System and method for generating spatial sound using ultrasound
US9936324B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Apr 4, 2016 |
| Grant date | Apr 3, 2018 |
| Priority date | — |
| Expiry date | Apr 4, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2400/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A novel system and method for spatial sound generation is disclosed. A system and method for generating bodiless mid-air speakers includes the steps of: generating a modulated signal by modulating an ultrasonic carrier signal with an audio signal, determining a phase delay value for each ultrasonic transducer of an array of ultrasonic transducers with respect to one or more focal points, and driving each such ultrasonic transducer with the modulated signal in accordance with the phase delay value determined for each ultrasonic transducer to generate audible sound at the one or more focal points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.