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Generation of coloured acoustic noise samples with non-Gaussian distributions

机译:具有非高斯分布的彩色声噪声样本的生成

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摘要

This study proposes a method for generating acoustic noise sequences with different distributions and coloured spectra. The noise samples are obtained by passing a non-Gaussian white noise through a finite impulse response filter. The resulting power spectral density is proportional to 1/f;2;, where ;2; is a positive power-law exponent. The noise samples pattern is determined by the Kurtosis ratio. The proposed generator is evaluated by comparing real and artificial acoustic noises statistics in the time and frequency domains. The results show that the generated coloured sequences achieved the PSD decaying rate and also the non-Gaussian pattern of the real environmental acoustic noises.
机译:这项研究提出了一种生成具有不同分布和彩色频谱的声噪声序列的方法。通过将非高斯白噪声通过有限脉冲响应滤波器来获得噪声样本。所得功率谱密度与1 / f ; 2; 成正比,其中; 2;是一个正幂律指数。噪声样本模式由峰度比率确定。通过比较时域和频域中的真实声噪声和人工声噪声统计信息来评估所提出的发生器。结果表明,所生成的有色序列达到了PSD的衰减率,并且还获得了实际环境声噪声的非高斯模式。

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  • 来源
    《Signal Processing, IET》 |2012年第7期|p.684-688|共5页
  • 作者

    Zao L.; Coelho R.;

  • 作者单位

    Electrical Engineering Department, Military Institute of Engineering (IME), Praca General Tiburcio, 80, Praia Vermelha, Rio de Janeiro 22290-270, Brazil;

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  • 正文语种 eng
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