H - Electricity
04
R
H04R 9/04 (2006.01) H04R 7/02 (2006.01)
Patent
CA 2173466
In quality loudspeakers there are certain distortion problems owing to a lack of damping of the movements of the outer, free edge of the loudspeaker diaphragm. In connection with the invention it has been recognized that these problems are widely due to some special interference phenomena originating from the total movement of the diaphragm, and according to the invention it has been found advantageous to provide, in the area of the outer edge of the diaphragm, a differentiation with respect to the effective spring characteristic of the edge suspension of the diaphragm. This is achievable in a variety of manners, e.g. already by a cutting off of pieces of the exterior diaphragm zone as secured to the edge suspension.
Certains haut-parleurs de qualité présentent des distorsions dues à l'absence d'amortissement des mouvements du bord extérieur libre de la membrane (2). Il a été constaté en relation avec la présente invention que ces problèmes étaient largement dus à certains phénomènes particuliers d'interférences dus au mouvement global de la membrane d'où l'objet de cette invention qui est de prévoir dans la zone du bord extérieur de la membrane une différentiation des caractéristiques effectives d'élasticité de la suspension du bord de la membrane (8). Cela s'obtient de plusieurs manières notamment en découpant certaines parties de la périphérie de la membrane restant fixées à la suspension du bord (8, 14).
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Tymphany Hk Limited
Vifa-Speak A/s
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