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首页> 外文期刊>Signal processing >Self-calibrating microphone arrays for speech signal acquisition: A systematic approach
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Self-calibrating microphone arrays for speech signal acquisition: A systematic approach

机译：用于语音信号采集的自校准麦克风阵列：一种系统方法

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摘要

The application of microphone arrays and beamforming techniques for speech acquisition promises significant improvement compared to systems operating with a single microphone. Adaptive beamformers offer a potentially superior performance to fixed beamformers particularly in the case of time varying sound field characteristics or in the case of coherent noise such as interfering speakers, loudspeaker signals, etc. However, for real-world applications adaptive beamformers hold the risk of severe signal degradation. Disturbances such as mismatched microphones, an imprecise steering direction or reverberation due to multi-path propagation may cause an adaptive beamformer to distort the desired signal. Microphone mismatch naturally arises from production tolerances as well as from aging effects in the long run.
机译：与使用单个麦克风操作的系统相比，麦克风阵列和波束成形技术在语音获取中的应用有望显着改善。自适应波束形成器比固定波束形成器具有潜在的优越性能，特别是在时变声场特性或相干噪声（例如干扰扬声器，扬声器信号等）的情况下。但是，在实际应用中，自适应波束形成器存在以下风险：严重的信号衰减。诸如麦克风不匹配，转向方向不精确或由于多径传播引起的混响之类的干扰可能会导致自适应波束形成器使所需信号失真。麦克风的不匹配自然是由生产公差以及长期的老化影响引起的。

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