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公开(公告)号：US20240290314A1
公开(公告)日：2024-08-29
申请号：US18113341
申请日：2023-02-23
发明人： Taehwa Lee , Xiaopeng Li , Ziqi Yu
IPC分类号： G10K11/172
CPC分类号： G10K11/172 , G01J1/4204
摘要： A light-activated acoustic resonator and associated methods are described herein. One embodiment measures the level of ambient light in the environment of the light-activated acoustic resonator; causes a moveable member of an electromagnet disposed within a Helmholtz resonator of the light-activated acoustic resonator to be in an extended position that places the Helmholtz resonator in a first acoustic state, when the level of ambient light is less than a predetermined amount; and causes the moveable member to be in a retracted position that places the Helmholtz resonator in a second acoustic state different from the first acoustic state, when the level of ambient light is at least the predetermined amount.
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2.发明公开公开(公告)号：US20240219078A1
公开(公告)日：2024-07-04
申请号：US18148094
申请日：2022-12-29
发明人： Ziqi Yu , Xiaopeng Li , Taehwa Lee
摘要： A thermal diode includes: a dielectric enclosure having a top surface, a bottom surface, a first side, and a second side; a first Weyl semimetal nanoparticle disposed on the first side; a second Weyl semimetal nanoparticle disposed on the second side; a nanograting disposed on the bottom surface; and a voltage source configured to provide a voltage bias to the nanograting to suppress surface waves from the first Weyl semimetal nanoparticle to the second Weyl semimetal nanoparticle and to modify surface waves from the second Weyl semimetal nanoparticle to the first Weyl semimetal nanoparticle.
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公开(公告)号：US20230199379A1
公开(公告)日：2023-06-22
申请号：US17557934
申请日：2021-12-21
发明人： Ziqi Yu , Xiaopeng Li , Taehwa Lee
IPC分类号： H04R1/40 , G10K11/172 , H04R3/00
CPC分类号： H04R1/406 , G10K11/172 , H04R3/005 , H04S2400/15
摘要： Systems and methods for determining the incident angle of an acoustic wave are presented herein. One embodiment receives an acoustic wave at N transducers, where N is a natural number greater than or equal to 2; solves a set of N coupled differential equations modeling a set of N virtual coupled acoustic resonators using N coupled analog circuits, wherein each of the N coupled analog circuits receives an output signal from a unique one of the N transducers and outputs a voltage signal; and analyzes the N voltage signals output by the N coupled analog circuits to produce an estimate of the incident angle of the acoustic wave.
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公开(公告)号：US11671747B2
公开(公告)日：2023-06-06
申请号：US17180179
申请日：2021-02-19
发明人： Xiaopeng Li , Taehwa Lee , Hideo Iizuka
摘要： A system can improve the performance of an electroacoustic absorber. The system includes a loudspeaker and an absorber operatively positioned relative to the loudspeaker. The absorber can be configured to absorb sound waves. A control circuit can be operatively connected to the loudspeaker. The control circuit can be configured to tune the resonance of the loudspeaker and therefore cause one or more acoustic characteristics, such as acoustic impedance, of the loudspeaker to be adjusted.
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公开(公告)号：US20230167877A1
公开(公告)日：2023-06-01
申请号：US17536582
申请日：2021-11-29
发明人： Xiaopeng Li , Ziqi Yu , Taehwa Lee
CPC分类号： F16F15/04 , F16F7/1005
摘要： Described are systems for absorbing flexural waves acting on a structure. In one example, the system includes a first resonator connected to a structure at a first location and a second resonator connected to the structure at a second location. The distance between the first location and the second location is based on a frequency of a flexural wave acting upon the structure and an orientation of the first resonator and the second resonator with respect to each other.
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公开(公告)号：US20220190231A1
公开(公告)日：2022-06-16
申请号：US17205426
申请日：2021-03-18
发明人： Xiaopeng Li , Taehwa Lee , Hideo Iizuka , Danil V. Prokhorov
IPC分类号： H01L41/113 , H01L41/053
摘要： A system and related method can self-adaptively absorb a flexural wave acting on a beam. The method includes the steps of receiving an input signal representing a frequency response of a flexural wave acting on the beam, determining a spring constant for absorbing the flexural wave based on the input signal, a damping value of a damper acting on the beam, and a mass value of a mass acting on the beam, and applying a spring constant voltage based on the spring constant to a piezoelectric device connected to the beam. The piezoelectric device has a variable spring value that varies based on the voltage applied to the piezoelectric device. The piezoelectric device's variable spring value is approximately equal to the spring constant value when the spring constant voltage is applied to the piezoelectric device.
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公开(公告)号：US20240280426A1
公开(公告)日：2024-08-22
申请号：US18133076
申请日：2023-04-11
发明人： Xiaopeng Li , Taehwa Lee , Ziqi Yu , Yuyang Song
CPC分类号： G01L9/08 , G01L9/0022 , G01L9/06
摘要： Systems described herein relate to sensing pressure. In one arrangement, a pressure sensor is disclosed. The pressure sensor includes a circuit including a resistor, an inductor, and a capacitor. The circuit generates an electrical resonance. The resistor is an elastomer having a resistance and connected to an outer surface of an inflatable. The pressure sensor also includes a resonator connected to the circuit. The resonator generates a mechanical resonance coupling with the electrical resonance to create a detuning frequency having a sublinear dependence on the resistance of the elastomer. A pressure of the inflatable correlates with the detuning frequency.
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公开(公告)号：US12067965B2
公开(公告)日：2024-08-20
申请号：US17591138
申请日：2022-02-02
发明人： Taehwa Lee , Xiaopeng Li , Ziqi Yu
IPC分类号： G10K11/35
CPC分类号： G10K11/357
摘要： A device for superscattering a target acoustic wave may include a body having an outer surface, at least one resonator being defined within the body and extending to an opening defined within the outer surface and configured to cause the superscattering of the target acoustic wave impinging upon the body, and a motor connected to the body and configured to selectively rotate the body.
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公开(公告)号：US20230392527A1
公开(公告)日：2023-12-07
申请号：US17829969
申请日：2022-06-01
发明人： Taehwa Lee , Xiaopeng Li , Ziqi Yu
IPC分类号： F01N1/02 , G10K11/172 , G10K11/16
CPC分类号： F01N1/023 , G10K11/172 , G10K11/161
摘要： A duct includes a duct body defining an inlet, an outlet, and a channel connecting the inlet and the outlet. The duct body also defines an upstream resonator. The upstream resonator includes an upstream annular cavity external to the channel and an annular perforated plate coplanar with the upstream annular cavity. The duct body further defines a downstream resonator. The downstream resonator includes a downstream annular cavity external to the channel and an annular neck coplanar with the downstream annular cavity.
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公开(公告)号：US11812219B2
公开(公告)日：2023-11-07
申请号：US17384125
申请日：2021-07-23
发明人： Xiaopeng Li , Ziqi Yu , Jae Seung Lee , Danil V. Prokhorov , Taehwa Lee
CPC分类号： H04R1/288 , H04R1/2892 , H04R1/30 , H04R3/02 , H04R9/06
摘要： Embodiments for one-way sound absorbing systems are described herein. In one example, a sound absorbing system includes a waveguide having open ends for receiving an incoming acoustic wave and wall portions defining a first port and a second port. A first electroacoustic absorber is mounted to the first port and is electrically connected to a shunting circuit, while a second electroacoustic absorber is mounted to the second port and is electrically connected to an open circuit. The sound absorption of the system is directional dependent.
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