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公开(公告)号：US12225349B1
公开(公告)日：2025-02-11
申请号：US17967869
申请日：2022-10-17
Applicant: Meta Platforms Technologies, LLC
Inventor： Limin Zhou
IPC: H04R19/04
Abstract: Embodiments relate to systems and methods for compensating nonlinear distortions. The system receives a signal corresponding to an input sound pressure which is detected by a capacitive MEMS microphone. The capacitive MEMS microphone includes an active capacitance and a parasitic capacitance. The system determines a nonlinear relationship between the signal and the input sound pressure; and determines, based on the signal, an input parameter associated with the active capacitance and the parasitic capacitance. The system further determines an output signal based on the input parameter and the output signal and the input sound pressure have a linear relationship. The system compensates the signal based on the determined output signal and outputs the compensated signal as an output so that the output has the linear relationship with the input sound pressure.
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公开(公告)号：US11743648B1
公开(公告)日：2023-08-29
申请号：US17993727
申请日：2022-11-23
Applicant: Meta Platforms Technologies, LLC
Inventor： Tetsuro Oishi , Rex Pinegar Price , Limin Zhou , Michael Thomas Frank , Joshua James Barr , Michael Lee Butts
CPC classification number: H04R5/033 , H04R1/1091
Abstract: A headset includes a speaker, such as a side firing dipole speaker. The headset includes a front chamber that receives sound waves from a first side of the speaker and a rear chamber that receives sound waves from a second side of the speaker. A control leak channel connects the front chamber and the rear chamber. An acoustic mesh may be located within the control leak channel. The speaker configuration is configured to reduce total harmonic distortion of the speaker, particularly in ranges such as 3-6 kHz, while maintaining the broadband efficiency of the speaker.
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公开(公告)号：US20250106573A1
公开(公告)日：2025-03-27
申请号：US17967880
申请日：2022-10-17
Applicant: Meta Platforms Technologies, LLC
Inventor： Limin Zhou
Abstract: An audio system comprises a loudspeaker configured to generate sound, and an audio controller for performing determining current value(s) of loudspeaker system parameter(s) and dynamic updating of loudspeaker system parameter(s). The audio controller is configured to calculate loudspeaker system parameter(s) according to a ratio of loudspeaker displacement to force applied to the loudspeaker and based on current and voltage measured across a loudspeaker. The loudspeaker system parameter(s) include a total mass parameter that relates to a moving mass of the loudspeaker and a radiation mass of a porting of the loudspeaker. The audio controller is configured to calculate an error as a difference between an expected signal and a measured signal based on the current and/or the voltage. The audio controller is configured to update the loudspeaker system parameter(s) based on the error. The audio controller is configured to deliver audio content via the loudspeaker with the updated loudspeaker system parameter(s).
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公开(公告)号：US20230396920A1
公开(公告)日：2023-12-07
申请号：US18086446
申请日：2022-12-21
Applicant: Meta Platforms Technologies, LLC
Inventor： Limin Zhou
CPC classification number: H04R3/005 , H04R1/406 , H04R2499/11 , H04R2201/403
Abstract: An acoustic device for use in a wearable device (e.g., smart watch) is described. The acoustic device includes a curved primary audio waveguide and a plurality of secondary waveguides. The curved primary waveguide has two ports that open to a local area on opposite ends of the primary audio waveguide. The primary waveguide is coupled to a plurality of secondary audio waveguides. Each secondary audio waveguide couples a different acoustic sensor to the primary audio waveguide. A controller can select a signal from an acoustic sensor, of the at least two acoustic sensors, having the least amount of wind noise. Additionally, in some embodiments, when there is minimal wind noise, the at least two acoustic sensors may be used for beamforming.
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公开(公告)号：US20230345168A1
公开(公告)日：2023-10-26
申请号：US18085382
申请日：2022-12-20
Applicant: Meta Platforms Technologies, LLC
Inventor： Limin Zhou , Simon Porter , Gongqiang Yu
CPC classification number: H04R1/1083 , H04R1/34
Abstract: An acoustic device with a manifold architecture is described. The acoustic device includes a primary waveguide and a manifold. The primary waveguide has a first end, coupled to an acoustic sensor, and a second end, a port open to a local area. The port receives airflow from the local area that includes sound pressure waves from a sound source and turbulent pressure waves. The sound pressure waves and a first portion of the turbulent pressure waves are detected by the acoustic sensor. The manifold includes a plurality of waveguides that are coupled to a portion of the primary waveguide between the first end and second end. The plurality of waveguides has openings to the local area. The manifold vents a second portion of the turbulent pressure waves through the openings, and the second portion of the turbulent pressure waves is larger than the first portion of the turbulent pressure waves.
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Patent Agency Ranking
公开(公告)号：US20230239626A1
公开(公告)日：2023-07-27
申请号：US18127506
申请日：2023-03-28
Applicant: Meta Platforms Technologies, LLC
Inventor： Limin Zhou , Chuming Zhao , Rex Pinegar Price , Mekell Jiles , Kevin Connor
CPC classification number: H04R9/046 , B81B7/02 , H04R29/001 , H04R9/06 , H04R9/045 , B81B2201/04 , H05K1/0271
Abstract: A coil assembly for integration into a transducer is presented. The coil assembly may include a metal bobbin assembly, a wire coil, and one or more nonconductive printed circuit board (PCB) stiffeners. A speaker that renders micro noise in an artificial reality environment for improving simulated presence is further presented. The speaker may generate a plurality of micro noises based in part on the determined state of the virtual object. The speaker may spatialize the plurality of micro noises, such that the plurality of micro noises appears to originate from the virtual object. A speaker for speaker diaphragm motion detection using optical MEMS sensors is further presented. Optical MEMS sensors are used to optically monitor displacement of one or more portions of a speaker diaphragm. The speaker may be configured to determine that a speaker diaphragm is in rocking mode and move the speaker diaphragm out of rocking mode.
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公开(公告)号：US11540055B1
公开(公告)日：2022-12-27
申请号：US17383225
申请日：2021-07-22
Applicant: Meta Platforms Technologies, LLC
Inventor： Tetsuro Oishi , Rex Pinegar Price , Limin Zhou , Michael Thomas Frank , Joshua James Barr , Michael Lee Butts
Abstract: A headset includes a speaker, such as a side firing dipole speaker. The headset includes a front chamber that receives sound waves from a first side of the speaker and a rear chamber that receives sound waves from a second side of the speaker. A control leak channel connects the front chamber and the rear chamber. An acoustic mesh may be located within the control leak channel. The speaker configuration is configured to reduce total harmonic distortion of the speaker, particularly in ranges such as 3-6 kHz, while maintaining the broadband efficiency of the speaker.
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公开(公告)号：US12200429B2
公开(公告)日：2025-01-14
申请号：US18085382
申请日：2022-12-20
Applicant: Meta Platforms Technologies, LLC
Inventor： Limin Zhou , Simon Porter , Gongqiang Yu
Abstract: An acoustic device with a manifold architecture is described. The acoustic device includes a primary waveguide and a manifold. The primary waveguide has a first end, coupled to an acoustic sensor, and a second end, a port open to a local area. The port receives airflow from the local area that includes sound pressure waves from a sound source and turbulent pressure waves. The sound pressure waves and a first portion of the turbulent pressure waves are detected by the acoustic sensor. The manifold includes a plurality of waveguides that are coupled to a portion of the primary waveguide between the first end and second end. The plurality of waveguides has openings to the local area. The manifold vents a second portion of the turbulent pressure waves through the openings, and the second portion of the turbulent pressure waves is larger than the first portion of the turbulent pressure waves.
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公开(公告)号：US11758319B2
公开(公告)日：2023-09-12
申请号：US17665375
申请日：2022-02-04
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Limin Zhou , Gongqiang Yu , Alan Ng
CPC classification number: H04R1/342 , H04R1/1091 , H04R2410/07
Abstract: An acoustic sensor includes port architecture designed to mitigate wind noise. The acoustic sensor includes a primary waveguide having two ports open to a local area surrounding the acoustic sensor. One opening of a secondary waveguide is coupled to portion of the primary waveguide, with another opening of the secondary waveguide coupled to a microphone. The secondary waveguide has a smaller cross-section than the primary waveguide. Hence, airflow is directed from a port of the primary waveguide to the other port of the primary waveguide and back into the local area, bypassing the microphone.
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公开(公告)号：US20230254637A1
公开(公告)日：2023-08-10
申请号：US17665375
申请日：2022-02-04
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Limin Zhou , Gongqiang Yu , Alan Ng
CPC classification number: H04R1/342 , H04R1/1091 , H04R2410/07
Abstract: An acoustic sensor includes port architecture designed to mitigate wind noise. The acoustic sensor includes a primary waveguide having two ports open to a local area surrounding the acoustic sensor. One opening of a secondary waveguide is coupled to portion of the primary waveguide, with another opening of the secondary waveguide coupled to a microphone. The secondary waveguide has a smaller cross-section than the primary waveguide. Hence, airflow is directed from a port of the primary waveguide to the other port of the primary waveguide and back into the local area, bypassing the microphone.
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