OMNIDIRECTIONAL SPHERICAL MEMBRANE SPEAKER USING A MAGNETOSTRICTIVE RIBBON

摘要

The invention relates to an omnidirectional loudspeaker. This loudspeaker comprises a spherical membrane which comprises turns formed of a ribbon 2 of a magnetostrictive material spirally wound in a sphere; these turns are held by an elastic support 1, so that they form with the support, a spherical membrane. The ribbon has two opposite faces 11, 12, one of which is directed towards the inside I of the sphere and the other towards the outside E, and two ends 3, 4 situated in two diametrically opposite zones of the sphere, for be connected to an electrical control means 5 providing a signal corresponding to sound waves to be reproduced, and means 7 for continuous polarization of the membrane. According to the invention, one of the faces 11 of the ribbon 2 is at least partially covered with a thin layer 13 of a rigid material. / P P Application to the diffusion of high quality omnidirectional sound waves . / P