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公开(公告)号：US20190306605A1
公开(公告)日：2019-10-03
申请号：US16307575
申请日：2017-06-13
Applicant: FOCAL JMLAB
Inventor： Ludovic Uhring-Cadart , Clement Auzou , Arnaud Cazes Bouchet
IPC: H04R1/10
Abstract: The invention relates to a broadband electrodynamic transducer for headphones, said transducer comprising:—a magnetic motor designed to generate a magnetic field;—a coil that is disposed in the air gap of the magnetic motor and can move translationally under the effect of the magnetic field; and—a membrane that is connected to the coil in such a way as to convert the translational movement of the coil into an acoustic wave;—the transducer comprising a self-supporting coil that is glued to the membrane, the membrane having a Young's modulus of more than 40 GPa.
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公开(公告)号：USD856964S1
公开(公告)日：2019-08-20
申请号：US29623111
申请日：2017-10-23
Applicant: FOCAL JMLAB
Designer： Alain Pineau
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公开(公告)号：USD856963S1
公开(公告)日：2019-08-20
申请号：US29623109
申请日：2017-10-23
Applicant: FOCAL JMLAB
Designer： Alain Pineau
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公开(公告)号：USD769845S1
公开(公告)日：2016-10-25
申请号：US29530779
申请日：2015-06-19
Applicant: FOCAL JMLAB
Designer： Alain Pineau
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公开(公告)号：US20250158584A1
公开(公告)日：2025-05-15
申请号：US18834318
申请日：2023-01-25
Applicant: Focal jmlab
Inventor： Christian Jury , Ludovic Uhring-Cadart , Michel Marandon
Abstract: The invention relates to a high-performance audio amplifier intended to control at least one loudspeaker, the amplifier comprising a pre-amplification stage that receives an input signal, a power amplification stage connected to the pre-amplification stage and a feedback that delivers to the pre-amplification stage an image of the output signal, the power amplification stage comprising two power supply circuits comprising a MOSFET transistor. The invention is characterized in that it comprises: a sub-circuit for assisting with charging, a sub-circuit for assisting with discharging said MOSFET transistor, and a voltage-shifting sub-circuit.
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Patent Agency Ranking
公开(公告)号：US11981239B2
公开(公告)日：2024-05-14
申请号：US18032498
申请日：2021-10-21
Applicant: FOCAL JMLAB
Inventor： Léo Guadagnin , Arnaud Cazes Bouchet
CPC classification number: B60N2/879 , B60R11/0223 , B64D11/00154 , B60R2011/0017 , B60R2011/0043
Abstract: The invention relates to a sound-equipped headrest comprising —at least one woofer associated with an open rear part, comprising a rear grid and/or open cell or semi-open cell foam with a density of between 8 and 60 kg/m3, so that said at least one woofer is two-directional; and —at least one mid-range/tweeter, associated with a closed rear part comprising a solid wall and/or a closed cell foam so that at least one mid-range/tweeter is mono-directional.
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公开(公告)号：US10820111B2
公开(公告)日：2020-10-27
申请号：US16061552
申请日：2016-11-15
Applicant: FOCAL JMLAB
Inventor： Giuliano Nicoletti
Abstract: A circular acoustic membrane having an upper surface and an opposite lower surface, said membrane being intended to be coupled, at the lower surface thereof, to a mobile winding via a support. The membrane has an annular fold concentrically delimiting, in the membrane, a circular central portion and an annular peripheral portion. In addition, the central portion has a concavity turned towards the upper surface and the internal edge of the fold is carried by the lower surface and comprises an attachment surface intended for the coupling of said support of the coil.
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公开(公告)号：US10306353B2
公开(公告)日：2019-05-28
申请号：US15561277
申请日：2016-03-18
Applicant: FOCAL JMLAB
Inventor： Shintaro Hosoi
Abstract: The invention relates to an acoustic impedance matching device arranged so as to be mounted behind a loudspeaker. Said device comprises a chamber at least partially filled with an absorbent material. Said device is characterized in that the cross-section of the chamber increases with the distance from the loudspeaker, and the density of the absorbent material increases with the distance from the loudspeaker.
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公开(公告)号：US10171913B2
公开(公告)日：2019-01-01
申请号：US15565782
申请日：2016-04-12
Applicant: FOCAL JMLAB
Inventor： Giuliano Nicoletti
Abstract: The invention relates to a suspension device for a loudspeaker, comprising an annular outer edge that is able to fasten the suspension device to a frame, an annular inner edge that is able to fasten the suspension device to a membrane, a suspension hoop that extends annularly between the edges, said suspension hoop being able to absorb movement stresses produced at the inner edge by means of a deformation that thus forms a resonance mode, the suspension hoop comprising at least one annular protuberance that is positioned so as to minimize the at least one resonance mode of the suspension hoop, the mass of the at least one annular protuberance being between 150% and 400% the mass of a part of the suspension hoop on which the at least one annular protuberance is positioned.
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公开(公告)号：US20230388684A1
公开(公告)日：2023-11-30
申请号：US18031280
申请日：2021-10-12
Applicant: FOCAL JMLAB
Inventor： Alexis Potron
CPC classification number: H04R1/025 , H04R3/02 , H04R29/001 , H04R1/2811 , H04R2499/13
Abstract: The invention relates to a processing device for processing an input signal (Si), generating an output signal (So) intended to be fed to a loudspeaker, said device comprising a processing line (Lt) comprising: an estimation module for estimating expected movements (Da) of the loudspeaker based on the input signal (Si); a determination module for determining an adaptive control signal (CmdA) to be transmitted to the loudspeaker in order to get as close as possible to the expected movements (Da) while correcting the nonlinearities of the loudspeaker; at least one transmission line (L1, L2) for the input signal (Si), delivering at least one non-adaptive control signal (Cmd1); and an adder, delivering the output signal (So) by summing the adaptive control signal (CmdA) and the at least one non-adaptive control signal (Cmd1).
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