【摘要】：聲音分析技術(shù)已成為研究動物行為、動物福利的一種重要工具,蛋雞聲音可用來評價其健康或福利狀況,然而規(guī)�；半u舍中存在較多風(fēng)機(jī)噪聲等聲源干擾,這對準(zhǔn)確識別蛋雞發(fā)聲有很大影響。本文以海蘭褐蛋雞為例,預(yù)處理獲取的聲音信號,以減少風(fēng)機(jī)噪聲的干擾。利用數(shù)字化聲音采集平臺采集不同類型的蛋雞發(fā)聲和風(fēng)機(jī)噪聲音頻,采用Lab VIEW軟件進(jìn)行聲音信號處理并分析蛋雞聲音和風(fēng)機(jī)噪聲的時頻特征。同時,對比分析不同去噪方法(IIR濾波器去噪、小波閾值去噪和改進(jìn)譜減法去噪)在去除風(fēng)機(jī)噪聲方面的效果。結(jié)果表明,在信噪比為-8~20 d B聲音環(huán)境下,改進(jìn)譜減法均方根誤差最小(0.03~0.38),算法運(yùn)行耗時最短(6~7 ms),在實(shí)際應(yīng)用中去噪效果較好,可為規(guī)�；半u舍中風(fēng)機(jī)噪聲環(huán)境下的蛋雞聲音信號處理和分析提供參考。
[Abstract]:Sound analysis technology has become an important tool for the study of animal behavior and animal welfare. The sound of laying hen can be used to evaluate its health or welfare status. However, there are many noise sources such as fan noise in the large chicken house, which has a great influence on the accurate identification of the sound of laying hens. The sound signal is used to reduce the noise of the fan. Using the digital sound acquisition platform to collect the sound of different types of laying hens and the noise and audio of the fan, Lab VIEW software is used to carry out the sound signal processing and analyze the time frequency characteristics of the sound and fan noise. At the same time, the different denoising methods (IIR filter denoising, wavelet threshold value) are compared and analyzed. Noise and improved spectral subtraction denoising effect in removing fan noise. The results show that, under the noise ratio of -8~20 D B, the improved spectral subtraction mean square root error is minimal (0.03~0.38), the algorithm running time is shortest (6~7 MS), and the effect of noise removal is better in practical application, and it can be the sound of the egg noise under the noise environment of the large-scale egg chicken house. Signal processing and analysis provide reference.
【作者單位】： 中國農(nóng)業(yè)大學(xué)水利與土木工程學(xué)院;
【基金】：國家重點(diǎn)研發(fā)計劃項(xiàng)目(2016YFD0700204)
【分類號】：S831;TN912.3

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