Devialet

Eduardo Mendes

Pierre-Emmanuel Calmel

Antoine Petroff

Jean-Loup Afresne

Bérenger Roig

Julien Bergére

Frédéric Lepoutre

Julien Bergere

Julien BERGÈRE

Frederic Lepoutre

Infinite acoustic baffle () comprising a box () and a loudspeaker () comprising a membrane () that is movable relative to the box (), the box () and the membrane () defining a substantially closed baffle chamber (); the loudspeaker () comprising an electrically controlled motor () for actuating the membrane () that is able to move relative to the box (), the baffle also comprising a mechanism () for axially urging the membrane () away from its median rest position counter to the pressure force exerted on the membrane () by the gas contained in the box () characterized in that the mechanism () comprises a cam () that is movable relative to the box () along an axis (X-X) for displacing of the cam under the displacement action of the membrane () and at least one cam follower (A,B) that is biased transversely to the cam () by at least one spring (A,B) and bears on the cam (), the cam () having at least one cam surface (A,B) capable of converting the transverse force of the or each spring (A,B) into an axial force on the cam (), the intensity of which varies depending on the position of the cam () relative to the box ().

Infinite baffle with low stiffness

This control device for controlling a loudspeaker () in a loudspeaker enclosure, comprises: It comprises an attenuator () that is capable of limiting the predicted current to a limited current value that is lower than a ceiling value by application, to the predicted current, of an attenuation gain which is a function of the predicted current.

Device for controlling a loudspeaker with current limitation

A method is provided for adapting an applied volume gain in an audio amplifier controlling at least one loudspeaker of an enclosure according to a desired volume gain selected by a user on a scale increased by a maximum desired volume gain, including determining effective intensity applied to the loudspeaker, calculating maximum volume gain from the desired volume gain, an effective intensity applied to the at least one loudspeaker, thermal characteristics of the loudspeaker, and the maximum desired volume gain, then calculating a variable applied volume gain according to an increasing monotonic function providing a variable applied volume gain according to the desired volume gain such that the image of the maximum desired volume gain by the monotonic function is equal to the maximum volume gain, and applying to the amplifier as applied volume gain, the minimum of the desired volume gain and the variable applied volume gain.

Method for adapting the volume gain for the power limitation of an amplifier and amplifier

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.

Amplifier with adjustment of the automatic sound level

The present invention relates to a device for controlling a loudspeaker () in an enclosure, comprising: It comprises a control unit comprising:

Device for controlling a loudspeaker

The present invention relates to a device for controlling a loudspeaker () in an enclosure, comprising: It comprises means () for calculating the excitation signal, means () for calculating a desired dynamic value (A) of the diaphragm of the loudspeaker based on the audio signal (S) to be reproduced and the structure of the enclosure, the means () for calculating the desired dynamic value (A) of the loudspeaker diaphragm being able to apply a correction that is different from the identity, and taking account of structural dynamic values (x, v) of the enclosure that are different from the only dynamic values relative to the loudspeaker diaphragm, and the means () for calculating the excitation signal of the loudspeaker being able to calculate the excitation signal based on the desired dynamic value (A) of the loudspeaker diaphragm.

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Chabeuil, France

Eduardo Mendes