公开(公告)号：US12096189B2

公开(公告)日：2024-09-17

申请号：US17600210

申请日：2020-03-27

Applicant: Bose Corporation

Inventor： Elie Bou Daher ,  Cristian Marius Hera

IPC: H04R3/00 ,  G10K11/178

CPC classification number: H04R3/007 ,  G10K11/17854 ,  H04R2430/01

Abstract: Audio systems, methods, and computer readable media for managing audio headroom are provided. At least two input signals are received and combined. The combined signals is compared to a threshold value and may be adjusted if the combined signal exceeds the threshold value. A gain is applied to the first input signal based upon the combined signal being above the threshold value. The gain may be an attenuating gain. Accordingly, a gain is applied to at least one input signal to reduce the input signal when a combination of the input signals exceeds a threshold value.

公开(公告)号：US20240236563A1

公开(公告)日：2024-07-11

申请号：US18611328

申请日：2024-03-20

Applicant: Elliptic Laboratories AS

Inventor： Guenael Thomas STRUTT

IPC: H04R3/00 ,  G01S15/04 ,  H04R29/00

CPC classification number: H04R3/007 ,  G01S15/04 ,  H04R29/001 ,  H04R2400/01 ,  H04R2430/01 ,  H04R2499/11

Abstract: The invention relates to a method and system for detection of an object in proximity to an electronic device, which method comprises the steps of:—producing, via the processing unit using one or more parameters relating to a loudspeaker, a controlled audio signal;—amplifying using an amplifier at least said controlled audio signal, thereby producing an amplified audio signal at an amplifier output; wherein an amplitude of the controlled audio signal is such that the amplified audio signal is less than or equal to an amplitude determined to be safe for the loudspeaker in view of the one or more parameters,—analyzing at least one of said one or more parameters relating to the loudspeaker to detect a change in response of the loudspeaker; the change in response being caused by an object that is present in the acoustical path of the loudspeaker,—determining, based upon the analysis whether the object is located in close proximity to the electronic device.

公开(公告)号：US20240223980A1

公开(公告)日：2024-07-04

申请号：US17996263

申请日：2021-10-13

Applicant: Google LLC

Inventor： Lei Chen ,  Yahsin Chou ,  Shin-Horng Chen

IPC: H04R29/00 ,  G01R19/12 ,  H04R3/00

CPC classification number: H04R29/003 ,  G01R19/12 ,  H04R3/007 ,  H04R2499/11

Abstract: In general, various aspects of the techniques are directed to transducer excursion correction. A computing device comprising a memory and a processor may be configured to perform the techniques. The memory may store voltage measurements representative of voltage across a transducer and current measurements representative of current through the transducer. The processor may identify a first voltage measurement of the voltage measurements and a first current measurement of the current measurements associated with nonlinear vibration of the transducer. The processor may perform a principal component analysis with respect to the first voltage measurement and the first current measurement to obtain a principal component representative of variation of the voltage across and the current through the transducer. The processor may modify, based on the principal component, an input voltage to be applied across the transducer to reduce the nonlinear vibration of the transducer.

公开(公告)号：US20240187776A1

公开(公告)日：2024-06-06

申请号：US18440981

申请日：2024-02-14

Applicant: Waves Audio Ltd.

Inventor： Gabriel Zeltzer ,  Meir Shaashua

IPC: H04R1/10 ,  G10K11/178 ,  H04R3/00 ,  H04R3/06 ,  H04R7/04 ,  H04R7/18 ,  H04R19/00 ,  H04R19/02 ,  H04R29/00

CPC classification number: H04R1/1041 ,  G10K11/17825 ,  G10K11/17827 ,  H04R1/1016 ,  H04R1/1025 ,  H04R1/1075 ,  H04R3/06 ,  H04R7/04 ,  H04R7/18 ,  H04R19/00 ,  H04R19/02 ,  H04R29/001 ,  G10K2210/3026 ,  H04R3/007 ,  H04R2430/01

Abstract: Controlling operation of an electrostatic acoustic device including a membrane and an electrode disposed proximate to the membrane. A probe signal varying at radio frequency is injected into the electrode. A current or charge signal is detected by converting the current or charge signal to a modulated voltage signal. The current or charge signal includes an audio signal varying at audio frequencies modulating the radio frequency of the probe signal. The modulated voltage signal is demodulated to produce an audio output signal varying at audio frequency. The audio output signal is transformed to produce an error signal. A control signal is input to the electrostatic acoustic device responsive to the error signal. The control signal is configured to cancel at least in part a mechanical response of the membrane due to ambient noise.

公开(公告)号：US12003927B2

公开(公告)日：2024-06-04

申请号：US17633102

申请日：2020-08-14

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Luca Revelli ,  William Joseph Dymek

IPC: H04R29/00 ,  G10L21/0232 ,  H03G3/30 ,  H04R3/00 ,  H04R3/04 ,  H04R9/06 ,  H04S3/00 ,  H04S7/00

CPC classification number: H04R29/001 ,  G10L21/0232 ,  H03G3/3005 ,  H04R3/007 ,  H04R3/04 ,  H04R9/06 ,  H04R29/003 ,  H04S3/008 ,  H04S7/301 ,  H04S2400/01

Abstract: A method is provided, including: defining a plurality of frequency bins; sending, during a training phase, a test signal at different amplitude levels to one or more speakers, and gathering resulting test voltage (V) and current (I) points for the different amplitude levels and for each frequency bin; for each frequency bin, applying a linear regression algorithm to the gathered test voltage and current points for the different amplitudes to obtain a reference electrical impedance of said one or more speakers; sending, during a monitoring phase subsequent to said training phase, an audio signal to said one or more speakers, and gathering resulting new voltage and current points to obtain an operating electrical impedance for said one or more speakers for each frequency bin, determining a deviation between the operating and the reference electrical impedance, and, if the deviation exceeds a defined tolerance, reporting the deviation to a user.

公开(公告)号：US11997466B2

公开(公告)日：2024-05-28

申请号：US17851089

申请日：2022-06-28

Applicant: Audera Acoustics Inc.

Inventor： John B. French

IPC: H04R9/06 ,  H04R3/00 ,  H04R3/04 ,  H04R3/08 ,  H04R9/02 ,  H04R9/04 ,  H04R29/00

CPC classification number: H04R9/046 ,  H04R3/002 ,  H04R3/007 ,  H04R3/04 ,  H04R3/08 ,  H04R9/025 ,  H04R9/043 ,  H04R9/06 ,  H04R9/063 ,  H04R29/001 ,  H04R29/003

Abstract: Acoustic transducer systems and methods of operating acoustic transducer systems are provided. The methods can involve: receiving an input audio signal; determining a position of a diaphragm; determining a correction factor, a motor force factor, a spring error factor, and a system spring factor based at least on the position of the diaphragm; determining a corrected voice coil current based at least on the input audio signal, the correction factor, the spring error factor, and a velocity of the diaphragm; and applying a corrected audio signal to a voice coil fixed to the diaphragm based at least on the corrected voice coil current, wherein the corrected audio signal corrects the input audio signal to compensate for non-linear characteristics of the acoustic transducer system.

公开(公告)号：US20240136809A1

公开(公告)日：2024-04-25

申请号：US18379555

申请日：2023-10-11

Applicant: Texas Instruments Incorporated

Inventor： Supriyo Palit ,  Arthur Brown ,  Mohammad Atiqur Rahman

IPC: H02H9/02 ,  H04R3/00 ,  H04R17/00

CPC classification number: H02H9/02 ,  H04R3/007 ,  H04R17/00

Abstract: An example apparatus includes: programmable circuitry configured to execute machine-readable instructions to: receive first voltages representative of an input signal; receive second voltages and currents, the second voltages and currents representative of voltages and currents of filter circuitry responsive to the first voltages; and determine a transfer function based on the first voltages and the second voltages and currents, the transfer function having coefficients representing the filter circuitry.

公开(公告)号：US11949382B2

公开(公告)日：2024-04-02

申请号：US17894799

申请日：2022-08-24

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Philip Clarkin ,  Ivan Perry ,  Mark H. Tovell ,  Roberto Napoli ,  David Rhodes

IPC: H03F1/02 ,  H03F3/217 ,  H03M1/12 ,  H04R3/00

CPC classification number: H03F1/0227 ,  H03F3/217 ,  H03M1/12 ,  H04R3/007 ,  H03F2200/03

Abstract: The present disclosure relates to circuitry comprising: amplifier circuitry configured to receive a variable supply voltage, wherein the supply voltage varies according to an output signal of the amplifier circuitry; monitoring circuitry configured to monitor one or more parameters of an output signal of the amplifier circuitry; and processing circuitry configured to receive an indication of the voltage of the variable supply voltage and an indication of the monitored parameters from the monitoring circuitry and to apply a correction to one or more of the monitored parameters to compensate for coupling between the variable supply voltage and the monitoring circuitry.

公开(公告)号：US20240064462A1

公开(公告)日：2024-02-22

申请号：US18228950

申请日：2023-08-01

Applicant: ALPS ALPINE CO., LTD.

Inventor： Yuji SAITO ,  Hiroyuki TAGUCHI ,  Katsuhiko EGAMI ,  Hiroki TOITA

IPC: H04R3/00 ,  H04R3/08 ,  H04R29/00 ,  H04R9/02

CPC classification number: H04R3/007 ,  H04R3/08 ,  H04R29/001 ,  H04R9/022 ,  H04R2430/01 ,  H04R9/06

Abstract: In implementations of an audio system, when overheating of a speaker is detected, a controller controls first and second selectors to input an audio signal output by an audio source device to a cooling processing section and cause output of the cooling processing section to be output to the speaker. In the cooling processing section, a mixer mixes an audio signal obtained by removing a low-frequency component from the input audio signal by a high-pass filter with a cooling signal at an infrasonic frequency generated by a cooling signal generator and adjusted with a gain by a gain adjuster. An audio signal obtained by mixing the audio signal with the cooling signal is output from the cooling processing section via a nonlinear inverse filter. A gain setting section sets the gain such that power of the cooling signal matches power of the low-frequency component extracted by a low-pass filter.

公开(公告)号：US20240048897A1

公开(公告)日：2024-02-08

申请号：US18492237

申请日：2023-10-23

Applicant: Sonos, Inc.

Inventor： Tony Doy

IPC: H04R1/28 ,  H04R3/00 ,  H04R29/00

CPC classification number: H04R1/2834 ,  H04R3/007 ,  H04R29/001 ,  H04R27/00

Abstract: Example techniques may involve controlling a passive radiator. An implementation may include a device receiving, via a network interface, audio content and generating an audio signal representing the audio content. Generating the audio signal involves modifying portions of the audio content to limit excursion of the speaker driver to less than an excursion limit when a forward prediction model indicates that the portions of the audio content are predicted to cause the speaker driver to move beyond the excursion limit. While playing back the generated audio signal via the audio stage, the device detects, via a sensor, clipping of the speaker driver and generates a feedback signal based on the detected clipping of the speaker driver. The device adjusts the forward prediction model based on the generated feedback signal.