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US 2019/0200152 A1Published application
Systems and methods for audio scene generation by effecting spatial and temporal control of the vibrations of a panel
AssigneeUniversity of Rochester
InventorMark F. Bocko
Life of this patent
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Abstract
A loudspeaker system composed of a flexible panel with an affixed array of force actuators, a signal processing system, and interface electronic circuits is described. The system described is capable of creating a pattern of standing bending waves at any location on the panel and the instantaneous amplitude, velocity, or acceleration of the standing waves can be controlled by an audio signal to create localized acoustic sources at the selected locations in the plane of the panel.
Claims61
A method of effecting spatial and temporal control of the vibrations of a panel, comprising:
- receiving a shape function and an audio signal;
- determining a band-limited Fourier series representation of the shape function;
- computing one or more modal accelerations from the audio signal and the band-limited Fourier series representation of the shape function;
- computing, using a frequency domain plate-bending mode response, one or more modal forces needed to produce the one or more modal accelerations;
- determining a response associated with a discrete-time filter corresponding to the frequency domain plate bending mode response;
- summing the one or more modal forces to determine a force required at each driver element in a plurality of driver elements;
- performing a multichannel digital to analog conversion and amplification of one or more forces required at each driver element in the plurality of driver elements;
- and
- driving a plurality of amplifiers with the converted and amplified forces required at each driver element in the plurality of driver elements.
6 more elements
A system for spatial and temporal control of the vibrations of a panel, comprising:
- a functional portion of an display (e.g., with backlight, polarizing material layer, and color filter layer);
- an audio layer comprising a plate and a plurality of driver elements (e.g., with a shield layer, a piezoelectric film layer, electrodes, and a cover glass for protection), wherein the function portion of the display is proximate to the audio layer;
- and
- a processor and a memory having instructions stored thereon, wherein execution of the instructions by the processor cause the processor to:
- receive a shape function and an audio signal;
- determine a band-limited Fourier series representation of the shape function;
- compute one or more modal accelerations from the audio signal and the band-limited Fourier series representation of the shape function;
- compute, using a frequency domain plate bending mode response, one or more modal forces needed to produce the one or more modal accelerations;
- determine a response associated with a discrete-time filter corresponding to the frequency domain plate bending mode response;
- sum the one or more modal forces to find one or more forces required at each driver element in a plurality of driver elements;
- perform a multichannel digital-to-analog conversion and amplification of a force required at each driver element in a plurality of driver elements;
- and
- drive a plurality of amplifiers with the converted and amplified forces required at each driver element in the plurality of driver elements.
10 more elements
A method of virtual source generation for the generation of an audio scene by effecting spatial and temporal control of the vibrations of a panel, comprising
- receiving an audio signal;
- receiving one or more distance cues associated with a virtual acoustic source, wherein the virtual acoustic source is representative of an acoustic source behind a panel;
- computing one or more acoustic wave fronts at one or more predetermined locations on the panel;
- computing one or more modal accelerations from the audio signal and one or more distance ques and acoustic wave fronts;
- computing, using a frequency domain plate bending mode response, one or more modal forces needed to produce the one or more modal accelerations;
- determining a response associated with a discrete-time filter corresponding to the frequency domain plate bending mode response;
- summing the one or more modal forces to determine one or more forces required at each driver element in an array of driver element;
- performing a multichannel digital-to-analog conversion and amplification of the force required at each driver element in an array of driver elements;
- and
- driving a plurality of amplifiers with the converted and amplified forces required at each driver element in an array of driver elements.
7 more elements
A system for spatial and temporal control of the vibrations of a panel, comprising:
- a projector;
- a plurality of drive elements mounted to the backside of a panel;
- reflective screen facing the projector;
- a processor and memory having instructions stored thereon, wherein the instructions, when executed by the processor, cause the processor to:
- receive a shape function and an audio signal;
- determine a band-limited Fourier series representation of the shape function;
- compute one or more modal accelerations from the audio signal and the Fourier series representation of the shape function;
- compute, using a frequency domain plate bending mode response, one or more modal forces needed to produce the one or more modal accelerations;
- determine a response associated with a discrete-time filter corresponding to the frequency domain plate bending mode response;
- sum the one or more modal forces to determine a force required at each driver element in a plurality of driver elements;
- perform a multichannel digital to analog conversion and amplification of one or more forces required at each driver element in a plurality of driver elements;
- and
- drive a plurality of amplifiers with the converted and amplified forces required at each driver element in a plurality of driver elements.
10 more elements
Dependencies are inferred from the claim text.