Sound Solutions International Company, Ltd.

Murat Polat

Gustav Otto

Christian Lembacher

Andreas Hintennach

Manuel Mefleh

Armin Timmerer

Hüdaverdi Ergül

Patrick Gelbmann

An electrodynamic actuator () for a plate like structure () or membrane () is disclosed, which comprises a voice coil (), a magnet system () and a plurality of arms () coupling the voice coil () and the magnet system () in a movable manner. The arms () are made of a metal with a fatigue strength of at least 370 N/mmor an ultimate tensile strength of at least 1100 N/mm. Each of the arms () comprises at least two arm sections (s, s, s), which are arranged movable to each other, and which are connected to each other by means of a damping material () with a tensile storage modulus of 0.1-6000 MPa and a tensile loss factor of at least 0.1, each measured at room temperature of 20° C. Moreover the invention relates to speaker () and an electrodynamic transducer () with such an electrodynamic actuator () and a method of manufacturing an intermediate product for such an electrodynamic actuator ().

Electrodynamic actuator for a speaker or a sound transducer with improved damping

A method of thinning a multilayer laminate material used for a membrane stiffening plate is provided to obtain a membrane stiffening plate having a thickness less than currently known in the art. The method provides for a significant reduction in the thickness of a membrane stiffening plate and provides for a mechanism to tune the cut-off frequency of a loudspeaker on which the membrane stiffening plate is used.

Stiffening plate for acoustic membrane and method of manufacturing same

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Vienna, Austria

Murat Polat