Abstract: An acoustic enclosure (1), comprising: a non-heat-conducting external wall (20) at least partially defining a casing (25), at least one electrodynamic loudspeaker (5) including a motor (48), the loudspeaker having a peripheral portion (50) fastened on the external wall, and at least one electronic control circuit (10) of the loudspeaker. The motor and the electronic circuit are connected to a same member (15) of the acoustic enclosure. The member conducts heat and includes an exchange surface (66) able to be traversed by a heat flow (68) circulating in the member originating from the motor and the electronic circuit when the acoustic enclosure is operating, the heat flow being intended to dissipate in the air (76) outside the acoustic enclosure or to pass into a heat-conducting element outside the acoustic enclosure.

Abstract: The invention relates to an audio processing device (1) including: at least one connector (2, 7), suitable for receiving data defining an input sound signal; a processing module (5, 6) suitable for determining at least one signal intended for a loudspeaker (12, 13) as a function of said defining data, a communication module (8, 9) for communicating with at least one other audio processing device, according to claim 1; said device being characterized in that it furthermore includes a detection module (4) suitable for detecting the proximity of another device according to claim 1 and in that the processing module is suitable for determining said signal intended for the loudspeaker as a function furthermore of a number of other detected device(s).

Abstract: Packaging for an object, preferably having a mass between 2 and 25 kg, comprising a body having at least two parts movable between a closed configuration defining a housing to receive the object, and an open configuration, in which the two parts are separated from one another to allow the object to be removed. The body defining, when closed, a lower face intended to rest on a surface in a bearing direction; and a member fixing the two parts together. The body also comprises a base supporting the object when open, the base defining at least one portion of the lower face of the body when closed. At least one of said parts of the body is situated away from the base when open to arrange direct access to the object in at least one access direction substantially perpendicular to the bearing direction allowing removal of the object.

Abstract: An audio amplifier has an input for an audio signal being amplified and an output powering a load on the basis of the amplified audio signal; a generator of reference voltage of very high linearity and low output impedance, able to receive, as input, the audio signal to be amplified; a power current generator including a power voltage generator whose output is connected to the output of the reference voltage generator through a coupling inductance; and a signal adder introducing, for its control, as input to the power current generator, a signal representative of the current provided as output by the reference voltage generator. The signal adder is able to introduce a signal ( L ? di LOAD dt ) representative of the product of the value of the coupling inductance and the drift with respect to time of the current ( di LOAD dt ) provided to the load.

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: A method is provided for producing a volume gain applied by an amplifier to at least one audio signal according to a desired volume gain selected by a user, which includes calculating a standardized total slow sound level from at least one audio signal, calculating maximum slow volume gain and minimum slow volume gain as the quotient of the product of the desired volume gain by maximum slow gain, respectively by minimum slow gain, divided by the standardized total slow sound level, determining a first minimum out of the desired volume gain and the maximum slow volume gain, determining a second minimum out of the desired volume gain multiplied by a maximum volume gain and the minimum slow volume gain, determining as a slow volume gain the maximum of the first and second previously determined minima, and calculating the volume gain according to the slow volume gain.

Abstract: The input stage (16) of a high-fidelity amplifier (10) with high linearity and a low distortion rate comprises: —an input (12) for the digital signal to be converted;—a voltage output (26) for the converted voltage;—a digital/analog converter (20), the input of which forms the input (12) for the digital signal to be converted, the digital/analog converter (20) having access to a signal terminal (24);—a voltage current conversion resistor (36) arranged between the voltage output (26) and a reference potential; and—a current/voltage converter (22) that has a voltage output and is arranged between the signal terminal (24) and the voltage outlet (26). The current/voltage converter (22) comprises a transistor (46). The source of the transistor (46) is only connected to the signal terminal (24) of the digital/analog converter (20).

Abstract: The present invention concerns a synchronization method for synchronizing at least two systems for rendering multimedia streams, the method comprising: the detection of a pulse of a same signal of fixed frequency by each rendering system and by a main clock system, the generation of a main clock signal and a dependent clock signal, the estimating of a main local date of reception of the subsequent pulse and a dependent local date of reception of the subsequent pulse, the calculation of the difference between the main local date and the dependent local date, the iteration of the preceding steps until a first condition concerning the calculated differences is met, the receiving of a multimedia stream, by each of the rendering systems, the sending of a rendering date, and the calculation of an effective date for the rendering of the multimedia stream.

Abstract: The current-to-voltage converter includes an input for the current to be converted, an output for the converted voltage, a current-to-voltage conversion resistor arranged between the output and a reference potential, a processing circuit including a transistor, the input being connected to the output via the transistor, a twin circuit including components identical to and disposed in a similar way to those of the processing circuit, a voltage follower connected at the input to the processing circuit and at the output to the twin circuit, and means for reinjecting the current at the output of the follower into the processing circuit.

Abstract: The invention relates to a support for an audio system, the audio system comprising a heat source, a discharge surface for the heat and means for conducting at least one portion of the heat produced by the heat source towards the discharge surface. The support further comprises a plate comprising at least one heat-conducting elastic member able to deform for fitting at least one portion of the discharge surface of the audio system, and a thermal dissipation radiator in thermal contact with the elastic member.

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 invention relates to a method implementing at least one loudspeaker comprising at least one module suitable for generating a value representative of an internal operation of the loudspeaker, and a memory unit for storing an alarm criterion relative to the generated value, and control software for controlling the loudspeaker. The method further comprising the steps of the module produces a value representative of the internal operation of the loudspeaker, the loudspeaker compares the generated value and the alarm criterion, and the loudspeaker emits a sound or visual signal if the result of the comparison indicates that the generated value fulfills the alarm criterion.

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: The invention relates to a switching power supply comprising: an input (16) for an input current (IPRI) at an input voltage (VPRI). a controlled transistor bridge (22A1, 22A2, 22B1, 22B2) comprising two branches (22A, 22B) each comprising two series-connected transistors, the two branches (22A, 22B) being connected in parallel to the input terminals (16); a transformer (21) where the primary (25) is connected between the midpoints (26A, 26B) of the two branches (22A, 22B) formed between the series-connected transistors of each branch (22A, 22B); an output for an output current (ISEC) connected to the terminals of a secondary circuit (27) of the transformer (21); and a control unit (23A, 23B, 24) for the transistors to alternately switch each of the midpoints (26A, 26B) between high and low values with a time offset between the switching times of the midpoint values (26A, 26B).

Abstract: An audio amplifier has an input for an audio signal being amplified and an output powering a load on the basis of the amplified audio signal; a generator of reference voltage of very high linearity and low output impedance, able to receive, as input, the audio signal to be amplified; a power current generator including a power voltage generator whose output is connected to the output of the reference voltage generator through a coupling inductance; and a signal adder introducing, for its control, as input to the power current generator, a signal representative of the current provided as output by the reference voltage generator. The signal adder is able to introduce a signal ( L ? di LOAD dt ) representative of the product of the value of the coupling inductance and the drift with respect to time of the current ( di LOAD dt ) provided to the load.

Abstract: Disclosed is the audio amplifier comprising an input for an audio signal to be amplified and an output for powering a load on the basis of the amplified audio signal; a generator of reference voltage of very high linearity and low output impedance, able to receive, as input, the audio signal to be amplified; a power current generator comprising a power voltage generator whose output is connected to the output of the reference voltage generator through a coupling impedance. The coupling impedance comprises two coupling inductances mounted in series between the output of the reference generator and the output of the power voltage generator and an attenuation impedance linking a mid-point between the two coupling inductances and a reference potential, wherein the attenuation impedance includes an attenuation inductance.

Abstract: Packaging for at least one object, preferably having a mass between 2 and 25 kg, comprising a body having at least two parts movable between a closed configuration defining a housing to receive the object, and an open configuration, in which the two parts are separated from one another to allow the object to be removed. The body defining, when closed, a lower face intended to rest on a surface in a bearing direction; and a member fixing the two parts together. The body also comprises a base supporting the object when open, the base defining at least one portion of the lower face of the body when closed. At least one of said parts of the body is situated away from the base when open to arrange direct access to the object in at least one access direction substantially perpendicular to the bearing direction allowing removal of the object.

Abstract: An assembly of electronic devices connected to a computer network comprises a digital data sender device comprising a short-range radioelectric main communication module and a secondary communication module, and a digital data receiver device comprising a short-range radioelectric main communication module and a secondary communication module. The assembly furthermore comprises a digital data transmitter device comprising a processor, a memory for storing the digital data, and a short-range radioelectric communication module able to communicate with the secondary module of the sender device when the transmitter device is in proximity to the sender device, and with the secondary module of the receiver device when the transmitter device is in proximity in the receiver device.