2021 IEEE International Conference on Acoustics, Speech and Signal Processing

6-11 June 2021 • Toronto, Ontario, Canada

Extracting Knowledge from Information

2021 IEEE International Conference on Acoustics, Speech and Signal Processing

6-11 June 2021 • Toronto, Ontario, Canada

Extracting Knowledge from Information

Technical Program

Paper Detail

Paper IDSAM-5.2
Paper Title CLOSE-TALKING RECORDING WITH PLANARLY DISTRIBUTED MICROPHONES
Authors Takuma Okamoto, National Institute of Information and Communications Technology, Japan
SessionSAM-5: Microphone Array Signal Processing
LocationGather.Town
Session Time:Thursday, 10 June, 14:00 - 14:45
Presentation Time:Thursday, 10 June, 14:00 - 14:45
Presentation Poster
Topic Sensor Array and Multichannel Signal Processing: [SAM-MAPR] Microphone array processing
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Virtual Presentation  Click here to watch in the Virtual Conference
Abstract This paper provides a close-talking recording method with planarly distributed microphones based on sound pressure interpolation. In the proposed method, sound pressures recorded by microphones located close to the center of multiple co-centered circular microphone arrays are interpolated by sound pressures recorded by the arrays based on multiple 2D cylindrical harmonic analyses. If sound sources are outside the spherical boundary with the maximum radius of the arrays, the interpolation is completed. On the other hand, if sound sources are inside the spherical boundary, the interpolation is not completed in principle. By using the principle, close-talking recording can be realized as the residual response between the recorded and interpolated sound pressures. The recording radial sensibility can be controlled by changing the maximum radius of the arrays. By introducing kernel ridge regression-based sound field interpolation method, the proposed approach can be extended to the method with planarly distributed microphones. The results of computer simulations indicate the effectiveness of the proposed close-talking recording methods.