Sound field estimating method, sound field estimating apparatus, and program
By storing and selecting diagonal matrices of ideal weighting matrices based on scatterer states, the method enhances sound field estimation accuracy and noise reduction, addressing the limitations of conventional techniques.
JP2026014487APending Publication Date: 2026-01-29NIPPON TELEGRAPH & TELEPHONE CORP +1
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Patent Information
- Application Number
- JP2024115596
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2026-01-29
AI Technical Summary
Technical Problem
Conventional sound field estimation techniques do not account for the impact of varying scatterer states, such as number, shape, position, and orientation, leading to inaccuracies in sound field estimation, particularly in the mid-to-high frequency range.
Method used
A method involving the storage of diagonal matrices of ideal weighting matrices from acoustic simulations, selecting the closest matching matrix based on scatterer states, and using it for sound field estimation.
Benefits of technology
Improves sound field estimation accuracy regardless of scatterer states, enhancing performance in mid-to-high frequency ranges and improving noise reduction in spatial active noise control.
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Figure 2026014487000001_ABST
Abstract
To provide a sound field estimation technique for improving the estimation accuracy of sound field estimation regardless of the state of a scatterer.SOLUTION: A sound field estimation method includes a weighting matrix candidate storage step of storing a diagonal matrix of a weighting matrix obtained by calculating a scattering sound field by a scatterer using an acoustic simulation as a weighting matrix candidate for each state of the scatterer, a weighting matrix selection step of acquiring a state of the scatterer in an estimation target region and selecting a weighting matrix candidate corresponding to the scatterer in a state close to the acquired state from two or more weighting matrix candidates respectively corresponding to the scatterer in two or more different states, and a sound field estimation step of estimating a sound field in the estimation target region using the selected weighting matrix candidate.SELECTED DRAWING: Figure 3
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