\u9577\u3044\u9332\u97f3\u3084\u9023\u7d9a\u3059\u308b\u30bb\u30f3\u30b5\u30fc\u4fe1\u53f7\u3092\u305d\u306e\u307e\u307e\u4e00\u5ea6\u306b\u89e3\u6790\u3059\u308b\u3068\u3001\u6642\u9593\u3054\u3068\u306e\u5909\u5316\u304c\u5e73\u5747\u3055\u308c\u3066\u3057\u307e\u3044\u3001\u5909\u5316\u306e\u77ac\u9593\u3084\u77ed\u3044\u30a4\u30d9\u30f3\u30c8\u3092\u898b\u843d\u3068\u3057\u3084\u3059\u3044\u3002\u305d\u3053\u3067\u7528\u3044\u308b\u57fa\u672c\u304c\u300c\u30a6\u30a3\u30f3\u30c9\u30a6\u51e6\u7406\u306b\u3088\u308b\u5206\u5272\u300d\u3067\u3042\u308b\u3002\u3053\u308c\u306f\u3001\u4fe1\u53f7\u3092\u77ed\u3044\u6642\u9593\u306e\u304b\u305f\u307e\u308a\uff08\u30d5\u30ec\u30fc\u30e0\uff09\u306b\u5206\u3051\u3001\u5404\u30d5\u30ec\u30fc\u30e0\u3054\u3068\u306b\u89e3\u6790\u3059\u308b\u3084\u308a\u65b9\u3067\u3001\u77ed\u6642\u9593\u30d5\u30fc\u30ea\u30a8\u5909\u63db\uff08STFT\uff09\u3084\u30b9\u30da\u30af\u30c8\u30ed\u30b0\u30e9\u30e0\u306a\u3069\u591a\u304f\u306e\u624b\u6cd5\u306e\u571f\u53f0\u306b\u306a\u3063\u3066\u3044\u308b\u3002\u30d5\u30ec\u30fc\u30e0\u306e\u4f5c\u308a\u65b9\u306b\u306f\u3001\u9577\u3055\uff08\u4f55\u30df\u30ea\u79d2\u3092\u3072\u3068\u304b\u305f\u307e\u308a\u306b\u3059\u308b\u304b\uff09\u3001\u305a\u3089\u3057\u91cf\uff08\u3069\u308c\u3060\u3051\u91cd\u306d\u308b\u304b\uff1d\u30aa\u30fc\u30d0\u30fc\u30e9\u30c3\u30d7\uff09\u3001\u305d\u3057\u3066\u7aef\u3092\u6ed1\u3089\u304b\u306b\u3059\u308b\u7a93\u95a2\u6570\u306e3\u3064\u3092\u8a2d\u8a08\u3059\u308b\u30dd\u30a4\u30f3\u30c8\u304c\u3042\u308b\u3002[1][2][3]\n\n\n\n
\u307e\u305a\u72d9\u3044\u3092\u76f4\u611f\u3067\u62bc\u3055\u3048\u308b\u3002\u5206\u5272\u306e\u76ee\u7684\u306f\u300c\u3044\u3064\u30fb\u3069\u306e\u304f\u3089\u3044\u5909\u308f\u3063\u305f\u304b\u300d\u3092\u9003\u3055\u306a\u3044\u305f\u3081\u306e\u6642\u9593\u5206\u89e3\u80fd\u3092\u78ba\u4fdd\u3057\u3064\u3064\u3001\u305d\u306e\u533a\u9593\u5185\u3067\u5468\u6ce2\u6570\u6210\u5206\u3092\u5b89\u5b9a\u3057\u3066\u8aad\u3081\u308b\u5468\u6ce2\u6570\u5206\u89e3\u80fd\u3082\u4fdd\u3064\u3053\u3068\u306b\u3042\u308b\u3002\u30d5\u30ec\u30fc\u30e0\u3092\u9577\u304f\u3059\u308c\u3070\u5468\u6ce2\u6570\u306e\u898b\u5206\u3051\u306f\u7d30\u304b\u304f\uff08\u5468\u6ce2\u6570\u5206\u89e3\u80fd\u304c\u9ad8\u304f\uff09\u306a\u308b\u304c\u3001\u5909\u5316\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u304c\u307c\u3084\u3051\u308b\u3002\u77ed\u304f\u3059\u308c\u3070\u5909\u5316\u306e\u77ac\u9593\u306b\u654f\u611f\uff08\u6642\u9593\u5206\u89e3\u80fd\u304c\u9ad8\u3044\uff09\u306b\u306a\u308b\u304c\u3001\u5468\u6ce2\u6570\u306f\u7c97\u304f\u306a\u308b\u3002\u3053\u308c\u306fSTFT\u306e\u57fa\u672c\u7684\u306a\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u3067\u3042\u308a\u3001\u7a93\u9577\u3068\u305a\u3089\u3057\u91cf\uff08\u30db\u30c3\u30d7\uff09\u306e\u8a2d\u5b9a\u304c\u7d50\u679c\u306e\u898b\u3048\u65b9\u3092\u6c7a\u3081\u308b\u3002[2][4][1]\n\n\n\n
\u5206\u5272\u306e\u624b\u9806\u306f\u30b7\u30f3\u30d7\u30eb\u3060\u30021) \u5168\u4fe1\u53f7\u304b\u3089\u9577\u3055N\u30b5\u30f3\u30d7\u30eb\u306e\u533a\u9593\u3092\u5207\u308a\u51fa\u3059\u30022) \u5207\u308a\u51fa\u3057\u7aef\u3067\u306e\u6bb5\u5dee\u304c\u5468\u6ce2\u6570\u5074\u306b\u300c\u306b\u3058\u307f\u300d\u3092\u4f5c\u3089\u306a\u3044\u3088\u3046\u3001\u7a93\u95a2\u6570\u3092\u639b\u3051\u3066\u4e21\u7aef\u3092\u306a\u3081\u3089\u304b\u306b\u3059\u308b\u30023) \u89e3\u6790\uff08\u305f\u3068\u3048\u3070FFT\uff09\u3092\u5b9f\u884c\u3059\u308b\u30024) \u6b21\u306e\u533a\u9593\u3078\u30db\u30c3\u30d7\u30b5\u30a4\u30baH\u3060\u3051\u305a\u3089\u3057\u3001\u91cd\u306d\u306a\u304c\u3089\u540c\u3058\u51e6\u7406\u3092\u7e70\u308a\u8fd4\u3059\u3002\u3053\u306e\u3068\u304d\u3001H\u3092\u5c0f\u3055\u304f\uff08\u9ad8\u30aa\u30fc\u30d0\u30fc\u30e9\u30c3\u30d7\uff09\u3059\u308b\u3068\u6642\u9593\u65b9\u5411\u306e\u60c5\u5831\u304c\u5bc6\u306b\u306a\u308a\u6ed1\u3089\u304b\u3060\u304c\u8a08\u7b97\u91cf\u304c\u5897\u3048\u3001H\u3092\u5927\u304d\u304f\uff08\u4f4e\u30aa\u30fc\u30d0\u30fc\u30e9\u30c3\u30d7\uff09\u3059\u308b\u3068\u8efd\u304f\u306a\u308b\u4ee3\u308f\u308a\u306b\u7c97\u304f\u306a\u308b\u3002[5][3][1][2]\n\n\n\n
\u7a93\u95a2\u6570\u306f\u300c\u7aef\u306e\u51e6\u7406\u300d\u306e\u8981\u3067\u3001\u4ee3\u8868\u7684\u306a\u3082\u306e\u306b\u30cf\u30f3\uff08Hann\uff09\u3001\u30cf\u30df\u30f3\u30b0\u3001\u30d6\u30e9\u30c3\u30af\u30de\u30f3\u3001\u30d6\u30e9\u30c3\u30af\u30de\u30f3\u30fb\u30cf\u30ea\u30b9\u3001\u30d5\u30e9\u30c3\u30c8\u30c8\u30c3\u30d7\u306a\u3069\u304c\u3042\u308b\u3002\u7a93\u3092\u639b\u3051\u308b\u3068\u30b9\u30da\u30af\u30c8\u30eb\u306e\u4e3b\u30d4\u30fc\u30af\uff08\u30e1\u30a4\u30f3\u30ed\u30fc\u30d6\uff09\u304c\u3084\u3084\u5e83\u304f\u306a\u308b\u4e00\u65b9\u3001\u5468\u308a\u306e\u6f0f\u308c\uff08\u30b5\u30a4\u30c9\u30ed\u30fc\u30d6\uff09\u304c\u4f4e\u304f\u6291\u3048\u3089\u308c\u308b\u305f\u3081\u3001\u96a3\u63a5\u5e2f\u57df\u3078\u306e\u306b\u3058\u307f\u3092\u6e1b\u3089\u305b\u308b\u3002\u30cf\u30f3\uff0f\u30cf\u30df\u30f3\u30b0\u306f\u4e2d\u5eb8\u3067\u6271\u3044\u3084\u3059\u304f\u3001\u30d6\u30e9\u30c3\u30af\u30de\u30f3\u3084\u30d6\u30e9\u30c3\u30af\u30de\u30f3\u30fb\u30cf\u30ea\u30b9\u306f\u30b5\u30a4\u30c9\u30ed\u30fc\u30d6\u3092\u3088\u308a\u4f4e\u304f\u6291\u3048\u305f\u3044\u3068\u304d\u306b\u6709\u52b9\u3060\u304c\u30e1\u30a4\u30f3\u30ed\u30fc\u30d6\u306f\u5e83\u304c\u308b\u3002\u76ee\u7684\u306b\u5fdc\u3058\u3066\u300c\u89e3\u50cf\u5ea6\uff08\u30d4\u30fc\u30af\u306e\u7d30\u3055\uff09\u300d\u3068\u300c\u306b\u3058\u307f\u306e\u5c11\u306a\u3055\uff08\u30b5\u30a4\u30c9\u30ed\u30fc\u30d6\u4f4e\u3055\uff09\u300d\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u9078\u3076\u306e\u304c\u5b9a\u77f3\u3067\u3001\u307e\u3068\u3081\u8868\u3067\u3082\u30cf\u30f3\u306f\u30b5\u30a4\u30c9\u30ed\u30fc\u30d6\u7d04-31dB\u3001\u30cf\u30df\u30f3\u30b0\u7d04-42dB\u3001\u30d6\u30e9\u30c3\u30af\u30de\u30f3\u7d04-58dB\u3001\u30d6\u30e9\u30c3\u30af\u30de\u30f3\u30fb\u30cf\u30ea\u30b9\u7d04-90dB\u3068\u3044\u3063\u305f\u76ee\u5b89\u304c\u793a\u3055\u308c\u3066\u3044\u308b\u3002[6][7][2]\n\n\n\n
\u5b9f\u52d9\u3067\u306e\u8a2d\u8a08\u6307\u91dd\u3092\u307e\u3068\u3081\u308b\u3002- \u7a93\u9577N\u306f\u3001\u898b\u305f\u3044\u6700\u5c0f\u306e\u5468\u6ce2\u6570\u5dee\u0394f\u306b\u5bfe\u3057\u3066\u3001\u304a\u304a\u3080\u306d\u0394f\u2248fs\/N\uff08fs\u306f\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u5468\u6ce2\u6570\uff09\u3068\u306a\u308b\u305f\u3081\u3001\u5fc5\u8981\u306a\u5206\u89e3\u80fd\u304b\u3089\u9006\u7b97\u3057\u3066\u9078\u3076\uff08\u305f\u3068\u3048\u3070\u0394f=1Hz\u304c\u5fc5\u8981\u3067fs=1,000Hz\u306a\u3089N\u22481,000\uff09\u3002\u4e00\u65b9\u3001\u6642\u9593\u306e\u5909\u5316\u3092\u9003\u3057\u305f\u304f\u306a\u3044\u5834\u5408\u306f\u3001\u30a4\u30d9\u30f3\u30c8\u306e\u6642\u9593\u5e45\u3088\u308a\u77ed\u3081\u306e\u7a93\u3092\u9078\u3076\u3002\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u306f\u907f\u3051\u3089\u308c\u306a\u3044\u306e\u3067\u3001\u7528\u9014\u306b\u5408\u308f\u305b\u3066\u512a\u5148\u5ea6\u3092\u6c7a\u3081\u308b\u3002- \u30db\u30c3\u30d7H\u306f\u3001\u6642\u9593\u306e\u6ed1\u3089\u304b\u3055\u3068\u8a08\u7b97\u91cf\u306e\u59a5\u5354\u70b9\u3067\u6c7a\u3081\u308b\u3002\u97f3\u58f0\u3084\u6a5f\u68b0\u97f3\u3067\u306f25%\u301c75%\u30aa\u30fc\u30d0\u30fc\u30e9\u30c3\u30d7\uff08H=N\/4\u301cN\/1\uff09\u306a\u3069\u304c\u3088\u304f\u4f7f\u308f\u308c\u3001\u30b9\u30da\u30af\u30c8\u30ed\u30b0\u30e9\u30e0\u306e\u6ed1\u3089\u304b\u3055\u3068\u51e6\u7406\u8ca0\u8377\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u53d6\u308b\u3002- \u7a93\u306e\u7a2e\u985e\u306f\u3001\u5f37\u5f31\u306e\u5dee\u304c\u5927\u304d\u3044\u4fe1\u53f7\u3084\u5f31\u3044\u7dda\u30b9\u30da\u30af\u30c8\u30eb\u3092\u6f0f\u308c\u304b\u3089\u5b88\u308a\u305f\u3044\u5834\u5408\u306f\u30b5\u30a4\u30c9\u30ed\u30fc\u30d6\u306e\u4f4e\u3044\u7a93\uff08\u30d6\u30e9\u30c3\u30af\u30de\u30f3\u30fb\u30cf\u30ea\u30b9\u306a\u3069\uff09\u3001\u5468\u6ce2\u6570\u5206\u96e2\u3092\u91cd\u8996\u3057\u305f\u3044\u5834\u5408\u306f\u30cf\u30f3\uff0f\u30cf\u30df\u30f3\u30b0\u3092\u8d77\u70b9\u306b\u8a66\u3059\u3002\u632f\u5e45\u306e\u7d76\u5bfe\u5024\u3092\u91cd\u8996\u3059\u308b\u6821\u6b63\u7528\u9014\u3067\u306f\u30d5\u30e9\u30c3\u30c8\u30c8\u30c3\u30d7\u7a93\u306e\u9078\u629e\u80a2\u3082\u3042\u308b\u304c\u3001\u5206\u89e3\u80fd\u306f\u72a0\u7272\u306b\u306a\u308b\u3002[8][7][1][2]\n\n\n\n
\u30d5\u30ec\u30fc\u30df\u30f3\u30b0\u306e\u52b9\u679c\u3092\u8aad\u307f\u53d6\u308b\u306b\u306f\u3001\u30b9\u30da\u30af\u30c8\u30ed\u30b0\u30e9\u30e0\u304c\u6709\u52b9\u3060\u3002\u6a2a\u8ef8\u306b\u6642\u9593\u3001\u7e26\u8ef8\u306b\u5468\u6ce2\u6570\u3001\u8272\u306b\u5f37\u3055\u3092\u3068\u308b\u56f3\u3067\u3001\u7a93\u9577\u3068\u30db\u30c3\u30d7\u3092\u5909\u3048\u308b\u3068\u3001\u6a2a\u65b9\u5411\uff08\u6642\u9593\uff09\u3068\u7e26\u65b9\u5411\uff08\u5468\u6ce2\u6570\uff09\u306e\u300c\u7d30\u304b\u3055\u300d\u304c\u5909\u308f\u308b\u3002\u77ed\u3044\u7a93\u30fb\u9ad8\u30aa\u30fc\u30d0\u30fc\u30e9\u30c3\u30d7\u3067\u306f\u3001\u5909\u5316\u306e\u77ac\u9593\u304c\u306f\u3063\u304d\u308a\u898b\u3048\u308b\u304c\u3001\u5e2f\u57df\u306e\u7b4b\u304c\u592a\u3081\u306b\u898b\u3048\u308b\u3002\u9577\u3044\u7a93\u30fb\u4f4e\u30aa\u30fc\u30d0\u30fc\u30e9\u30c3\u30d7\u3067\u306f\u3001\u7b4b\u306f\u7d30\u304f\u5206\u304b\u308c\u308b\u304c\u3001\u51fa\u5165\u308a\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u304c\u307c\u3084\u3051\u308b\u3002\u89e3\u6790\u8a18\u4e8b\u3084\u5b9f\u88c5\u4f8b\u3067\u3082\u3001\u30cf\u30f3\uff08\u30cf\u30cb\u30f3\u30b0\uff09\u7a93\u3068\u6240\u5b9a\u306e\u30aa\u30fc\u30d0\u30fc\u30e9\u30c3\u30d7\u3067\u6642\u9593\u5207\u308a\u51fa\u3057\u2192FFT\u2192\u5e73\u5747\u30fb\u8868\u793a\u3068\u3044\u3046\u6d41\u308c\u304c\u7d39\u4ecb\u3055\u308c\u3066\u3044\u308b\u3002[3][8]\n\n\n\n
\u6ce8\u610f\u70b9\u3082\u3044\u304f\u3064\u304b\u3042\u308b\u3002- \u300c\u6574\u6570\u5468\u671f\u3067\u5207\u308c\u3066\u3044\u306a\u3044\u6b63\u5f26\u6ce2\u300d\u306f\u3001\u7a93\u306a\u3057\uff08\u77e9\u5f62\uff09\u3060\u3068\u30ea\u30fc\u30b1\u30fc\u30b8\u304c\u5f37\u304f\u51fa\u308b\u3002\u30cf\u30f3\u3084\u30cf\u30df\u30f3\u30b0\u3067\u7aef\u3092\u6ed1\u3089\u304b\u306b\u3059\u308b\u3068\u6f0f\u308c\u306f\u6e1b\u308b\u304c\u3001\u30d4\u30fc\u30af\u304c\u5e83\u304c\u308b\u3076\u3093\u5206\u89e3\u80fd\u306b\u306f\u5f71\u97ff\u3059\u308b\u3002\u7a93\u306e\u632f\u5e45\u88dc\u6b63\uff08\u7a93\u306b\u3088\u308b\u5e73\u5747\u632f\u5e45\u4f4e\u4e0b\u3092\u88dc\u3046\u4fc2\u6570\uff09\u3084\u3001PSD\u63db\u7b97\u6642\u306e\u7b49\u4fa1\u96d1\u97f3\u5e2f\u57df\u5e45\uff08ENBW\uff09\u88dc\u6b63\u3092\u5fd8\u308c\u306a\u3044\u3002- \u8868\u793a\u306e\u7d30\u304b\u3055\u3092\u4e0a\u3052\u308b\u300c\u30bc\u30ed\u30d1\u30c7\u30a3\u30f3\u30b0\u300d\u306f\u3001\u5468\u6ce2\u6570\u76ee\u76db\u308a\u3092\u7d30\u304b\u304f\u898b\u305b\u308b\u88dc\u9593\u3067\u3042\u308a\u3001\u771f\u306e\u5206\u89e3\u80fd\uff08fs\/N\uff09\u306f\u7a93\u9577\u3067\u6c7a\u307e\u308b\u70b9\u306b\u6ce8\u610f\u3059\u308b\u3002- \u9006\u5909\u63db\uff08ISTFT\uff09\u3067\u6642\u9593\u6ce2\u5f62\u3092\u518d\u5408\u6210\u3059\u308b\u5834\u5408\u306f\u3001\u7a93\u3068\u30db\u30c3\u30d7\u306e\u7d44\u307f\u5408\u308f\u305b\u304c\u300c\u91cd\u306d\u5408\u308f\u305b\u30671\u306b\u306a\u308b\u6761\u4ef6\u300d\uff08COLA\u6761\u4ef6\uff09\u3092\u6e80\u305f\u3059\u8a2d\u5b9a\u3092\u9078\u3076\u3053\u3068\u304c\u671b\u307e\u3057\u3044\u3002\u4e00\u822c\u7684\u306a\u7a93\u3068\u9069\u5207\u306a\u30aa\u30fc\u30d0\u30fc\u30e9\u30c3\u30d7\u306a\u3089\u3001\u91cd\u306d\u5408\u308f\u305b\u6642\u306b\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3067\u5fa9\u5143\u3067\u304d\u308b\u3053\u3068\u304c\u5b9f\u88c5\u4f8b\u3067\u3082\u793a\u3055\u308c\u3066\u3044\u308b\u3002[4][8][2][5]\n\n\n\n
\u6545\u969c\u4e88\u77e5\u3078\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9\u306f\u660e\u5feb\u3060\u3002- \u30c8\u30ec\u30f3\u30c9\u76e3\u8996: \u540c\u3058\u904b\u8ee2\u6761\u4ef6\u3067\u30d5\u30ec\u30fc\u30e0\u3092\u5207\u308a\u3001\u5404\u30d5\u30ec\u30fc\u30e0\u306e\u7279\u5fb4\u91cf\uff08\u5e2f\u57dfRMS\u3001\u30b9\u30da\u30af\u30c8\u30eb\u30d4\u30fc\u30af\u3001\u30bc\u30ed\u4ea4\u5dee\u7387\u306a\u3069\uff09\u3092\u6642\u7cfb\u5217\u306b\u4e26\u3079\u308b\u3068\u3001\u5f90\u3005\u306b\u5897\u3048\u308b\u6210\u5206\u3084\u65ad\u7d9a\u7684\u306a\u30a4\u30d9\u30f3\u30c8\u304c\u898b\u3064\u3051\u3084\u3059\u3044\u3002- \u30a4\u30d9\u30f3\u30c8\u691c\u51fa: \u9ad8\u30aa\u30fc\u30d0\u30fc\u30e9\u30c3\u30d7\u3067\u30d5\u30ec\u30fc\u30df\u30f3\u30b0\u3057\u3001\u5404\u30d5\u30ec\u30fc\u30e0\u306e\u30a8\u30cd\u30eb\u30ae\u30fc\u3084\u9ad8\u5468\u6ce2\u6bd4\u7387\u304c\u3057\u304d\u3044\u5024\u3092\u8d85\u3048\u305f\u533a\u9593\u3092\u300c\u5019\u88dc\u300d\u3068\u3057\u3066\u5207\u308a\u51fa\u3057\u3001\u8a73\u7d30\u306bFFT\u3084\u30a8\u30f3\u30d9\u30ed\u30fc\u30d7\u89e3\u6790\u3092\u304b\u3051\u308b\u4e8c\u6bb5\u69cb\u3048\u306b\u3059\u308b\u3068\u3001\u8a08\u7b97\u91cf\u3068\u898b\u9003\u3057\u306e\u30d0\u30e9\u30f3\u30b9\u304c\u3088\u3044\u3002- \u5468\u6ce2\u6570\u6307\u7d0b\u306e\u5b89\u5b9a\u5316: \u30d5\u30ec\u30fc\u30e0\u5185\u3067\u7a93\u3092\u639b\u3051\u3066\u30ea\u30fc\u30b1\u30fc\u30b8\u3092\u6291\u3048\u308b\u3068\u3001\u56de\u8ee2\u57fa\u672c\u5468\u6ce2\u6570\u3084\u5074\u5e2f\u57df\u306a\u3069\u306e\u7d30\u3044\u30d4\u30fc\u30af\u304c\u8aad\u307f\u53d6\u308a\u3084\u3059\u304f\u306a\u308a\u3001\u6b63\u5e38\u3068\u306e\u6bd4\u8f03\uff08\u5dee\u5206\u30fb\u6bd4\u7387\uff09\u304c\u5b89\u5b9a\u3059\u308b\u3002[9][1][2][6]\n\n\n\n
\u6700\u5f8c\u306b\u8a2d\u5b9a\u306e\u9078\u3073\u65b9\u3092\u624b\u9806\u3067\u793a\u3059\u30021) \u76ee\u7684\u3068\u512a\u5148\u5ea6\u3092\u6c7a\u3081\u308b\uff08\u6642\u9593\u5909\u5316\u3092\u8ffd\u3046\u306e\u304b\u3001\u8fd1\u63a5\u5468\u6ce2\u6570\u306e\u5206\u96e2\u3092\u512a\u5148\u3059\u308b\u306e\u304b\uff09\u30022) \u5fc5\u8981\u5206\u89e3\u80fd\u304b\u3089\u7a93\u9577N\u3092\u521d\u671f\u8a2d\u5b9a\u3059\u308b\uff08\u0394f\u2248fs\/N\uff09\u30023) \u76ee\u8996\u306e\u6ed1\u3089\u304b\u3055\u3084\u691c\u51fa\u9045\u5ef6\u306b\u5408\u308f\u305b\u3066\u30db\u30c3\u30d7H\u3092\u6c7a\u3081\u308b\uff0825\u201375%\u30aa\u30fc\u30d0\u30fc\u30e9\u30c3\u30d7\u304c\u51fa\u767a\u70b9\uff09\u30024) \u7a93\u306f\u30cf\u30f3\uff0f\u30cf\u30df\u30f3\u30b0\u304b\u3089\u8a66\u3057\u3001\u5f31\u3044\u7dda\u6210\u5206\u306e\u4fdd\u8b77\u304c\u5fc5\u8981\u306a\u3089\u30d6\u30e9\u30c3\u30af\u30de\u30f3\u7cfb\u3078\u3001\u632f\u5e45\u78ba\u5ea6\u91cd\u8996\u306a\u3089\u30d5\u30e9\u30c3\u30c8\u30c8\u30c3\u30d7\u3082\u691c\u8a0e\u3059\u308b\u30025) \u7a93\u88dc\u6b63\uff08\u632f\u5e45\u307e\u305f\u306fPSD\u306eENBW\u88dc\u6b63\uff09\u3068\u5fc5\u8981\u306a\u3089\u30bc\u30ed\u30d1\u30c7\u30a3\u30f3\u30b0\u3067\u8868\u793a\u9593\u9694\u3092\u6574\u3048\u3001\u30b9\u30da\u30af\u30c8\u30ed\u30b0\u30e9\u30e0\u3084PSD\u3067\u7d50\u679c\u3092\u70b9\u691c\u3059\u308b\u30026) \u5fc5\u8981\u306b\u5fdc\u3058\u3066\u8a2d\u5b9a\u3092\u5fae\u8abf\u6574\u3057\u3001\u540c\u6761\u4ef6\u3067\u306e\u518d\u73fe\u6027\u3092\u78ba\u8a8d\u3059\u308b\u3002\u3053\u308c\u3089\u306f\u8a08\u6e2c\u30fb\u4fe1\u53f7\u51e6\u7406\u306e\u4e00\u822c\u7684\u306a\u89e3\u8aac\u306b\u6cbf\u3046\u5b9f\u52d9\u7684\u306a\u6d41\u5100\u3067\u3042\u308b\u3002[7][1][8][2][6][3]\n\n\n\n[1] https:\/\/appswingby.com\/%E7%9F%AD%E6%99%82%E9%96%93%E3%83%95%E3%83%BC%E3%83%AA%E3%82%A8%E5%A4%89%E6%8F%9B-%E4%BB%8A%E6%9B%B4%E8%81%9E%E3%81%91%E3%81%AA%E3%81%84it%E7%94%A8%E8%AA%9E%E9%9B%86\/<\/p>\n\n\n\n[2] https:\/\/www.ni.com\/ja\/shop\/data-acquisition\/measurement-fundamentals\/analog-fundamentals\/understanding-ffts-and-windowing.html<\/p>\n\n\n\n[3] https:\/\/ja.wikibooks.org\/wiki\/GNU_Octave_2.1.x_%E6%97%A5%E6%9C%AC%E8%AA%9E%E3%83%9E%E3%83%8B%E3%83%A5%E3%82%A2%E3%83%AB\/%E3%83%87%E3%82%B8%E3%82%BF%E3%83%AB%E4%BF%A1%E5%8F%B7%E5%87%A6%E7%90%86<\/p>\n\n\n\n[4] https:\/\/www.s-musiclab.jp\/max_docs\/mmj_docs\/max4\/msp\/msp_tutorial\/mstu26.html<\/p>\n\n\n\n[5] https:\/\/qiita.com\/takayoshi1968\/items\/636372d464d02699ba4f<\/p>\n\n\n\n[6] https:\/\/www.kennzo.net\/window-function<\/p>\n\n\n\n[7] https:\/\/www.toyo.co.jp\/mecha\/faq\/detail\/id=2670<\/p>\n\n\n\n[8] https:\/\/watlab-blog.com\/2019\/05\/20\/spectrogram-piano\/<\/p>\n\n\n\n[9] https:\/\/qiita.com\/icoxfog417\/items\/d376200407e97ce29ee5<\/p>\n\n\n\n[10] https:\/\/www.jstage.jst.go.jp\/article\/jasj\/75\/3\/75_156\/_pdf<\/p>\n\n\n\n[11] https:\/\/patents.google.com\/patent\/JPH0851580A\/ja<\/p>\n\n\n\n[12] https:\/\/svmeas.rion.co.jp\/support\/p38veq0000000cmg-att\/FFT_07881.pdf<\/p>\n\n\n\n[13] https:\/\/www.jstage.jst.go.jp\/article\/jsmbe\/57\/2-3\/57_75\/_pdf\/-char\/ja<\/p>\n\n\n\n[14] https:\/\/elcamy.com\/blog\/audio-data-division<\/p>\n\n\n\n[15] https:\/\/cognicull.com\/ja\/12l2n8lz<\/p>\n\n\n\n[16] https:\/\/repository.dl.itc.u-tokyo.ac.jp\/record\/54478\/files\/K-07730.pdf<\/p>\n\n\n\n[17] https:\/\/www.docomo.ne.jp\/corporate\/technology\/rd\/technical_journal\/bn\/vol32_1\/003.html<\/p>\n\n\n\n[18] https:\/\/book.st-hakky.com\/purpose\/complete-guide-to-preprocessing-audio-data-for-improving-machine-learning-model-performance<\/p>\n\n\n\n[19] https:\/\/www.onosokki.co.jp\/HP-WK\/eMM_back\/emm150.pdf[20] https:\/\/jp.mathworks.com\/matlabcentral\/answers\/350115-<\/p>\n\n\n\n
\u203b\u672c\u30da\u30fc\u30b8\u306f\u3001AI\u306e\u6d3b\u7528\u3084\u7814\u7a76\u306b\u95a2\u9023\u3059\u308b\u539f\u7406\u30fb\u6a5f\u5668\u30fb\u30c7\u30d0\u30a4\u30b9\u306b\u3064\u3044\u3066\u5b66\u3076\u305f\u3081\u306b\u3001\u500b\u4eba\u7684\u306b\u6574\u7406\u30fb\u8a18\u8ff0\u3057\u3066\u3044\u308b\u3082\u306e\u3067\u3059\u3002\u5185\u5bb9\u306b\u306f\u8aa4\u308a\u3084\u898b\u843d\u3068\u3057\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u53ef\u80fd\u6027\u3082\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u3082\u3057\u304a\u6c17\u3065\u304d\u306e\u70b9\u3084\u3054\u52a9\u8a00\u7b49\u3054\u3056\u3044\u307e\u3057\u305f\u3089\u3001\u3054\u9023\u7d61\u3044\u305f\u3060\u3051\u307e\u3059\u3068\u5e78\u3044\u3067\u3059\u3002<\/strong><\/p>\n\n\n\n \u203b\u672c\u30da\u30fc\u30b8\u306e\u5185\u5bb9\u306f\u3001\u500b\u4eba\u7684\u306a\u5b66\u7fd2\u304a\u3088\u3073\u60c5\u5831\u6574\u7406\u3092\u76ee\u7684\u3068\u3057\u3066\u63d0\u4f9b\u3057\u3066\u3044\u308b\u3082\u306e\u3067\u3042\u308a\u3001\u305d\u306e\u6b63\u78ba\u6027\u3001\u5b8c\u5168\u6027\u3001\u6709\u7528\u6027\u7b49\u306b\u3064\u3044\u3066\u3044\u304b\u306a\u308b\u4fdd\u8a3c\u3082\u884c\u3044\u307e\u305b\u3093\u3002\u672c\u30da\u30fc\u30b8\u306e\u60c5\u5831\u3092\u5229\u7528\u3057\u305f\u3053\u3068\u3001\u307e\u305f\u306f\u5229\u7528\u3067\u304d\u306a\u304b\u3063\u305f\u3053\u3068\u306b\u3088\u3063\u3066\u767a\u751f\u3057\u305f\u640d\u5bb3\uff08\u76f4\u63a5\u7684\u30fb\u9593\u63a5\u7684\u30fb\u7279\u5225\u30fb\u5076\u767a\u7684\u30fb\u7d50\u679c\u7684\u640d\u5bb3\u3092\u542b\u307f\u307e\u3059\u304c\u3001\u3053\u308c\u3089\u306b\u9650\u308a\u307e\u305b\u3093\uff09\u306b\u3064\u3044\u3066\u3001\u5f53\u65b9\u306f\u4e00\u5207\u8cac\u4efb\u3092\u8ca0\u3044\u307e\u305b\u3093\u3002\u3054\u5229\u7528\u306f\u5229\u7528\u8005\u3054\u81ea\u8eab\u306e\u8cac\u4efb\u3067\u304a\u9858\u3044\u3044\u305f\u3057\u307e\u3059\u3002<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":" 4. \u30c7\u30fc\u30bf\u524d\u51e6\u7406 4.3 \u30a6\u30a3\u30f3\u30c9\u30a6\u51e6\u7406\u306b\u3088\u308b\u5206\u5272 \u9577\u3044\u9332\u97f3\u3084\u9023\u7d9a\u3059\u308b\u30bb\u30f3\u30b5\u30fc\u4fe1\u53f7\u3092\u305d\u306e\u307e\u307e\u4e00\u5ea6\u306b\u89e3\u6790\u3059\u308b\u3068\u3001\u6642\u9593\u3054\u3068\u306e\u5909\u5316\u304c\u5e73\u5747\u3055\u308c\u3066\u3057\u307e\u3044\u3001\u5909\u5316\u306e\u77ac\u9593\u3084\u77ed\u3044\u30a4\u30d9\u30f3\u30c8\u3092\u898b\u843d\u3068\u3057\u3084\u3059\u3044\u3002\u305d\u3053\u3067\u7528\u3044\u308b\u57fa\u672c\u304c\u300c\u30a6\u30a3\u30f3\u30c9\u2026<\/p>\n","protected":false},"author":1,"featured_media":571,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-657","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research"],"_links":{"self":[{"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=\/wp\/v2\/posts\/657","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=657"}],"version-history":[{"count":2,"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=\/wp\/v2\/posts\/657\/revisions"}],"predecessor-version":[{"id":788,"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=\/wp\/v2\/posts\/657\/revisions\/788"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=\/wp\/v2\/media\/571"}],"wp:attachment":[{"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=657"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=657"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shin-ichi.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=657"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}