Sound field construction method and device, active noise reduction method and electronic device
By using singular value decomposition and adaptive algorithms, sound pressure levels are collected in real time using a small number of microphones to construct a complex vector of basis coefficients for a three-dimensional sound field. This solves the problems of high microphone cost and insufficient real-time performance in three-dimensional sound fields, and achieves accurate sound field reconstruction and real-time tracking of sound signal amplitude fluctuations.
CN115835118BActive Publication Date: 2026-06-26安声(重庆)电子科技有限公司
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 安声(重庆)电子科技有限公司
- Filing Date
- 2022-11-02
- Publication Date
- 2026-06-26
Smart Images
Figure CN115835118B_ABST
Abstract
The application provides a sound field construction method and device and an active noise reduction method. The sound field construction method comprises the following steps: determining a complex sound pressure corresponding to each sound pressure value in a plurality of sound pressure values based on a plurality of sound pressure values collected in real time by a plurality of observation points; obtaining a basis coefficient complex vector corresponding to the plurality of observation points by a singular value matrix based on the complex sound pressure corresponding to each sound pressure value, wherein the singular value matrix is obtained by singular value decomposition of a sound field basis matrix corresponding to the plurality of observation points; and realizing real-time construction of a three-dimensional sound field according to the basis coefficient complex vector. The technical scheme of the application can accurately restore the global sound distribution of the entire three-dimensional sound field in real time.
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