25A GB1211125A GB247902A GB 247902 A GB247902 A GB 247902A GB 12111/25 A GB12111/25 A GB 12111/25A GB 1211125 A GB1211125 A GB 1211125A GB 247902 A GB247902 A GB 247902A
Authority
GB
United Kingdom
Prior art keywords
relating
reproducing apparatus
sound reproducing
board
internationaler
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
GB12111/25A
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.)
IRA INTERNATIONALER RADIO VERT
Original Assignee
IRA INTERNATIONALER RADIO VERT
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 IRA INTERNATIONALER RADIO VERT filed Critical IRA INTERNATIONALER RADIO VERT
Publication of GB247902A publication Critical patent/GB247902A/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
    • G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Audible And Visible Signals (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Road Signs Or Road Markings (AREA)

Abstract

247,902. Ira Internationaler Radio- Vertrieb Ges., (Assignees of Wolff, K.). Feb. 23, 1925, [Convention date]. Sound magnifying and directing appliances.- A freely-oscillating body 3 which may be a hollow cone is rigidly attached to a sounding board 5 and is disposed in proximity to the diaphragm of a soundreproducing apparatus. The body 3 may be placed in or close to the neck 2 of the usual horn 1 which may have a front wall 6 forming with the board 5 a resonating chamber 7.
GB12111/25A 1925-02-23 1925-05-09 Improvements in or relating to sound reproducing apparatus Expired GB247902A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE247902X 1925-02-23

Publications (1)

Publication Number Publication Date
GB247902A true GB247902A (en) 1926-08-05

Family

ID=5935455

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12111/25A Expired GB247902A (en) 1925-02-23 1925-05-09 Improvements in or relating to sound reproducing apparatus

Country Status (1)

Country Link
GB (1) GB247902A (en)

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