Sound Solutions International Company, Ltd.

Knowles Ipc (M) Sdn. Bhd.

Ernst Tomas

Erich Klein

Gustav Otto

Andreas Hintennach

Manuel Mefleh

Stefan Gebhardt

Markus Trampert

Franz Heidinger

An electrodynamic actuator for a speaker or an electrodynamic acoustic transducer in general is disclosed, which comprises at least one voice coil, a magnet system and an arm arrangement of a plurality of arms connecting the at least one voice coil and the magnet system or at least a movable part thereof so that a relative movement between these parts is allowed. The arms are made of a metal core, which at least partly is coated with a coating structure having at least one coating metal layer consisting of a different material than the metal core.

Electromagnetic actuator for a speaker or a sound transducer with a multimetal layer connection between the voice coil and the magnet system

An electrodynamic actuator for a speaker or an electrodynamic acoustic transducer in general is disclosed, which comprises at least one voice coil, a magnet system and an arm arrangement of a plurality of arms connecting the at least one voice coil and the magnet system or at least a movable part thereof so that a relative movement between these parts is allowed. The arms are made of metal with a fatigue strength of at least 370 N/mmor an ultimate tensile strength of at least 1100 N/mm.

Electromagnetic actuator for a speaker or a sound transducer with a high-strength metal connection between the voice coil and the magnet system

A dynamic loudspeaker driver comprising a magnet-system; a membrane; the membrane being movably mounted with respect to the magnet-system; at least one voice coil attached to the membrane and operatively coupled with the magnet-system, wherein the voice coil comprises an upper edge facing the membrane and a lower edge being arranged opposite the upper edge of the voice coil; at least one voice coil extension element comprising an upper surface facing the membrane and a lower surface facing the upper edge of the voice coil, wherein the lower surface of the voice coil extension element is attached the upper edge of the voice coil while the upper surface of the voice coil extension element is attached to the membrane.

Coil extension element

A loudspeaker in which a magnetic particle filter is provided in the vicinity of a sound outlet port.

Growing community of inventors

Strasshof an der Nordbahn, Austria

Ernst Tomas