Abstract: A signal processing method transforms X input signals into M output signals. The method includes applying a decorrelation filter to the X input signals so as to generate N decorrelated signals ei; and for each decorrelated signal ei determined, generating N delayed signals ei,k by applying a delay ?k and a gain gk to each decorrelated signal ei, the delays ?k and the gains gk being chosen. For each decorrelated signal ei, the delayed signals ei,k simulate a propagation of the decorrelated signal in a virtual space. The virtual space has N virtual loudspeakers and a virtual listening position that are distributed according to a predetermined geometry. For each value of k, summing the delayed signals ei,k: Ek=?i=1Nei,k; and determining M output signals, each output signal resulting from a linear combination of the N sums of the delayed signals Ek.

Abstract: An acoustic system (1) for diffusing sound from N channels (Si) comprising audio frequencies, N being greater than or equal to two, the acoustic system comprising a frame (5), M loudspeakers (HPj) which are similar to each other and mounted on the frame (5), and a processing unit (20) designed to send M loudspeaker signals (SSj) to the loudspeakers respectively. The loudspeakers are arranged at an angle about an axis (Z), two successive loudspeakers forming an angle (a) substantially equal to 360° divided by M.

Abstract: An acoustic system (1) for diffusing sound from N channels (Si) comprising audio frequencies, N being greater than or equal to two, the acoustic system comprising a frame (5), M loudspeakers (HPj) which are similar to each other and mounted on the frame (5), and a processing unit (20) designed to send M loudspeaker signals (SSj) to the loudspeakers respectively. The loudspeakers are arranged at an angle about an axis (Z), two successive loudspeakers forming an angle (a) substantially equal to 360° divided by M.

Abstract: Loudspeaker enclosure comprising at least one loudspeaker having a convex mobile membrane, and a member surrounding the mobile membrane and comprising an external surface bounded by an internal edge (??) situated facing the mobile membrane, which comprises a peripheral edge (?) situated facing the internal edge of the member and forming a closed loop. The mobile membrane and the member have a suitable shape such that, over a continuous portion (??) of the peripheral edge (?) representing at least 25% of the length of the peripheral edge, for any first point (M) on the continuous portion and any second point (M?) situated on the internal edge at a location such that the distance between the first point (M) and second point (M?) is minimal, the mobile membrane has, at the first point, a first tangent plane, essentially coincident with a second tangent plane at the second point.

Abstract: This electroacoustic conversion chain comprising at least one loudspeaker, this loudspeaker comprising means for generating a magnetic field in a magnetic circuit having an air gap and a membrane secured to turns of a conducting material which may move in this air gap, is characterized in that it comprises at least one control module comprising at least one input for conveying a signal to be broadcast and at least one output connected to a turn, the control module being able to apply to said or each output an excitation signal depending on the position of at least one turn relatively to the air gap.

Abstract: An electrodynamic loudspeaker (10) including: a chassis (15), at least one magnetic circuit (20) secured to the chassis, at least one movable assembly (30) with respect to the chassis, the assembly (30) including a convex diaphragm (53) turned towards the outside of the loudspeaker, and at least one energizing coil (57) defining an axis (D) of the loudspeaker, a first suspension joint (35) connecting the assembly and the chassis, and a second suspension joint (40) of the assembly, the second joint being axially further away from the diaphragm than the first joint. The assembly further comprises at least one connecting member (59) secured to the diaphragm, the second joint including a radially inner attachment point (81) attached on the connecting member, and a radially outer attachment point (83) attached on the chassis.

Abstract: The present invention relates to a device for controlling a loudspeaker (14) in an enclosure, comprising: an input for an audio signal (Saudio_ref) to be reproduced; an output for supplying an excitation signal from the loudspeaker. It comprises a control unit comprising: means (24, 25) for calculating a desired dynamic value (Aref) of the loudspeaker diaphragm based on the audio signal (Saudio_ref) to be reproduced and the structure of the enclosure; means (26) for calculating a plurality of desired dynamic values (Aref, dAref/dt, Vref, Xref) of the loudspeaker diaphragm at each moment based on only the desired dynamic value (Aref); a mechanical model (36) of the loudspeaker; and means (70, 80, 90) for calculating the excitation signal of the loudspeaker at each moment, without feedback loop, from the mechanical model (36) of the loudspeaker and desired dynamic values (Aref, dAref/dt, Vref, Xref).

Abstract: The present invention relates to a device for controlling a loudspeaker (14) in an enclosure, comprising: an input for an audio signal (Saudio_ref) to be reproduced; an output for supplying an excitation signal from the loudspeaker; means (26, 36, 38, 70, 80, 90) for calculating the excitation signal of the loudspeaker (14) at each moment based on the audio signal (Saudio_ref).

Abstract: An electrodynamic loudspeaker (10) including: a chassis (15), at least one magnetic circuit (20) secured to the chassis, at least one movable assembly (30) with respect to the chassis, the assembly (30) including a convex diaphragm (53) turned towards the outside of the loudspeaker, and at least one energizing coil (57) defining an axis (D) of the loudspeaker, a first suspension joint (35) connecting the assembly and the chassis, and a second suspension joint (40) of the assembly, the second joint being axially further away from the diaphragm than the first joint. The assembly further comprises at least one connecting member (59) secured to the diaphragm, the second joint including a radially inner attachment point (81) attached on the connecting member, and a radially outer attachment point (83) attached on the chassis.

Abstract: The present invention relates to a device for controlling a loudspeaker (14) in an enclosure, comprising: an input for an audio signal (Saudio_ref) to be reproduced; an output for supplying an excitation signal from the loudspeaker. It comprises a control unit comprising: means (24, 25) for calculating a desired dynamic value (Aref) of the loudspeaker diaphragm based on the audio signal (Saudio_ref) to be reproduced and the structure of the enclosure; means (26) for calculating a plurality of desired dynamic values (Aref, dAref/dt, Vref, Xref) of the loudspeaker diaphragm at each moment based on only the desired dynamic value (Aref); a mechanical model (36) of the loudspeaker; and means (70, 80, 90) for calculating the excitation signal of the loudspeaker at each moment, without feedback loop, from the mechanical model (36) of the loudspeaker and desired dynamic values (Aref, dAref/dt, Vref, Xref).

Abstract: The present invention relates to a device for controlling a loudspeaker (14) in an enclosure, comprising: an input for an audio signal (Saudio_ref) to be reproduced; an output for supplying an excitation signal from the loudspeaker; means (26, 36, 38, 70, 80, 90) for calculating the excitation signal of the loudspeaker (14) at each moment based on the audio signal (Saudio_ref).

Abstract: Loudspeaker enclosure comprising at least one loudspeaker having a convex mobile membrane, and a member surrounding the mobile membrane and comprising an external surface bounded by an internal edge (??)situated facing the mobile membrane, which comprises a peripheral edge (?) situated facing the internal edge of the member and forming a closed loop. The mobile membrane and the member have a suitable shape such that, over a continuous portion (??) of the peripheral edge (?) representing at least 25% of the length of the peripheral edge, for any first point (M) on the continuous portion and any second point (M?) situated on the internal edge at a location such that the distance between the first point (M) and second point (M?) is minimal, the mobile membrane has, at the first point, a first tangent plane, essentially coincident with a second tangent plane at the second point.

Abstract: A piece of sound reproduction equipment includes an input receiving an audio input signal to be reproduced; a loudspeaker with a resistance of less than 1?; a processing and amplification chain including: an amplifier able to energize the loudspeaker, a stage correcting the audio signal, positioned between the input and the amplifier, said correction stage is able to simulate virtual physical parameters of the loudspeaker by modifying the characteristics of the audio signal provided to the amplifier. The correction stage is able to modify the virtual physical parameters over time during operation of the sound reproduction system.

Abstract: This electroacoustic conversion chain comprising at least one loudspeaker, this loudspeaker comprising means for generating a magnetic field in a magnetic circuit having an air gap and a membrane secured to turns of a conducting material which may move in this air gap, is characterized in that it comprises at least one control module comprising at least one input for conveying a signal to be broadcast and at least one output connected to a turn, the control module being able to apply to said or each output an excitation signal depending on the position of at least one turn relatively to the air gap.