\u30bc\u30ed\u4ea4\u5dee\u7387\u306f\u3001\u97f3\u306e\u6ce2\u5f62\u304c\u6642\u9593\u3068\u3068\u3082\u306b\u4e0a\u4e0b\u306b\u63fa\u308c\u308b\u3068\u304d\u3001\u300c\u6ce2\u5f62\u304c\u30bc\u30ed\u306e\u7dda\uff08\u57fa\u6e96\u306e0\u30ec\u30d9\u30eb\uff09\u3092\u4f55\u56de\u307e\u305f\u3044\u3060\u304b\u300d\u3092\u6570\u3048\u305f\u6307\u6a19\u3067\u3042\u308b\u3002\u77ed\u3044\u6642\u9593\u3054\u3068\uff08\u30d5\u30ec\u30fc\u30e0\u3054\u3068\uff09\u306b\u3053\u306e\u56de\u6570\u3092\u6570\u3048\u30011\u79d2\u3042\u305f\u308a\u306b\u76f4\u305b\u3070\u300c\u30bc\u30ed\u4ea4\u5dee\u7387\uff08Zero Crossing Rate: ZCR\uff09\u300d\u306b\u306a\u308b\u3002\u76f4\u611f\u7684\u306b\u306f\u3001\u9ad8\u3044\u5468\u6ce2\u6570\u6210\u5206\u3084\u30b6\u30e9\u3064\u3044\u305f\u96d1\u97f3\u304c\u591a\u3044\u3068\u30bc\u30ed\u4ed8\u8fd1\u3092\u983b\u7e41\u306b\u884c\u304d\u6765\u3059\u308b\u305f\u3081ZCR\u306f\u5927\u304d\u304f\u306a\u308a\u3001\u3086\u3063\u304f\u308a\u6ed1\u3089\u304b\u306a\u6b63\u5f26\u6ce2\u306e\u3088\u3046\u306a\u4fe1\u53f7\u3067\u306f\u5c0f\u3055\u304f\u306a\u308b\u3002\u3053\u306e\u6027\u8cea\u306f\u3068\u3066\u3082\u57fa\u672c\u7684\u3060\u304c\u3001\u8efd\u91cf\u30fb\u9ad8\u901f\u306b\u8a08\u7b97\u3067\u304d\u308b\u305f\u3081\u3001\u97f3\u58f0\u3084\u6a5f\u68b0\u97f3\u306e\u524d\u51e6\u7406\u3084\u7c21\u6613\u306a\u7570\u5e38\u691c\u77e5\u3001\u7121\u97f3\u691c\u51fa\u306a\u3069\u3067\u5e83\u304f\u4f7f\u308f\u308c\u3066\u304d\u305f\u3002[1][2][3][4][5][6]\n\n\n\n
\u307e\u305a\u97f3\u58f0\u51e6\u7406\u306e\u4ee3\u8868\u7684\u306a\u4f7f\u3044\u65b9\u306f\u3001\u533a\u9593\u306e\u5224\u5b9a\u3067\u3042\u308b\u3002\u9332\u97f3\u30c7\u30fc\u30bf\u3092\u7d30\u304b\u3044\u6642\u9593\u3067\u533a\u5207\u308a\u3001\u5404\u30d5\u30ec\u30fc\u30e0\u306eZCR\u3068\u30a8\u30cd\u30eb\u30ae\u30fc\uff08\u4fe1\u53f7\u30d1\u30ef\u30fc\uff09\u3092\u898b\u6bd4\u3079\u308b\u3068\u3001\u300c\u58f0\u304c\u5165\u3063\u3066\u3044\u308b\u533a\u9593\u300d\u300c\u7121\u97f3\u307e\u305f\u306f\u96d1\u97f3\u4e2d\u5fc3\u306e\u533a\u9593\u300d\u3092\u81ea\u52d5\u3067\u5206\u3051\u3084\u3059\u304f\u306a\u308b\u3002\u4e00\u822c\u306b\u3001\u7121\u58f0\u97f3\u3084\u6469\u64e6\u97f3\u306e\u3088\u3046\u306b\u9ad8\u5468\u6ce2\u6210\u5206\u304c\u591a\u3044\u90e8\u5206\u306fZCR\u304c\u9ad8\u304f\u3001\u6709\u58f0\u97f3\u306e\u3088\u3046\u306b\u660e\u78ba\u306a\u57fa\u672c\u5468\u6ce2\u6570\u3092\u3082\u3064\u90e8\u5206\u3067\u306fZCR\u304c\u4f4e\u304f\u51fa\u308b\u50be\u5411\u304c\u3042\u308b\u3002\u305d\u306e\u305f\u3081\u3001ZCR\u306b\u3057\u304d\u3044\u5024\u3092\u8a2d\u3051\u3001\u30a8\u30cd\u30eb\u30ae\u30fc\u3068\u7d44\u307f\u5408\u308f\u305b\u308c\u3070\u3001\u97f3\u58f0\u533a\u9593\u691c\u51fa\uff08VAD\uff09\u306e\u8efd\u91cf\u306a\u30d9\u30fc\u30b9\u30e9\u30a4\u30f3\u304c\u7c21\u5358\u306b\u69cb\u6210\u3067\u304d\u308b\u3002\u307e\u305f\u3001\u5b9f\u52d9\u3067\u306f\u30bc\u30ed\u4ed8\u8fd1\u306e\u5fae\u5c0f\u306a\u63fa\u308c\u3092\u8aa4\u30ab\u30a6\u30f3\u30c8\u3057\u306a\u3044\u3088\u3046\u3001\u30bc\u30ed\u306e\u4ee3\u308f\u308a\u306b\u5c0f\u3055\u306a\u30d0\u30a4\u30a2\u30b9\u7bc4\u56f2\u3092\u8a2d\u5b9a\u3057\u3066\u3001\u305d\u306e\u7bc4\u56f2\u5185\u306e\u4ea4\u5dee\u306f\u6570\u3048\u306a\u3044\u5de5\u592b\u3092\u5165\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u3002[2][3][4][7][1]\n\n\n\n
\u6b21\u306b\u3001\u6a5f\u68b0\u97f3\u30fb\u8a2d\u5099\u8a3a\u65ad\u3078\u306e\u5fdc\u7528\u3067\u3042\u308b\u3002ZCR\u306f\u300c\u97f3\u306e\u7c97\u3055\u300d\u300c\u9ad8\u5468\u6ce2\u306e\u591a\u3055\u300d\u306b\u654f\u611f\u306a\u305f\u3081\u3001\u30e2\u30fc\u30bf\u3084\u30d5\u30a1\u30f3\u306e\u904b\u8ee2\u97f3\u304c\u666e\u6bb5\u3068\u9055\u3046\u9818\u57df\u3078\u79fb\u3063\u305f\u304b\u3069\u3046\u304b\u3092\u3001\u7c21\u5358\u306a\u5148\u884c\u6307\u6a19\u3068\u3057\u3066\u6349\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u4f8b\u3048\u3070\u3001\u3042\u308b\u7814\u7a76\u3067\u306f\u30e2\u30fc\u30bf\u306e\u904b\u8ee2\u72b6\u614b\u3054\u3068\u306bZCR\u306e\u5e73\u5747\u5024\u304c\u7570\u306a\u308b\u5e2f\u306b\u5206\u304b\u308c\u308b\u3053\u3068\u304c\u793a\u3055\u308c\u3001\u904e\u96fb\u5727\u3001\u4f4e\u96fb\u5727\u3001\u76f8\u6b20\u76f8\u306a\u3069\u306e\u72b6\u614b\u3067ZCR\u306e\u4ee3\u8868\u5024\u304c\u7cfb\u7d71\u7684\u306b\u9055\u3046\u7bc4\u56f2\u3092\u53d6\u308b\u3053\u3068\u304c\u5831\u544a\u3055\u308c\u3066\u3044\u308b\u3002\u3053\u306e\u3088\u3046\u306b\u3001ZCR\u306e\u5e73\u5747\u3084\u5206\u5e03\u3092\u76e3\u8996\u3057\u3001\u6b63\u5e38\u6642\u306e\u30ec\u30f3\u30b8\u3092\u5916\u308c\u305f\u3089\u30a2\u30e9\u30fc\u30c8\u3068\u3059\u308b\u30b7\u30f3\u30d7\u30eb\u306a\u76e3\u8996\u306f\u3001\u6f14\u7b97\u91cf\u304c\u5c0f\u3055\u304f\u7d44\u307f\u8fbc\u307f\u3082\u3057\u3084\u3059\u3044\u5229\u70b9\u304c\u3042\u308b\u3002\u4ed6\u65b9\u3067\u3001ZCR\u306f\u5468\u6ce2\u6570\u69cb\u6210\u306b\u4f9d\u5b58\u3057\u3084\u3059\u304f\u3001\u30d1\u30ef\u30fc\u30ec\u30d9\u30eb\u306b\u306f\u6bd4\u8f03\u7684\u9811\u5065\u3060\u304c\u3001\u74b0\u5883\u96d1\u97f3\u306e\u5f71\u97ff\u306f\u53d7\u3051\u3084\u3059\u3044\u6307\u6a19\u3067\u3082\u3042\u308b\u305f\u3081\u3001\u5c02\u7528\u306e\u524d\u51e6\u7406\u3084\u4ed6\u7279\u5fb4\u3068\u306e\u4f75\u7528\u304c\u671b\u307e\u3057\u3044\u3002[7][6]\n\n\n\n
ZCR\u306f\u3001\u3088\u308a\u53e4\u5178\u7684\u306a\u6545\u969c\u691c\u77e5\u3067\u3082\u6d3b\u7528\u3055\u308c\u3066\u304d\u305f\u3002\u30bc\u30ed\u4ea4\u5dee\u7387\u305d\u306e\u3082\u306e\uff08Z1\uff09\u3068\u30011\u968e\u5dee\u5206\u4fe1\u53f7\u306e\u30bc\u30ed\u4ea4\u5dee\u7387\uff08Z2\uff09\u306e\u7d44\u3067\u4fe1\u53f7\u30922\u6b21\u5143\u306b\u914d\u7f6e\u3059\u308b\u3068\u3001\u6b63\u5e38\u3068\u7570\u5e38\u304c\u7570\u306a\u308b\u30af\u30e9\u30b9\u30bf\u3068\u3057\u3066\u5206\u304b\u308c\u308b\u30b1\u30fc\u30b9\u304c\u793a\u3055\u308c\u3066\u3044\u308b\u3002\u3053\u306e\uff08Z1, Z2\uff09\u7a7a\u9593\u3067\u306e\u5206\u96e2\u306f\u3001\u7cfb\u306e\u652f\u914d\u7684\u306a\u5171\u632f\uff08\u6975\uff09\u306b\u5bfe\u3059\u308b\u611f\u5ea6\u304c\u3042\u308b\u3068\u5831\u544a\u3055\u308c\u3001\u826f\u5426\u5224\u5b9a\u306e\u5224\u5225\u6307\u6a19\u3068\u3057\u3066\u6709\u52b9\u6027\u304c\u793a\u3055\u308c\u305f\u3002\u6642\u9593\u9818\u57df\u3060\u3051\u3067\u5b8c\u7d50\u3057\u3001\u8a08\u7b97\u304c\u8efd\u3044\u3053\u3068\u304b\u3089\u3001\u30aa\u30f3\u30e9\u30a4\u30f3\u306e\u4e00\u6b21\u30b9\u30af\u30ea\u30fc\u30cb\u30f3\u30b0\u306b\u5411\u304f\u306e\u304cZCR\u306e\u5f37\u307f\u3067\u3042\u308b\u3002[8]\n\n\n\n
\u71c3\u713c\u3084\u69cb\u9020\u306e\u5206\u91ce\u3067\u3082\u3001ZCR\u306f\u975e\u5b9a\u5e38\u306e\u4e0d\u5b89\u5b9a\u5316\u3084\u7570\u5e38\u306e\u5146\u3057\u306b\u53cd\u5fdc\u3057\u3084\u3059\u3044\u7c21\u6613\u6307\u6a19\u3068\u3057\u3066\u691c\u8a0e\u3055\u308c\u3066\u3044\u308b\u3002\u305f\u3068\u3048\u3070\u71c3\u713c\u7cfb\u3067\u306f\u3001\u71c3\u713c\u4e0d\u5b89\u5b9a\u6642\u306e\u5727\u529b\u3084\u9a12\u97f3\u306e\u6ce2\u5f62\u304c\u5fae\u7d30\u306b\u632f\u52d5\u3059\u308b\u305f\u3081\u3001ZCR\u3092\u7528\u3044\u305f\u8a3a\u65ad\u304c\u6709\u52b9\u306a\u30b1\u30fc\u30b9\u304c\u5831\u544a\u3055\u308c\u3066\u3044\u308b\u3002\u307e\u305f\u3001\u30c7\u30a3\u30fc\u30bc\u30eb\u6a5f\u95a2\u7b49\u306e\u632f\u52d5\u4fe1\u53f7\u306b\u5bfe\u3057\u3001\u30bc\u30ed\u4ea4\u5dee\u306e\u6642\u9593\u60c5\u5831\u3092\u30b5\u30a4\u30f3\u30c1\u30e3\uff08\u7f72\u540d\uff09\u3068\u3057\u3066\u5229\u7528\u3059\u308b\u6642\u9593\u9818\u57df\u6cd5\u306e\u9069\u7528\u3082\u793a\u3055\u308c\u3066\u304a\u308a\u3001\u30d5\u30fc\u30ea\u30a8\u5909\u63db\u306b\u983c\u3089\u305a\u6642\u7cfb\u5217\u306e\u5fae\u7d30\u306a\u5909\u5316\u3092\u6349\u3048\u308b\u30a2\u30d7\u30ed\u30fc\u30c1\u306e\u4e00\u3064\u3068\u3057\u3066\u4f4d\u7f6e\u3065\u3051\u3089\u308c\u3066\u3044\u308b\u3002[9][10]\n\n\n\n
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