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公开(公告)号：US20220322028A1
公开(公告)日：2022-10-06
申请号：US17220588
申请日：2021-04-01
发明人： Michaela Warnecke , Pablo Francisco Faundez Hoffmann , Vamsi Krishna Ithapu , Sebastian-Teodor Prepelita , Philip Robinson
IPC分类号： H04S7/00
摘要： An audio system includes a plurality of transducers, one or more acoustic sensors, and a controller. The plurality of transducers transmits an ultrasonic beam towards an ear of a user. The one or more acoustic sensors detect a reflected signal generated by an interaction of the ultrasonic beam with the ear. The controller updates a three-dimensional geometry of the ear based on the reflected signal. The controller determines a head-related transfer function (HRTF) for the user based in part on the three-dimensional geometry of the ear.
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公开(公告)号：US20230093585A1
公开(公告)日：2023-03-23
申请号：US17480740
申请日：2021-09-21
摘要： An audio system for spatializing virtual sound sources is described. A microphone array of the audio system is configured to monitor sound in a local area. A controller of the audio system identifies sound sources within the local area using the monitored sound from the microphone array and determines their locations. The controller of the audio system generates a target position for a virtual sound source based on one or more constraints. The one or more constraints include that the target position be at least a threshold distance away from each of the determined locations of the identified sound sources. The controller generates one or more sound filters based in part on the target position to spatialize the virtual sound source. A transducer array of the audio system presents spatialized audio including the virtual sound source content based in part on the one or more sound filters.
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公开(公告)号：US20220182772A1
公开(公告)日：2022-06-09
申请号：US17677902
申请日：2022-02-22
发明人： Peter Harty Dodds , Nava K. Balsam , Vamsi Krishna Ithapu , William Owen Brimijoin, II , Samuel Clapp , Christi Miller , Michaela Warnecke , Nils Thomas Fritiof Lunner , Paul Thomas Calamia , Morteza Khaleghimeybodi , Pablo Francisco Faundez Hoffmann , Ravish Mehra , Salvael Ortega Estrada , Tetsuro Oishi
摘要： Embodiments relate to an audio system for various artificial reality applications. The audio system performs large scale filter optimization for audio rendering, preserving spatial and intra-population characteristics using neural networks. Further, the audio system performs adaptive hearing enhancement-aware binaural rendering. The audio includes an in-ear device with an inertial measurement unit (IMU) and a camera. The camera captures image data of a local area, and the image data is used to correct for IMU drift. In some embodiments, the audio system calculates a transducer to ear response for an individual ear using an equalization prediction or acoustic simulation framework. Individual ear pressure fields as a function of frequency are generated. Frequency-dependent directivity patterns of the transducers are characterized in the free field. In some embodiments, the audio system includes a headset and one or more removable audio apparatuses for enhancing acoustic features of the headset.
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公开(公告)号：US20220038832A1
公开(公告)日：2022-02-03
申请号：US16943517
申请日：2020-07-30
IPC分类号： H04R25/00
摘要： An in-ear device occludes an ear canal of an ear of a user. The in-ear device is configured to be calibrated such that the user perceives audio content as though the in-ear device is not occluding the ear canal. A transducer of the in-ear device presents audio content, and an inner microphone of the in-ear device detects sound pressure data within the ear canal. A controller of the in-ear device determines a blocked sound pressure at the entrance to the ear canal based on sound pressure data from an outer microphone. The controller generates sound filters custom to the user based in part on the detected sound pressure within the ear canal and the blocked sound pressure at the entrance to the ear canal. The controller adjusts audio content using the sound filter, and the transducer presents the adjusted audio content to the user.
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公开(公告)号：US20220030377A1
公开(公告)日：2022-01-27
申请号：US17498544
申请日：2021-10-11
摘要： Embodiments relate to an audio system that performs equalization of audio signals based on one or more diffuse field head-related transfer functions (HRTFs) and device-specific data. User-specific data and device-specific data (i.e., transducer-specific data) are applied to an acoustic model to predict an acoustic response for a user. An equalization filter is then determined using the acoustic response and the one or more diffuse field HRTFs. The equalization filter is applied to a processed version of an audio signal to create a modified version of the audio signal. The modified version of the audio signal is presented to the user via a transducer array of the audio system. The audio system can further include a microphone assembly that reduces the Helmholtz resonance effect.
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公开(公告)号：US20220030369A1
公开(公告)日：2022-01-27
申请号：US16934673
申请日：2020-07-21
摘要： An audio system calibrates a virtual microphone using displacement of an outer ear of a user. A transducer presents audio content to the user. One or more sensors monitor displacement of a portion of a pinna of the user. The displacement may be caused in part by the presented audio content. The audio system estimates a sound pressure at an entrance to an ear canal of the user based on the monitored displacement of the portion of the pinna, generates a sound filter accordingly, and adjusts audio content using the sound filter. The transducer presents the adjusted audio content to the user, thereby improving the user's auditory experience.
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公开(公告)号：US20210029484A1
公开(公告)日：2021-01-28
申请号：US17066975
申请日：2020-10-09
摘要： A headset comprises a frame and an audio system. The audio system includes a microphone assembly positioned on the frame in a detection region, the detection region external to an ear of a user wearing the headset, and within a threshold distance from an ear canal of the ear, the microphone assembly configured to detect an audio signal emitted from an audio source, wherein the audio signal detected at the detection region is within a threshold degree of similarity of a sound pressure wave at the ear canal of the user, and an audio controller configured to determine a set of head-related transfer functions (HRTFs) based in part on the detected audio signal.
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公开(公告)号：US11234095B1
公开(公告)日：2022-01-25
申请号：US16880187
申请日：2020-05-21
发明人： Sang-Ik Cho , Pablo Francisco Faundez Hoffmann , Karol Constantine Hatzilias , Gregory Olegovic Andreev
摘要： An audio system (e.g., of an artificial reality headset) determines a position of the headset relative to a position of a head of a user wearing the headset. The determination is based in part on an image of a portion of the head from a tracking camera (e.g., eye tracking and/or face tracking) on the headset. The audio system adjusts an acoustic parameter based in part on the determined position of the headset. The audio system performs an action that uses the adjusted acoustic parameter.
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公开(公告)号：US11234092B2
公开(公告)日：2022-01-25
申请号：US17066975
申请日：2020-10-09
摘要： A headset comprises a frame and an audio system. The audio system includes a microphone assembly positioned on the frame in a detection region, the detection region external to an ear of a user wearing the headset, and within a threshold distance from an ear canal of the ear, the microphone assembly configured to detect an audio signal emitted from an audio source, wherein the audio signal detected at the detection region is within a threshold degree of similarity of a sound pressure wave at the ear canal of the user, and an audio controller configured to determine a set of head-related transfer functions (HRTFs) based in part on the detected audio signal.
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公开(公告)号：US11178481B2
公开(公告)日：2021-11-16
申请号：US16940693
申请日：2020-07-28
发明人： Tetsuro Oishi , Morteza Khaleghimeybodi , Pablo Francisco Faundez Hoffmann , Alan Ng , Antonio John Miller , Gongqiang Yu , Chuming Zhao
摘要： An ear-plug assembly presents audio content to an ear canal of a user. The audio content may be based in part on sound in a local area surrounding the user. The ear-plug assembly detects, via one or more acoustic sensors, sound in the area around the user. The sound waves travel through an aperture in a body of the ear-plug assembly and are propagated to a waveguide to the one or more acoustic sensors. The ear-plug assembly processes the detected sound data in a controller, which instructs a speaker assembly to present audio content based in part on the detected sound data. The detected sounds may be amplified, attenuated, filtered, and/or augmented when presented by the speaker assembly.
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