我们按照附件图中的电路设计音频采集电路。并将采集到的信号存储成WAV文件,发现采集到的音频文件中存在着明显噪声(详情见附件),所以想问下,噪声产生的可能原因有哪些。我们电路该如何改进??模拟信号输入端是否需要特殊设计??有没有可以参考的资料?
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