{"id":2939,"date":"2007-08-20T18:06:42","date_gmt":"2007-08-20T09:06:42","guid":{"rendered":"http:\/\/audiodesign.co.jp\/blog\/?p=2939"},"modified":"2021-11-19T10:09:45","modified_gmt":"2021-11-19T01:09:45","slug":"%e3%82%a2%e3%83%b3%e3%83%97%e3%81%ae%e6%ad%aa%e6%88%90%e5%88%86%e3%81%aefft%e3%82%b9%e3%83%9a%e3%82%af%e3%83%88%e3%83%ab%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/audiodesign.co.jp\/blog\/?p=2939","title":{"rendered":"\u30a2\u30f3\u30d7\u306e\u6b6a\u6210\u5206\u306eFFT\u30b9\u30da\u30af\u30c8\u30eb\u89e3\u6790"},"content":{"rendered":"

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\u6e2c\u5b9a\u65b9\u6cd5<\/h2>\n

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\n\u6e2c\u5b9a\u6761\u4ef6\u306f10KH\uff5a\u3001\uff11V\u3067\u3059\u3002<\/p>\n

\"\u30a2\u30f3\u30d7\u6b6a\u7387\u306eFFT\u89e3\u6790\u30d6\u30ed\u30c3\u30af\u56f3\"<\/a><\/p>\n

\u6b6a\u7387\u306eFFT\u89e3\u6790\u7d50\u679c<\/h2>\n

\u7d50\u679c\u306f\u4e0b\u8868\u306e\u901a\u308a\u3067\u3059\u3002
\n\u6a2a\u8ef8\u306f\u5468\u6ce2\u6570\u3001\u7e26\u8ef8\u306f\u6b6a\u6210\u5206\u306e\u30b9\u30da\u30af\u30c8\u30eb\u306e\u5927\u304d\u3055\u306b\u306a\u308a\u307e\u3059\u3002AV\u30a2\u30f3\u30d7\u3001\u30d7\u30ea\u30e1\u30a4\u30f3\u30a2\u30f3\u30d7\u306710KHz\u306e\u57fa\u672c\u6ce2\u304c\u9664\u53bb\u3057\u5207\u308c\u3066\u3044\u306a\u3044\u3088\u3046\u306b\u898b\u3048\u307e\u3059\u304c\u3001\u3053\u308c\u306f\u308f\u305a\u304b\u306a\u30cf\u30e0\u6210\u5206\uff0850Hz\uff09\u304c\u4e57\u3063\u305f10.05Khz\u306a\u3069\u306e\u30b9\u30da\u30af\u30c8\u30eb\u3067\u3059\u3002\u30aa\u30fc\u30c7\u30a3\u30aa\u30c7\u30b6\u30a4\u30f3\u306e\u30a2\u30f3\u30d7\u306fSN\u304c\u826f\u3044\u306e\u3067\u3053\u306e\u6210\u5206\u304c\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n

\u30d7\u30ea\u30a2\u30f3\u30d7\u306e\u6b6a\u6210\u5206\u306e\u5468\u6ce2\u6570\u89e3\u6790<\/p>\n\n\n\n\n\n\n
\n

\u30a2\u30f3\u30d7<\/p>\n<\/td>\n

\n

\u6b6a\u6210\u5206\u306eFFT\u30b9\u30da\u30af\u30c8\u30eb<\/p>\n<\/td>\n

\n

\u30b3\u30e1\u30f3\u30c8<\/p>\n<\/td>\n<\/tr>\n

AV\u30a2\u30f3\u30d7\u30d7\u30ea\u30a2\u30f3\u30d7\u90e8
\nTHD+N=
\n0.011%<\/td>\n		\"AV\u30a2\u30f3\u30d7\u306e\u6b6a\u6210\u5206\u306eFFT\u30b9\u30da\u30af\u30c8\u30eb\"<\/a><\/td>\n\u30fb3\u6b21\u9ad8\u8abf\u6ce2\u6210\u5206(30KHz)\u304c\u6700\u3082\u5927\u304d\u306a\u6b6a\u6210\u5206\u3067\u3059\u3002
\n\u30fb3\u6b21\u9ad8\u8abf\u6ce2\u306e\u4ed6\u306b7.5\u6b21(75KHz)\u306b\u3082\u5927\u304d\u306a\u6b6a\u6210\u5206\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u308c\u306f\u767a\u4fe1\u5668\u306e\u51fa\u529b\u306b\u308f\u305a\u304b\u306b\u542b\u307e\u308c\u308b\u6b6a\u304c\u306a\u305c\u304b\u5f37\u8abf\u3055\u308c\u3066\u3044\u308b\u3088\u3046\u3067\u3059\u3002
\n\u30fb\u4ed6\u306b40-60KH\uff5a\u306b\u7121\u6570\u306e\u975e\u9ad8\u8abf\u6ce2\u306e\u6b6a\u6210\u5206\u304c\u3042\u308a\u307e\u3059\u3002<\/td>\n<\/tr>\n
\u30d7\u30ea\u30e1\u30a4\u30f3\u30a2\u30f3\u30d7
\n\u30d7\u30ea\u30a2\u30f3\u30d7\u90e8
\nTHD+N=
\n0.0054%<\/td>\n		\"\u30a2\u30f3\u30d7\u306e\u6b6a\u6210\u5206\u306eFFT\u30b9\u30da\u30af\u30c8\u30eb\"<\/a><\/td>\n\u9ad8\u8abf\u6ce2\u6b6a\u306e\u4e3b\u6210\u5206\u306f2\u6b21\u30683\u6b21\u6210\u5206\u3067\u3059\u304c70-80KHz\u4ed8\u8fd1\u306e\u6b6a\u3082\u5927\u304d\u304f\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/td>\n<\/tr>\n
\u30aa\u30fc\u30c7\u30a3\u30aa\u30c7\u30b6\u30a4\u30f3
\n\u30d7\u30ea\u30a2\u30f3\u30d7<\/a>
\nTHD+N=
\n0.0023%<\/td>\n		\"\u30aa\u30fc\u30c7\u30a3\u30aa\u30c7\u30b6\u30a4\u30f3\u30a2\u30f3\u30d7\u306e\u6b6a\u6210\u5206\u306eFFT\u30b9\u30da\u30af\u30c8\u30eb\"<\/a><\/td>\n\u57fa\u672c\u7684\u306b\u76ee\u7acb\u3063\u305f\u6b6a\u6210\u5206\u304c\u3042\u308a\u307e\u305b\u3093\u3002\u975e\u5e38\u306b\u512a\u79c0\u3067\u3059\u3002
\n\u6b6a\u6210\u5206\u304c\u7121\u3044\u3060\u3051\u3067\u306a\u304f\u300110KHz\u4ee5\u4e0a\u306e\u30d9\u30fc\u30b9\u30e9\u30a4\u30f3\uff08\u57fa\u5e95\uff09\u90e8\u5206\u3082\u5927\u304d\u304f\u6e1b\u5c11\u3057\u3066\u3044\u307e\u3059\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

FFT\u89e3\u6790\u306e\u307e\u3068\u3081<\/h2>\n

\u6b6a\u6210\u5206\u306eFFT\u89e3\u6790\u3092\u884c\u3046\u3053\u3068\u3067\u3001\u30a2\u30f3\u30d7\u306e\u6027\u80fd\u3092\u3088\u308a\u8a73\u7d30\u306b\u77e5\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3057\u305f\u3002\u307e\u305f\u5468\u6ce2\u6570\u7279\u6027\u306e\u512a\u308c\u305f\u30aa\u30fc\u30c7\u30a3\u30aa\u30c7\u30b6\u30a4\u30f3\u306e\u30a2\u30f3\u30d7\u304c\u7d50\u679c\u7684\u306b\u6b6a\u7387\u7279\u6027\u3082\u975e\u5e38\u306b\u512a\u308c\u3066\u304a\u308a\u3001\u6b6a\u6210\u5206\u3092\u307b\u3068\u3093\u3069\u767a\u751f\u3057\u3066\u3044\u306a\u3044\u4e8b\u304c\u308f\u304b\u308a\u307e\u3057\u305f\u3002<\/p>\n

(2007\/08\/20)<\/p>\n","protected":false},"excerpt":{"rendered":"

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→<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[38,40],"tags":[],"class_list":["post-2939","post","type-post","status-publish","format-standard","hentry","category-38","category-preamp-"],"yoast_head":"\n\u30a2\u30f3\u30d7\u306e\u6b6a\u6210\u5206\u306eFFT\u30b9\u30da\u30af\u30c8\u30eb\u89e3\u6790 - \u30aa\u30fc\u30c7\u30a3\u30aa\u30c7\u30b6\u30a4\u30f3\u306e\u30d6\u30ed\u30b0<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/audiodesign.co.jp\/blog\/?p=2939\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u30a2\u30f3\u30d7\u306e\u6b6a\u6210\u5206\u306eFFT\u30b9\u30da\u30af\u30c8\u30eb\u89e3\u6790 - \u30aa\u30fc\u30c7\u30a3\u30aa\u30c7\u30b6\u30a4\u30f3\u306e\u30d6\u30ed\u30b0\" \/>\n<meta property=\"og:description\" content=\"\u306f\u3058\u3081\u306b 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