Broadband signal recording for a baffled circular microphone array using circular harmonics decomposition

Min Wang; Xiaochuan Ma; Shefeng Yan; Zhigang Shang

doi:10.1109/ICOSP.2014.7015015

Broadband signal recording for a baffled circular microphone array using circular harmonics decomposition

Min Wang, Xiaochuan Ma, Shefeng Yan, Zhigang Shang

CAS - Institute of Acoustics

Research output: Contribution to conference › Paper › peer-review

Abstract

The relationship between the signals recorded by a circular microphone array (CMA) and the sound pressure distribution is analysed in this paper. By applying circular harmonics (CH) decomposition to the sound pressure, the analytic expression of the sound pressure distribution around a CMA baffled on an infinite-length rigid cylinder is formulated. Signal recording models for both single frequency and broadband signals are also established under unbaffled and baffled cases. Further more, an overlap processing method is employed to alleviate the distortions produced during the segment-divided processing. Computer simulations are conducted to demonstrate the broadband signals recorded by unbaffled and baffled CMAs, and the improved performance of overlap processing.

Original language	English
Pages	292-297
Number of pages	6
DOIs	https://doi.org/10.1109/ICOSP.2014.7015015
Publication status	Published - 2014
Externally published	Yes
Event	2014 12th IEEE International Conference on Signal Processing, ICSP 2014 - Hangzhou, China Duration: 19 Oct 2014 → 23 Oct 2014

Conference

Conference	2014 12th IEEE International Conference on Signal Processing, ICSP 2014
Country/Territory	China
City	Hangzhou
Period	19/10/14 → 23/10/14

Keywords

Baffle
Broadband signal
CH decomposition
CMA
Overlap processing
Sound pressure

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10.1109/ICOSP.2014.7015015

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abstract = "The relationship between the signals recorded by a circular microphone array (CMA) and the sound pressure distribution is analysed in this paper. By applying circular harmonics (CH) decomposition to the sound pressure, the analytic expression of the sound pressure distribution around a CMA baffled on an infinite-length rigid cylinder is formulated. Signal recording models for both single frequency and broadband signals are also established under unbaffled and baffled cases. Further more, an overlap processing method is employed to alleviate the distortions produced during the segment-divided processing. Computer simulations are conducted to demonstrate the broadband signals recorded by unbaffled and baffled CMAs, and the improved performance of overlap processing.",

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AU - Ma, Xiaochuan

AU - Yan, Shefeng

AU - Shang, Zhigang

PY - 2014

Y1 - 2014

N2 - The relationship between the signals recorded by a circular microphone array (CMA) and the sound pressure distribution is analysed in this paper. By applying circular harmonics (CH) decomposition to the sound pressure, the analytic expression of the sound pressure distribution around a CMA baffled on an infinite-length rigid cylinder is formulated. Signal recording models for both single frequency and broadband signals are also established under unbaffled and baffled cases. Further more, an overlap processing method is employed to alleviate the distortions produced during the segment-divided processing. Computer simulations are conducted to demonstrate the broadband signals recorded by unbaffled and baffled CMAs, and the improved performance of overlap processing.

AB - The relationship between the signals recorded by a circular microphone array (CMA) and the sound pressure distribution is analysed in this paper. By applying circular harmonics (CH) decomposition to the sound pressure, the analytic expression of the sound pressure distribution around a CMA baffled on an infinite-length rigid cylinder is formulated. Signal recording models for both single frequency and broadband signals are also established under unbaffled and baffled cases. Further more, an overlap processing method is employed to alleviate the distortions produced during the segment-divided processing. Computer simulations are conducted to demonstrate the broadband signals recorded by unbaffled and baffled CMAs, and the improved performance of overlap processing.

KW - Baffle

KW - Broadband signal

KW - CH decomposition

KW - CMA

KW - Overlap processing

KW - Sound pressure

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M3 - Paper

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T2 - 2014 12th IEEE International Conference on Signal Processing, ICSP 2014

Y2 - 19 October 2014 through 23 October 2014

ER -

Broadband signal recording for a baffled circular microphone array using circular harmonics decomposition

Abstract

Conference

Keywords

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