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<p>With growing noise pollution concerns, sound source localization based on microphone array is critical for noise mitigation. However, microphone array installation deviations may degrade sound source localization accuracy. This study analyzes how installation deviations in large-scale microphone arrays affect sound source localization accuracy through simulation. A nested array configuration combining a multi-ring uniform circular array with a multi-arm logarithmic spiral array was designed. This configuration was used to simulate and study stationary sound sources at various frequencies and distances under different radial and spatial installation deviations of the microphones. Results show localization error magnitude grows proportionally with installation deviations. High-frequency and close-range sound sources are significantly affected by installation deviations. Radial deviations minimally affect beamforming maps, whereas spatial deviations cause significant distortion. For high-frequency sound sources, severe distortion of the cloud map occurs when the spatial deviation reaches 0.035&#xa0;m. Deviations in the Z-direction most critically affect localization accuracy, requiring strict installation precision. These insights offer practical guidance for optimizing large-scale microphone array installation in engineering applications.</p>

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Sound source localization errors caused by installation deviations of large-scale microphone arrays

  • 期刊论文

  • 发表日期：

    2025年5月5日

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  • Sirui Tao,
  • Cheng Wei Lee,
  • Wei Ma

摘要

With growing noise pollution concerns, sound source localization based on microphone array is critical for noise mitigation. However, microphone array installation deviations may degrade sound source localization accuracy. This study analyzes how installation deviations in large-scale microphone arrays affect sound source localization accuracy through simulation. A nested array configuration combining a multi-ring uniform circular array with a multi-arm logarithmic spiral array was designed. This configuration was used to simulate and study stationary sound sources at various frequencies and distances under different radial and spatial installation deviations of the microphones. Results show localization error magnitude grows proportionally with installation deviations. High-frequency and close-range sound sources are significantly affected by installation deviations. Radial deviations minimally affect beamforming maps, whereas spatial deviations cause significant distortion. For high-frequency sound sources, severe distortion of the cloud map occurs when the spatial deviation reaches 0.035 m. Deviations in the Z-direction most critically affect localization accuracy, requiring strict installation precision. These insights offer practical guidance for optimizing large-scale microphone array installation in engineering applications.