Abstract: Disclosed is a sound transducer, which can be assembled, integrated or installed primarily in the consumer, pro audio, installation and automotive sectors on land, water and air with minimal space requirements, use of materials and weight. The transducer includes a ring sound wave shaper having a very flat, thin multi-layered, flexible membrane, which generates point-shaped or ring-shaped sound within the membrane diameter.

Abstract: An electrodynamic sound transducer having a transducer basket, a flexible membrane and a magnetic system having an air gap, a voice coil on a cylindrical coil carrier and a dampening central element, which is connected to the membrane, includes a coil carrier of the voice coil is connected to the membrane by a mounting adapter. The membrane is configured as a three-dimensional free-form surface except for conical shapes.

Abstract: Disclosed is a sound transducer, which can be assembled, integrated or installed primarily in the consumer, pro audio, installation and automotive sectors on land, water and air with minimal space requirements, use of materials and weight. The transducer includes a ring sound wave shaper having a very flat, thin multi-layered, flexible membrane, which generates point-shaped or ring-shaped sound within the membrane diameter.

Abstract: The invention relates to a magnet system with at least one permanent magnet unit, in particular for use in a loudspeaker, wherein the permanent magnet unit consists of an interconnected combination of at least a first permanent magnet (5) having a first magnetic remanence and a second permanent magnet (4) having a second magnetic remanence, the second magnetic remanence being substantially higher, preferably at least twice as high as the first magnetic remanence.

Abstract: A speaker includes a basket, a membrane system with a sandwich-like membrane that becomes thicker from the outside inwards, an oscillation coil mounted in the center and at the level of the membrane on a support. A first centering centers the membrane in the basket in a first plane, and a second centering connected with the support centers the membrane in a second plane via the support. A symmetrically designed stray field magnet system with two magnets with opposingly-oriented poles and a pole plate are centrally placed between the magnets. The stray field magnet system centrally penetrates the membrane, the oscillation coil is at the level of the pole plate in its non-deployed state, and the stray field magnet system is situated in centered fashion to the basket. A centered lip forms a closed and flexible connection between the stray field magnet system and the membrane system.

Abstract: A loudspeaker designed with a large area having sandwich-like layer structure includes a plurality of conductive and nonconductive layers which form an active sound-radiating loudspeaker surface. The plurality of conductive and nonconductive layers include a first diaphragm sheet coated with an electrically conductive layer, a second diaphragm sheet coated with an electrically conductive layer, a static high-voltage supply, which generates an electric field between the first electrically conductive layer and the second electrically conductive layer, and an audio source which influences the high-voltage fields between the first electrically conductive layer and the second electrically conductive layer via a capacitor. The invention is distinguished in that, with the second electrically conductively coated diaphragm sheet, the first electrically conductively coated diaphragm sheet forms a sandwich which extends simply over the active loudspeaker surface, around a first elastic and nonconductive interlayer.

Abstract: The invention relates to a composition of a speaker membrane, consisting at minimum of the following layering sequence: a first cover layer (3) made of a plastic, a first adhesive layer (2), and a first layer (4) manufactured from a non-woven material (fleece) made of fibers.

Abstract: The invention relates to a speaker with a sound radiation direction, comprising: a basket (6), a membrane system with a sandwich-like membrane (1) that becomes thicker from the outside inwards, an oscillation coil (16) that is mounted in the center and at the level of the membrane (1) on a support (3), and wound inwards, with the membrane (1) being connected with the support (3), a first centering (2), especially one with a sinusoid shape in cross section, which centers the membrane (1) in the basket (6) in a first plane, and a second centering (4), especially one with a sinusoid shape in cross section, which is connected with the support (3) of the oscillation coil (16) and centers the membrane in a second plane via the support (3), a symmetrically designed stray field magnet system (7) with two magnets (9) with opposingly-oriented poles and a pole plate (8) centrally placed between the two magnets, wherein the stray field magnet system (7) centrally penetrates the membrane (1), the oscillation coil (16)

Abstract: The invention relates to a composition of a speaker membrane, consisting at minimum of the following layering sequence: a first cover layer (3) made of a plastic, a first adhesive layer (2), and a first layer (4) manufactured from a non-woven material (fleece) made of fibers.

Abstract: The invention relates to a loudspeaker designed with a large area having sandwich-like layer structure, consisting of a plurality of conductive and nonconductive layers which form an active sound-radiating loudspeaker surface, having: a first diaphragm sheet (1) coated with an electrically conductive layer (3), a second diaphragm sheet (2) coated with an electrically conductive layer (4) a static high-voltage supply (9), which generates an electric field between the first electrically conductive layer (3) and the second electrically conductive layer (4), an audio source (10) which influences the high-voltage fields between the first electrically conductive layer (3) and the second electrically conductive layer (4) via a capacitor (15).

Abstract: The invention relates to a loudspeaker comprising at least one magnet (5), a membrane (2) with an outer edge (32) defining an outer edge plane (30) of the membrane, a bead (3) surrounding the membrane (2), a moving coil (9) which is fixed to the first membrane (2), and a magnet system (4) comprising at least one magnet (9). The loudspeaker also has a supporting structure (1) for receiving the magnet system (4) and the membrane, the membrane being connected to the supporting structure by means of the bead, and the supporting structure has a front side which is oriented towards the membrane and a rear side which is oriented in the opposite direction. The membrane (2) is at least partially convex towards the front, in the predominant acoustic direction (33), and the region (28) of the membrane (2), to which the moving coil is fixed, is arranged in front of the outer edge plane (30) of the membrane.

Abstract: The invention relates to a loudspeaker comprising at least one magnet (5), a membrane (2) with an outer edge (32) defining an outer edge plane (30) of the membrane, a bead (3) surrounding the membrane (2), a moving coil (9) which is fixed to the first membrane (2), and a magnet system (4) comprising at least one magnet (9). Said loudspeaker also has a supporting structure (1) for receiving the magnet system (4) and the membrane, the membrane being connected to the supporting structure by means of the bead, and the supporting structure has a front side which is oriented towards the membrane and a rear side which is oriented in the opposite direction. Said membrane (2) is at least partially convex towards the front, in the predominant acoustic direction (33), and the region (28) of the membrane (2), to which the moving coil is fixed, is arranged in front of the outer edge plane (30) of the membrane.

Abstract: A loudspeaker diaphragm for converting fluctuating electric energy into acoustic energy is made of a composite of paper, fiber material, plastic, laminate, metal foil, or a combination of the afore-mentioned materials, and elastic plastic foam he composite may hereby be constructed of two or more layers depending on the requirement to be satisfied by the loudspeaker diaphragm.