Abstract: A loudspeaker including a chassis, a drive unit and a diaphragm. The drive unit has a stationary part secured to the chassis and a translatable part secured to the diaphragm. An outer edge of the diaphragm is suspended from the chassis by an edge suspension. The edge suspension has a plurality of straight portions, each straight portion having a respective first surface and a respective second surface which meet along an edge to provide a spring which permits the diaphragm to be moved relative to the chassis by the drive unit. The edge suspension has at least one corner portion, wherein the/each corner portion joins two of the straight portions together and includes at least one geometrical interruption formed therein.

Abstract: The present invention relates to a loudspeaker 1 including a cone 20 having a central aperture with a cone collar 28 upstanding from the perimeter of the central aperture 26 of the cone, a spider 30 having a central aperture 36, the spider having a collar 38 upstanding from the perimeter of the central aperture of the spider, and a voice coil former 40. The collar of each of the cone and the spider are concentrically located around an end region of the voice coil former to form an elongate neck region 12. The use of the elongate neck region allows for the cone, spider and voice coil former to be joined more easily therefore forming a more reliable and durable join.

Abstract: The present invention relates to a loudspeaker (1).

Abstract: The present invention relates to a loudspeaker (1).

Abstract: A magnetic motor system for driving a loudspeaker voice coil. The system has first and second parts that define a volume for receiving a voice coil. The first and second parts each have a respective permanent magnet with first and second sidewalls that extend in a direction away from the volume. The first sidewall slopes in a direction towards the second sidewall as the sidewalls extend away from the volume. The first and second parts further have respective guide members for channelling lines of magnetic flux in a return path between the permanent magnets.

Abstract: A magnetic motor system for driving a loudspeaker voice coil. The system has first and second parts that define a volume for receiving a voice coil. The first and second parts each have a respective permanent magnet with first and second sidewalls that extend in a direction away from the volume. The first sidewall slopes in a direction towards the second sidewall as the sidewalls extend away from the volume. The first and second parts further have respective guide members for channelling lines of magnetic flux in a return path between the permanent magnets.

Abstract: The present invention provides: a loudspeaker including a frame, a drive unit, and a membrane; the membrane having an inner edge, an outer edge which is suspended from the frame, and a membrane body which is between the inner and outer edges and extends around the drive unit; the drive unit having a stationary part secured to the frame and a translatable part secured to the inner edge of the membrane; the membrane body including a dished portion which, has a depth that increases from said inner and outer edges towards a base region of the dished portion located between said edges; wherein the loudspeaker includes a stiffening element which extends around the drive unit and stiffens the membrane body at the base region of the dished portion, so as to reinforce the membrane against deformation in the base region. By including the stiffening element, it has been found that the first break-up resonance of the membrane is shifted to a higher frequency and has reduced amplitude.

Abstract: A diaphragm for a loudspeaker including a plurality of masses, each mass being substantially the same radial distance from the centre of the diaphragm, the plurality of masses being divided into two arrays, each array including one or more individual masses, wherein, in use, at a selected frequency, the pair of arrays act to produce a dominant bending moment, and, the centre of the diaphragm lies substantially on the axis of the dominant bending moment, wherein, the dominant bending moment is the bending moment produced by the combination of masses which has the greatest magnitude, if they produce more than one bending moment.

Abstract: The present invention provides a method of controlling an acoustic transducer array to generate a directional sound profile, the method including the steps of: (i) controlling the transducer array to generate, on the basis of a first signal, a primary sound profile which, when represented in polar coordinates, has a primary lobe extending along a first axis and an auxiliary lobe, associated with the primary lobe, extending along a second axis which is respectively different to the first axis; and (ii) generating, on the basis of the first signal, a cancelling signal for controlling the transducer array to generate a cancelling sound profile which, when represented in polar coordinates, has a cancelling lobe extending along said second axis, which cancelling lobe is modified in phase to interfere destructively with said auxiliary lobe.

Abstract: The present invention provides: a loudspeaker including a frame, a drive unit, and a membrane; the membrane having an inner edge, an outer edge which is suspended from the frame, and a membrane body which is between the inner and outer edges and extends around the drive unit; the drive unit having a stationary part secured to the frame and a translatable part secured to the inner edge of the membrane; the membrane body including a dished portion which, has a depth that increases from said inner and outer edges towards a base region of the dished portion located between said edges; wherein the loudspeaker includes a stiffening element which extends around the drive unit and stiffens the membrane body at the base region of the dished portion, so as to reinforce the membrane against deformation in the base region. By including the stiffening element, it has been found that the first break-up resonance of the membrane is shifted to a higher frequency and has reduced amplitude.

Abstract: The invention describes a method for processing sound signals for a surround left channel (SL) and a surround right channel (SR). Thereby, a continually varying delay between the resulting signals of the surround right (SR) and surround left channels (SL) is generated. Furthermore the invention describes a delay management unit, a sound processing system, an acoustic system comprising such a sound processing system, a mixing unit for such an acoustic system and a studio system comprising such a sound processing system.

Abstract: An electrodynamic loudspeaker device comprising a chassis (1), a translatable body (3) and an actuator (11) arranged for moving the translatable body (3) with regard to the chassis (1). The translatable body (3) is provided with (1) a three-dimensional diaphragm body (5) having a contour (5c), a diaphragm base part (5b) and a diaphragm top part (5t) which is wider than said base part (5b), an axial axis (5a) extending from the one part to the other part and (2) a support body (7). The support body (7) has a bound support end portion (7b) fixed to the diaphragm base part (5b) and a free support end portion (7f) and extends substantially parallel to the axial axis (5a) and at least partly inside a space (9) enveloped by the contour (5c) of the diaphragm body (5). The actuator (11) comprises a stationary actuator part (11s) supported by the chassis (1) and a movable actuator part (11m) supported by the support body (7) and sited between both support end portions.

Abstract: A loudspeaker provided with a frame (101), a membrane (103) and a drive unit (105). The membrane has an outer circumferential edge (104a) suspended from the frame and an inner circumferential edge (104b). The drive unit has a stationary part (106a) secured to the frame and a translatable part (106b) provided with a coil support (108b) secured to the inner circumferential edge of the membrane. The membrane includes a membrane body (104) which, viewed in a circumferential direction, has a pattern of folds radially extending between the inner circumferential edge and the flat outer circumferential edge of the membrane. The folds have a depth (d), which increases from the edges (104a, 104b) towards an area (104A) situated between both edges. In this area, the folds are provided with faces (204C), to which a spider (111) of the loudspeaker is secured. This loudspeaker combines a small height with a large stroke of the membrane.

Abstract: A shallow loudspeaker provided with a chassis (2), a movable body (4), a resilient suspension for guiding the movable body with respect to the chassis along a translation axis (T), and an electric actuator (6) for driving the movable body along the translation axis. The movable body has a diaphragm structure comprising a central domeshaped diaphragm (8) and a cone-shaped diaphragm (10) concentrically arranged with respect to the dome-shaped diaphragm. The cone-shaped diaphragm has a back portion (10b) and a front portion (10f) which is wider than the back portion. Both diaphragms are attached to each other near the back portion of the cone-shaped diaphragm, the cone-shaped diaphragm enveloping the dome-shaped diaphragm.

Abstract: A loudspeaker (1) has a chassis (2). A movable cone body (3), a resilient suspension for guiding the movable cone body (3) with respect to the chassis (2) along a translation axis T, and an electric actuator (4) for driving the movable cone body (3) along the translation axis T, and a centering diaphragm (8). The centering diaphragm (8) and the movable cone body (3) are interconnected, at a distance D1 from the actuator support (7), by a bridging element (10), the bridging element (10) having a number of separate contact areas (10a) with the movable cone body (3) around the actuator support (7).

Abstract: A multiple loudspeaker deviceQ) comprising a frame (3) with a first loudspeaker (5) for reproducing sound in a higher frequency range and a second loudspeaker (7) for reproducing sound in a lower frequency range, the frequency ranges having a crossover frequency fc. The first loud-speaker has a first radiation surface (5a) of maximal 1000 m2 and the second loudspeaker has a second radiation surface (7a), a central area (5b) of the first radiation surface and a central area (7b) of the second radiation surface being situated at a vertical distance d from each other. In order to obtain sound of high quality the parameters fc and d have the following values: 750 Hz<fc<3000 Hz, d>2. ?Jfc, (?J?c is the wavelength of the reproduced sound at fc), and 750 mm<d<3000 mm.

Abstract: The movable structure of a loudspeaker is configured to include a bridging element that connects the base of a diaphragm to an electromagnetic actuator. The bridging element extends radially with respect to the translation axis of the actuator and secures the diaphragm at a radial distance from the actuator, thereby increasing the base part of the diaphragm. This increased base area allows the translatable part of the actuator to be shortened, thereby providing high-performance in structures of limited depth.

Abstract: A loudspeaker unit comprising a frame (1), an acoustic panel (3), an electric exciter (5) for exciting the acoustic panel, and a tuning element (7). The panel suspends from the frame and has two substantially parallel main sides. The exciter is disposed at a first main side (13a) and comprises a stationary part and a translatable part, the translatable part being secured to the acoustic panel, the panel producing acoustic radiation upon energization of the exciter. The tuning element is disposed at a second main side (14a) and extends opposite the electric exciter and is connected to the frame. In order to facilitate the manufacture of the unit, the tuning element is provided with a mounting element (7a) extending through a passage in the acoustic panel, the stationary part of the electric exciter being mounted on the mounting element.

Abstract: A loudspeaker includes a housing with front and rear sides, a diagram flexibly connected to the housing, and an actuator or displacing the diaphragm with respect to the housing along a translation axis. The housing extends around the translation axis and includes a conical forepart widening towards the forepart, a base part positioned at the rear side, and an intermediate housing part. The intermediate part extends between the forepart and the base part and includes transition areas connected to these parts. The transitions behave as hinges under the influence of an axial load above a certain value, whereby the intermediate housing portion turns towards the translation axis and the forepart turns towards the rear side under the influence of such a load.

Abstract: An electromagnetic driving unit includes a magnet part and a coil part that is translatable along a translation axis with respect to the magnet part. A diaphragm extends from the coil part in a substantially radial direction with respect to the translation axis of the coil part. The magnet part includes two permanent magnets and an intermediate magnetic pole element that is sandwiched between the permanent magnets when viewed along the translation axis of the coil part. In order to improve the efficiency of the driving unit, the permanent magnets and the intermediate magnetic pole element are sandwiched between two external magnetic pole elements, and all pole elements have pole faces that are magnetically directed towards the coil part.