公开(公告)号：US20240205624A1

公开(公告)日：2024-06-20

申请号：US18125014

申请日：2023-03-22

Applicant: Shengzhou Greatt Electronics Co., Ltd.

Inventor： Shanjun DING

IPC: H04R29/00 ,  H04R9/02 ,  H04R9/06 ,  H04R31/00

CPC classification number: H04R29/003 ,  H04R9/025 ,  H04R9/06 ,  H04R31/00

Abstract: A surface treatment method of magnetic circuit of loudspeaker includes: S1, assembling components of the magnetic circuit; S2, painting treatment; S3, assembling the loudspeaker; and S4, testing and packaging. In the S1, a T yoke and a magnet are cleaned with a detergent to ensure that adhered surfaces do not remain any pollutants, and surfaces of the T yoke and the magnet are mechanically treated by one of grinding, sanding and sandblasting to obtain a better adhered effect. By painting the surface of the magnetic circuit, the method repairs surface defects of the magnetic circuit, improves the product quality, provides a personalized design, increases the diversity of the product appearance, and makes the product more marketable. The method is simple and mature, and the cost is low. The method integrates components of the loudspeaker by painting, making the product appearance more beautiful and protective without affecting the product performance.

公开(公告)号：US20230328448A1

公开(公告)日：2023-10-12

申请号：US18335621

申请日：2023-06-15

Applicant: Clean Energy Labs, LLC

Inventor： Joseph F. Pinkerton ,  David A. Badger ,  James A. Andrews ,  William Martin Lackowski ,  William Neil Everett

IPC: H04R9/04 ,  H04R9/02 ,  H04R29/00

CPC classification number: H04R9/041 ,  H04R9/025 ,  H04R29/003 ,  H04R2400/07

Abstract: Electroacoustic drivers that can be utilized in loudspeaker systems that utilize drivers having a magnetic negative spring (MNS) (such as reluctance assist drivers (RAD) and permanent magnet crown (PMC) drivers). The electroacoustic drivers can be used at all audio frequencies, including subwoofer frequencies. The magnetic negative springs of the electroacoustic drivers can cancel, or partially cancel, the large pressure forces on a sound panel (of an audio speaker) so that substantial subwoofer notes can be efficiently and cost effectively produced in small/portable speakers. The electroacoustic drivers can include a stabilizing/centering mechanism to overcome the destabilizing forces of a MNS that are too large for a voice coil alone to produce.

公开(公告)号：US09980068B2

公开(公告)日：2018-05-22

申请号：US14073324

申请日：2013-11-06

Applicant: Analog Devices Global

Inventor： Kim Spetzler Berthelsen ,  Kasper Strange

IPC: H04R29/00 ,  H03F1/52 ,  H03G11/04 ,  H03G9/00 ,  H04R3/00 ,  H04R1/00 ,  H03G7/08

CPC classification number: H04R29/001 ,  H03F1/52 ,  H03F2200/462 ,  H03F2200/471 ,  H03G7/08 ,  H03G9/005 ,  H03G11/04 ,  H04R1/00 ,  H04R3/002 ,  H04R3/007 ,  H04R29/00 ,  H04R29/003

Abstract: A method of estimating diaphragm excursion of an electrodynamic loudspeaker may be performed using audio signals. An audio output signal may be applied to a voice coil of the electrodynamic loudspeaker through an output amplifier to produce sound. A detected voice coil current and a determined voice coil voltage may be applied to a linear adaptive digital loudspeaker model that has a plurality of adaptive loudspeaker parameters. The parameter values of the adaptive loudspeaker parameters may be computed based on the linear adaptive digital loudspeaker model and applied to a non-linear state-space model of the electrodynamic loudspeaker. For the non-linear state-space model, a predetermined non-linear function may be applied to at least one of the plurality of received parameter values to compute at least one non-linearity compensated parameter value of the adaptive loudspeaker parameters, to determine an instantaneous excursion of the diaphragm.

公开(公告)号：US09923363B2

公开(公告)日：2018-03-20

申请号：US14416425

申请日：2013-07-22

Applicant: YAMAHA CORPORATION

Inventor： Jun Ishii ,  Kenta Ohnishi

IPC: H02H3/08 ,  H04R3/00 ,  H04R29/00 ,  G01K7/00 ,  G01K13/00 ,  G01K7/42 ,  G10H3/22

CPC classification number: H02H3/085 ,  G01K7/00 ,  G01K7/427 ,  G01K13/00 ,  G01K2217/00 ,  G10H3/22 ,  G10H2220/351 ,  H04R3/007 ,  H04R29/003

Abstract: An audio signal that is output from a sound source circuit (14) is caused to flow through a coil (16) in a transducer for vibrating a soundboard, and the vibration of the soundboard generates an acoustic signal. A microcomputer (30) calculates a temperature of the coil (16) with high accuracy by inputting an ambient temperature (Ta) detected by an ambient temperature sensor (21) and a voltage (V) applied to the coil (16) and executing computation based on a thermal equivalent circuit of an acoustic signal converter using the ambient temperature and the voltage that are input thereto, the computation including calculation of an amount of electric power consumed in the coil (16) using the input voltage.

公开(公告)号：US09883305B2

公开(公告)日：2018-01-30

申请号：US15125877

申请日：2015-03-19

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Par Gunnars Risberg ,  Ylva Bjork ,  Ebba Wilhelmsson ,  Landy Toth

IPC: H04R3/04 ,  H04R29/00 ,  H04R3/00

CPC classification number: H04R29/003 ,  H04R3/002 ,  H04R3/007 ,  H04R3/04 ,  H04R29/001

Abstract: A nonlinear control system includes a controller, a model updater, and a model. The controller is configured to accept one or more input signals, and one or more updates generated by the model updater to produce one or more control signals. The system is configured to drive one or more transducers with the control signals to produce a rendered audio stream therefrom. The model updater is configured to analysis one or more portions of the audio stream and to update one or more aspects of the controller so as to alter performance of the transducer.

公开(公告)号：US20170345438A1

公开(公告)日：2017-11-30

申请号：US15365268

申请日：2016-11-30

Applicant: Broadcom Corporation

Inventor： Jes Thyssen

IPC: G10L21/0232 ,  H04R3/00 ,  H04R3/04

CPC classification number: H04R3/007 ,  G10L21/0232 ,  H03G3/3005 ,  H04R3/04 ,  H04R9/06 ,  H04R29/001 ,  H04R29/003 ,  H04R2499/11

Abstract: Systems, devices, and methods are described for providing loudspeaker protection and distortion suppression. An upstream loudspeaker model estimation component receives sensed electrical characteristics of a loudspeaker and generates an impedance model from which an excursion model of the loudspeaker and a gain change parameter may be generated. The impedance components are fitted to features of an estimated impedance, based on the sensed characteristics, to generate the estimated impedance model that is converted to an excursion model of the loudspeaker. A downstream audio signal processing component, based on the excursion model, or parameters thereof, limits a predicted excursion of the loudspeaker utilizing excursion-constraining processing circuitry that includes a non-linear constraint filter. Processed audio signals associated with the limited excursion are subject to distortion suppression prior to releasing the output audio signals for playback on the loudspeaker. Distortion suppression is performed based on a determined relationship between processed and pre-processed audio signals.

公开(公告)号：US09820069B2

公开(公告)日：2017-11-14

申请号：US15011460

申请日：2016-01-29

Applicant: AACTechnologies Pte. Ltd.

Inventor： Yang Zhang

IPC: H04R1/00 ,  H04R29/00 ,  H04R1/06 ,  H04R7/12 ,  H04R9/06 ,  H04R7/18 ,  H04R3/00

CPC classification number: H04R29/003 ,  H04R1/06 ,  H04R3/002 ,  H04R7/127 ,  H04R7/18 ,  H04R9/06 ,  H04R2307/027 ,  H04R2307/204 ,  H04R2499/11

Abstract: A micro speaker is disclosed. The micro speaker includes a diaphragm and a voice coil for driving the diaphragm, the diaphragm including a conductive dome and a suspension surrounding the conductive dome; a conductive front cover located adjacent to and keeping a distance from the conductive dome, the conductive front cover including a plurality of units being isolated from each other; and a plurality of capacitors formed by the units of conductive front cover and the conductive dome for outputting electrical signals according to vibrations of the diaphragm and for detecting real-time replacement of the diaphragm.

公开(公告)号：US09820066B2

公开(公告)日：2017-11-14

申请号：US15010949

申请日：2016-01-29

Applicant: AACTechnologies Pte. Ltd.

Inventor： Yang Zhang

IPC: H04R1/00 ,  H04R29/00 ,  H04R9/06 ,  H04R7/12 ,  H04R7/18

CPC classification number: H04R29/003 ,  H04R1/06 ,  H04R7/127 ,  H04R7/18 ,  H04R9/06 ,  H04R2307/204

Abstract: A micro speaker is disclosed. The micro speaker includes a diaphragm and a voice coil for driving the diaphragm, the diaphragm including a conductive dome a suspension surrounding the conductive dome; a conductive front cover located adjacent to and keeping a distance from the conductive dome; and a capacitor formed by the conductive dome and the conductive front cover for outputting electrical signals according to vibrations of the diaphragm and for detecting real-time replacement of the diaphragm.

公开(公告)号：US20170264996A1

公开(公告)日：2017-09-14

申请号：US15454757

申请日：2017-03-09

Applicant: MrSpeakers, LLC

Inventor： Daniel William Clark ,  Robert Jason Egger

IPC: H04R1/28 ,  H04R1/10

CPC classification number: H04R1/1008 ,  H04R3/04 ,  H04R9/06 ,  H04R19/02 ,  H04R29/001 ,  H04R29/003 ,  H04R31/00 ,  H04R2420/07

Abstract: A loudspeaker assembly may be configured with at least one driver disposed between first and second acoustic impedance structures. The first and second impedance structures can be arranged with one or more layers that have similar, or dissimilar, thicknesses. The first and second impedance structures can respectively be configured to maintain symmetric acoustic impedance on opposite sides of the driver during operation of the driver.

公开(公告)号：US20170257686A1

公开(公告)日：2017-09-07

申请号：US15598527

申请日：2017-05-18

Applicant: NXP B.V.

Inventor： Temujin Gautama ,  Alan OCinneide ,  Lutsen Ludgerus Albertus Hendrikus Dooper

IPC: H04R1/00 ,  H04R3/00

CPC classification number: H04R1/00 ,  H04R3/00 ,  H04R3/002 ,  H04R3/007 ,  H04R29/001 ,  H04R29/003

Abstract: A loudspeaker controller (1) for controlling a loudspeaker (2), configured to determine time-varying impedance information of the loudspeaker (2) based on a loudspeaker voltage and a measure of a loudspeaker current and provide for control of the loudspeaker (2) in accordance with said time-varying impedance information.