Omnidirectional loudspeaker with spherical diaphragm using a two-layer magnetostrictive ribbon

摘要

the invention relates to an omnidirectional loudspeaker.;the loudspeaker includes a spherical membrane which comprises coils formed of a strip of magnetostrictive material (2) by a spiral coiled coil domain; these are maintained by a support elastic (1), so as to form with the support, and 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 to the outside ends (e), and (3)(4) located in two diametrically opposed areas of the sphere, to be connected to an electric control means (5) providing a signal corresponding to the sound waves to reproduce.and a means (7) for continuous polarization of the membrane. according to the invention, one of the faces (11) of the tape (2) is at least partly covered by a thin layer (13) of a rigid material.;application to the dissemination of high quality omni-directional sound waves.