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公开(公告)号：US20220232342A1
公开(公告)日：2022-07-21
申请号：US17714638
申请日：2022-04-06
发明人： Ashutosh Pandey , Buye Xu , FNU Anurag Kumar , Jacob Ryan Donley , Paul Thomas Calamia , DeLiang Wang , Chuming Zhao , Nils Thomas Fritiof Lunner , Antonio John Miller , Manoel Francisco Soares Neto
摘要： Embodiments of the present disclosure relate to an audio system for artificial reality applications. One or more transducers of the audio system output, in accordance with audio instructions, one or more ultrasonic pressure waves simulating a virtual audio source near an ear of a user of the headset. A controller of the audio system generates the audio instructions such that the one or more ultrasonic pressure waves form at least a portion of audio content for presentation to the user. An array of microphones of the audio system detects audio signals in a local area. A deep neural network of the audio system processes the detected audio signals to generate enhanced audio content, and the one or more transducers present the enhanced audio content to a user.
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公开(公告)号：US20220201388A1
公开(公告)日：2022-06-23
申请号：US17130290
申请日：2020-12-22
摘要： An audio system comprises an array of transparent piezoelectric transducers on a transparent surface. Each transparent piezoelectric transducer includes one or more piezoelectric layers and one or more conductive layers that are substantially transparent to visible light. A transparent piezoelectric transducer may include, e.g., a first conductive layer, a first piezoelectric layer on the first conductive layer, and a second conductive layer on the first piezoelectric layer. Or in another example, the transparent piezoelectric transducer includes many (e.g., 20-30) piezoelectric layers and many (e.g., 20-30) conductive layers.
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公开(公告)号：US11250675B2
公开(公告)日：2022-02-15
申请号：US16992077
申请日：2020-08-12
摘要： A sensor system includes an actuator, an accelerometer coupled with the actuator, a rigid member, a transducer, and one or more processors. The actuator generates motion. The accelerometer outputs an acceleration signal responsive to at least the motion of the actuator. The rigid member extends from a first end coupled with the accelerometer to a second end. The transducer is coupled with the second end of the rigid member. The transducer can be configured to couple with a load, and can output a force signal responsive to at least a portion of the motion of the actuator transmitted to the transducer via the rigid member. The one or more processors determine a mechanical impedance of the load based at least on the acceleration signal and the force signal.
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公开(公告)号：US10771888B1
公开(公告)日：2020-09-08
申请号：US16536604
申请日：2019-08-09
发明人： Tetsuro Oishi , Morteza Khaleghimeybodi , Pablo Francisco Faundez Hoffman , 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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公开(公告)号：US20200304905A1
公开(公告)日：2020-09-24
申请号：US16555058
申请日：2019-08-29
发明人： Tetsuro Oishi , Chuming Zhao , Gelmont Rios
摘要： An audio system includes a speaker configured to emit sound. The speaker is contained in an enclosure, the enclosure forming a front cavity and a rear cavity that are on opposite sides of the speaker. The enclosure includes: at least one output port configured to output a first portion of the sound from the front cavity and at least one rear port configured to output a second portion of the sound from the rear cavity. The second portion of the sound is substantially out of phase with the first portion. The audio system has an equivalent acoustic volume (Vas) greater than ten times a volume of the front cavity and greater than ten times a volume of the rear cavity.
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公开(公告)号：US20230083937A1
公开(公告)日：2023-03-16
申请号：US17474541
申请日：2021-09-14
摘要： Embodiments relate to an audio system configured to provide enhancement of low audio frequencies. The audio system includes a tissue transducer and a speaker coupled to the tissue transducer. The tissue transducer is configured to be coupled to a tissue of a user (e.g., pinna of a user's ear). The speaker includes a diaphragm having a first surface and a second surface that is opposite the first surface. The first surface is configured to generate a first set of airborne acoustic pressure waves, and the second surface is configured to generate a backpressure. The tissue transducer is driven by the backpressure to vibrate the tissue to form a second set of acoustic pressure waves. The first set of airborne acoustic pressure waves and the second set of acoustic pressure waves together form audio content that is presented to the user.
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公开(公告)号：US11405720B2
公开(公告)日：2022-08-02
申请号：US17130290
申请日：2020-12-22
摘要： An audio system comprises an array of transparent piezoelectric transducers on a transparent surface. Each transparent piezoelectric transducer includes one or more piezoelectric layers and one or more conductive layers that are substantially transparent to visible light. A transparent piezoelectric transducer may include, e.g., a first conductive layer, a first piezoelectric layer on the first conductive layer, and a second conductive layer on the first piezoelectric layer. Or in another example, the transparent piezoelectric transducer includes many (e.g., 20-30) piezoelectric layers and many (e.g., 20-30) conductive layers.
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公开(公告)号：US20220078540A1
公开(公告)日：2022-03-10
申请号：US17525182
申请日：2021-11-12
摘要： An in-ear device comprises a transducer section, a front volume section, and a rear volume section. The transducer section includes a frame and piezoelectric actuators coupled to the frame. The piezoelectric actuators are configured to generate an acoustic pressure wave. The transducer section includes a first side and a second side, the second side being opposite the first side. The front volume section is coupled to the first side to form a front cavity, the front volume section including an aperture from which the generated acoustic pressure wave exits the front volume section towards an ear drum of a user. The rear volume section is coupled to the second side to form a rear cavity. The transducer section, the front volume section, and the rear volume section are configured to fit entirely within the ear canal.
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公开(公告)号：US11146891B1
公开(公告)日：2021-10-12
申请号：US16666178
申请日：2019-10-28
摘要： A microelectromechanical system (MEMS) coil assembly is presented herein. In some embodiments, the MEMS coil assembly includes a foldable substrate and a plurality of coil segments. Each coil segment includes a portion of the substrate, two conductors arranged on the portion of the substrate. The substrate can be folded to stack the coil segments on top of each other and to electrically connect first and second conductors of adjacent coil segments. In some other embodiments, the MEMS coil assembly includes a plurality of coil layers stacked onto each other. Each coil layer includes a substrate and a conductor to form a coil. The conductors of adjacent coil layers are connected through a via. The MEMS coil assembly can be arranged between a pair of magnets. An input signal can be applied to the MEMS coil assembly to cause the MEMS coil assembly to move orthogonally relative to the magnets.
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公开(公告)号：US11363395B1
公开(公告)日：2022-06-14
申请号：US17133026
申请日：2020-12-23
发明人： Yuri Toride , Chuming Zhao
摘要： A piezoelectric microelectromechanical systems (MEMS) transducer that can operate as a microphone (e.g., contact microphone) or a speaker is presented herein. The piezoelectric MEMS transducer includes a substrate, a proof mass and folded displacement sensing structures. Each folded displacement sensing structure comprises a continuous beam, a first piezoelectric stress sensor coupled to a first portion of the continuous beam, and a second piezoelectric stress sensor coupled to a second portion of the continuous beam. The first portion of the continuous beam is coupled to a respective portion of the proof mass, and the second portion of the continuous beam is coupled to a respective portion of the substrate. The first and second portions of the continuous beam come together at an acute angle. The first and second piezoelectric stress sensors output stress information responsive to a stress induced in the continuous beam by displacement of the proof mass.
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