EP 0313560 B1 19911227 - MEMBRANE SYSTEM WITH FLEXION-RESISTANT ROTATIONALLY SYMMETRIC PLATE FOR USE AS A SOUND REFLECTING OR RECEIVING ELEMENT
Title (en)
MEMBRANE SYSTEM WITH FLEXION-RESISTANT ROTATIONALLY SYMMETRIC PLATE FOR USE AS A SOUND REFLECTING OR RECEIVING ELEMENT
Publication
Application
Priority
- DE 3622526 A 19860704
- DE 3718824 A 19870605
- DE 8617947 U 19860704
- DE 8617965 U 19860704
Abstract (en)
[origin: WO8800423A1] Membrane system with flexion resistant rotationally symmetric plate for use as a sound reflecting or receiving element for an acoustic transducer and applications of the membrane system. The task is to avoid essentially acoustic distorsion. The wall thickness (K) measured in an axial direction (1) along the plate should increase with raising values of a radial coordinate oriented towards the edge (r = RO), first up to beyond the half (RO/2) plate radius then decrease again, whereby the shape of the raising and falling curve of the wall thickness (K) along the radial coordinate (R) is constant up to a fixing area on the edge (R = RO) or tends to approximate to a constant progression. This membrane system can be used for all types of loud-speakers, and particularly also for compression chamber system.
IPC 1-7
IPC 8 full level
H04R 9/02 (2006.01); H04R 7/06 (2006.01); H04R 7/12 (2006.01)
CPC (source: EP)
H04R 7/122 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
WO 8800423 A1 19880114; DE 3775563 D1 19920206; DK 113988 A 19880303; DK 113988 D0 19880303; EP 0313560 A1 19890503; EP 0313560 B1 19911227; JP H01503189 A 19891026
DOCDB simple family (application)
DE 8700275 W 19870619; DE 3775563 T 19870619; DK 113988 A 19880303; EP 87903856 A 19870619; JP 50370387 A 19870619