信噪比
信噪比（英语：Signal-to-noise ratio，缩写为SNR或S/N）是科学搭工程中所用个一种度量，用于比较所需信号个强度搭背景噪声个强度。渠个定义为信号功率搭噪声功率个比率，以分贝（dB）为单位表示。
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