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\u306a\u305c\u30a2\u30f3\u30c1\u30a8\u30a4\u30ea\u30a2\u30b9\u304c\u5fc5\u9808\u306a\u306e\u304b\u3092\u76f4\u611f\u3067\u88dc\u8db3\u3059\u308b\u3002\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u901f\u5ea6\u306e\u534a\u5206\u3092\u8d8a\u3048\u308b\u6210\u5206\u304c\u6b8b\u3063\u3066\u3044\u308b\u3068\u3001\u9ad8\u57df\u304c\u4f4e\u57df\u306b\u5316\u3051\u3066\u3057\u307e\u3044\u3001\u5143\u306b\u623b\u305b\u306a\u3044\u8aa4\u308a\u304c\u5165\u308b\uff08\u6298\u308a\u8fd4\u3057\uff09\u3002\u4f8b\u3048\u30701.5kHz\u3067\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u3057\u30662kHz\u306e\u6b63\u5f26\u6ce2\u3092\u6e2c\u308b\u3068\u3001500Hz\u306e\u5225\u306e\u6ce2\u306b\u898b\u3048\u3066\u3057\u307e\u3046\u3001\u3068\u3044\u3046\u6559\u79d1\u66f8\u7684\u306a\u4f8b\u304c\u3042\u308b\u3002\u3053\u306e\u507d\u306e\u4f4e\u5468\u6ce2\u306f\u5f8c\u51e6\u7406\u3067\u53d6\u308a\u9664\u3051\u306a\u3044\u305f\u3081\u3001\u5165\u308a\u53e3\u3067\u78ba\u5b9f\u306b\u906e\u65ad\u3057\u3066\u304a\u304f\u3053\u3068\u304c\u8981\u70b9\u3067\u3042\u308b\u3002[1][4][3]\n\n\n\n
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A\/D\u5909\u63db\u306e\u5b9f\u88c5\u9762\u306e\u88dc\u8db3\u3068\u3057\u3066\u3001\u30b5\u30f3\u30d7\u30eb\uff06\u30db\u30fc\u30eb\u30c9\u3084\u5185\u90e8\u306e\u5909\u63db\u65b9\u5f0f\uff08\u9010\u6b21\u6bd4\u8f03SAR\u3001\u0394\u03a3\uff08\u30c7\u30eb\u30bf\u30b7\u30b0\u30de\uff09\u306a\u3069\uff09\u306f\u88c5\u7f6e\u8a2d\u8a08\u306b\u95a2\u308f\u308b\u304c\u3001\u30e6\u30fc\u30b6\u76ee\u7dda\u3067\u306f\u300c\u5e2f\u57df\u5236\u9650\u2192\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u2192\u91cf\u5b50\u5316\u2192\u5fc5\u8981\u306a\u3089\u30c7\u30a3\u30b6\u300d\u3068\u3044\u3046\u6d41\u308c\u304c\u5b88\u3089\u308c\u3066\u3044\u308c\u3070\u672c\u8cea\u3092\u62bc\u3055\u3048\u3089\u308c\u308b\u3002\u307e\u305f\u3001\u30aa\u30fc\u30d0\u30fc\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\uff08\u30ca\u30a4\u30ad\u30b9\u30c8\u306e2\u500d\u3092\u5927\u304d\u304f\u4e0a\u56de\u308b\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\uff09\u3092\u884c\u3046\u3068\u3001\u91cf\u5b50\u5316\u30ce\u30a4\u30ba\u304c\u5e83\u5e2f\u57df\u306b\u5206\u6563\u3057\u3001SNR\u3084\u6709\u52b9\u30d3\u30c3\u30c8\u6570\u306e\u5411\u4e0a\u3001\u30a2\u30f3\u30c1\u30a8\u30a4\u30ea\u30a2\u30b9\u30fb\u30d5\u30a3\u30eb\u30bf\u306e\u7de9\u548c\u306a\u3069\u306e\u5229\u70b9\u304c\u5f97\u3089\u308c\u308b\u3053\u3068\u304c\u77e5\u3089\u308c\u3066\u3044\u308b\u3002[9][3][1]\n\n\n\n
\u6700\u5f8c\u306b\u3001\u3088\u304f\u3042\u308b\u4e0d\u5177\u5408\u3068\u56de\u907f\u7b56\u3092\u307e\u3068\u3081\u308b\u30021) \u30a8\u30a4\u30ea\u30a2\u30b7\u30f3\u30b0\u5bfe\u7b56: \u5165\u529b\u524d\u306e\u30a2\u30ca\u30ed\u30b0\u4f4e\u57df\u30d5\u30a3\u30eb\u30bf\u3092\u9069\u5207\u306b\u8a2d\u8a08\u30fb\u8a2d\u5b9a\u3057\u3001\u5bfe\u8c61\u5e2f\u57df\u306b\u898b\u5408\u3046\u5145\u5206\u306a\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u5468\u6ce2\u6570\u3092\u9078\u3076\u30022) \u30af\u30ea\u30c3\u30d7\u56de\u907f: A\/D\u306e\u5165\u529b\u30ec\u30f3\u30b8\u3092\u8d85\u3048\u308b\u3068\u6b6a\u3080\u305f\u3081\u3001\u5165\u529b\u30b2\u30a4\u30f3\u3092\u9069\u6b63\u5316\u3057\u3001\u30d4\u30fc\u30af\u304c\u4e0a\u9650\u306b\u5f53\u305f\u3089\u306a\u3044\u3088\u3046\u76e3\u8996\u3059\u308b\uff08\u30d3\u30c3\u30c8\u6df1\u5ea6\u306b\u95a2\u308f\u3089\u305a\u91cd\u8981\uff09\u30023) \u91cf\u5b50\u5316\u6b6a\u307f\u4f4e\u6e1b: \u30d3\u30c3\u30c8\u6df1\u5ea6\u3092\u4e0b\u3052\u308b\u969b\u306b\u306f\u30c7\u30a3\u30b6\u3092\u9069\u7528\u3057\u3001\u5fc5\u8981\u306a\u3089\u30ce\u30a4\u30ba\u30b7\u30a7\u30fc\u30d4\u30f3\u30b0\u3067\u8074\u611f\u306b\u914d\u616e\u3059\u308b\u30024) \u51e6\u7406\u4f59\u88d5\u306e\u78ba\u4fdd: \u91cd\u3044\u30c7\u30b8\u30bf\u30eb\u51e6\u7406\u3092\u884c\u3046\u5834\u5408\u306f\u3001\u9069\u5ea6\u306a\u9ad8\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u30fb\u9ad8\u30d3\u30c3\u30c8\u3067\u306e\u53d6\u308a\u8fbc\u307f\u3092\u691c\u8a0e\u3059\u308b\u3002\u3053\u306e\u4e00\u9023\u306e\u914d\u616e\u306b\u3088\u3063\u3066\u3001\u30a2\u30ca\u30ed\u30b0\u306e\u6ed1\u3089\u304b\u306a\u6ce2\u3092\u3001\u30c7\u30b8\u30bf\u30eb\u306e\u6570\u5217\u3068\u3057\u3066\u7834\u7dbb\u306a\u304f\u3001\u518d\u5229\u7528\u3057\u3084\u3059\u3044\u54c1\u8cea\u3067\u4fdd\u5b58\u3067\u304d\u308b\u3002[6][2][4][3][12][9]\n\n\n\n[1] http:\/\/www.monolithicpower.com\/en\/learning\/mpscholar\/analog-to-digital-converters\/introduction-to-adcs\/fundamental-concepts<\/p>\n\n\n\n[2] https:\/\/www.izotope.com\/en\/learn\/what-is-dithering-in-audio<\/p>\n\n\n\n[3] https:\/\/en.wikipedia.org\/wiki\/Analog-to-digital_converter<\/p>\n\n\n\n[4] https:\/\/www.electronics-lab.com\/article\/analog-to-digital-conversion-part-1\/<\/p>\n\n\n\n[5] https:\/\/xiengineering.com\/sampling-frequency-audio-aliasing\/<\/p>\n\n\n\n[6] https:\/\/www.masteringbox.com\/learn\/ad-and-da-converters<\/p>\n\n\n\n[7] https:\/\/en.wikipedia.org\/wiki\/Nyquist%E2%80%93Shannon_sampling_theorem<\/p>\n\n\n\n[8] https:\/\/www.dpamicrophones.com\/mic-university\/background-knowledge\/getting-from-a-to-d-and-back-on-digital-conversion\/<\/p>\n\n\n\n[9] https:\/\/www.analog.com\/en\/resources\/analog-dialogue\/articles\/ac-and-dc-data-acquisition-signal-chains-made-easy.html<\/p>\n\n\n\n[10] https:\/\/www.arrow.com\/en\/research-and-events\/articles\/engineering-resource-basics-of-analog-to-digital-converters<\/p>\n\n\n\n[11] https:\/\/www.sageaudio.com\/articles\/what-is-dithering<\/p>\n\n\n\n[12] https:\/\/en.wikipedia.org\/wiki\/Noise_shaping<\/p>\n\n\n\n[13] https:\/\/www.ti.com\/lit\/an\/snoa232\/snoa232.pdf<\/p>\n\n\n\n[14] https:\/\/www.geeksforgeeks.org\/electronics-engineering\/nyquist-sampling-theorem\/<\/p>\n\n\n\n[15] https:\/\/mixingmonster.com\/what-is-dithering-in-audio\/<\/p>\n\n\n\n[16] https:\/\/www.youtube.com\/watch?v=IZJQXlbm2dU<\/p>\n\n\n\n[17] https:\/\/www.youtube.com\/watch?v=yWqrx08UeUs<\/p>\n\n\n\n[18] http:\/\/recherche.ircam.fr\/anasyn\/schwarz\/da\/specenv\/3_1Digital_Signal_Processin.html<\/p>\n\n\n\n[19] https:\/\/www.youtube.com\/watch?v=U2mwXiJqAgA<\/p>\n\n\n\n[20] https:\/\/ph.yamaha.com\/en\/business\/audio\/resources\/self-training\/audio-quality\/05-audio-quality.html<\/p>\n\n\n\n
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