{"id":2635,"date":"2023-05-13T12:05:41","date_gmt":"2023-05-13T03:05:41","guid":{"rendered":"https:\/\/www.kyu.kr\/?p=2635"},"modified":"2023-05-13T12:24:51","modified_gmt":"2023-05-13T03:24:51","slug":"%ec%98%a4%ec%8b%a4%eb%a1%9c%ec%8a%a4%ec%bd%94%ed%94%84%ec%97%90%ec%84%9c-fft-%ed%99%95%ec%9d%b8%ed%95%98%ea%b8%b0","status":"publish","type":"post","link":"https:\/\/www.kyu.kr\/?p=2635","title":{"rendered":"\uc624\uc2e4\ub85c\uc2a4\ucf54\ud504\uc5d0\uc11c FFT \ud655\uc778\ud558\uae30"},"content":{"rendered":"\n<p>\ud0a4\uc0ac\uc774\ud2b8 EDUX-1052G\uc5d0 \uac70\uae08\uc744 \uc9c0\ubd88\ud55c \uc774\uc720\uac00 \ub531 \ub450 \uac00\uc9c0\uc600\uc2b5\ub2c8\ub2e4. Bode plot\uc744 \ubcf4\uace0 \uc2f6\ub2e4. FFT\ub97c \ubcf4\uace0 \uc2f6\ub2e4.<\/p>\n\n\n\n<p>\uc9c0\uae08\uae4c\uc9c0 Bode plot\uc774 \ud3ec\ud568\ub41c \uae00\uc744 \ub9ce\uc774 \uc37c\ub294\ub370, FFT\uac00 \ud3ec\ud568\ub41c \uc801\uc740 \uc5c6\uc5c8\uc2b5\ub2c8\ub2e4. \uc774\uc720\ub294 \ud654\uba74\uc774 \uc774\uc0c1\ud55c \uac83\ub9cc \ubcf4\uc5ec\uc92c\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \uc774\ub7f0\uac70\uc8e0.<\/p>\n\n\n\n<p><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"503\" src=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_9.png\" alt=\"\" class=\"wp-image-2636\" srcset=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_9.png 800w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_9-150x94.png 150w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_9-768x483.png 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n\n\n<p>\ubcf4\ub77c\uc0c9 \uc120\uc774 FFT\uc778\ub370 \ubb54\uac00 FFT\uc778 \ub4ef \uc544\ub2cc\ub4ef \uc54c \uc218 \uc5c6\uc5c8\uc2b5\ub2c8\ub2e4. \uadf8\ub7ec\uba74\uc11c \uc7a5\ube44\ub97c \ud0d3\ud588\ub294\ub370\uc694, \uc720\ud29c\ube0c \ub3d9\uc601\uc0c1\uc744 \ubcf4\uace0 \ubb58 \ubaa8\ub974\uace0 \uc788\uc5c8\ub294\uc9c0 \uc54c\uac8c \ub410\uc2b5\ub2c8\ub2e4. x \ucd95 \uc2a4\ucf00\uc77c\uc774 \uc800\ub807\uac8c \ud55c \uce78\uc5d0 500us \uc815\ub3c4\ub85c \ub418\uba74 \uc548\ub418\ub294\uad70\uc694. \ub108\ub9cc \ubab0\ub790\uc5b4!\uac00 \ud558\ub098 \ub354 \uc0dd\uae34 \uac83 \uac19\uc2b5\ub2c8\ub2e4. ^^<\/p>\n\n\n\n<p>x\ucd95 \uc2a4\ucf00\uc77c\uc744 \ub354 \uae34 \uc2dc\uac04\uc73c\ub85c \ubc14\uafc9\ub2c8\ub2e4. 2ms\uc5d0\uc11c\ub294 \ub4dc\ub514\uc5b4 \uc54c\uc544\ubcfc \uc218 \uc788\ub294 \ubaa8\uc591\uc774 \ub098\uc624\uae30 \uc2dc\uc791\ud569\ub2c8\ub2e4.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"503\" src=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_10.png\" alt=\"\" class=\"wp-image-2637\" srcset=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_10.png 800w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_10-150x94.png 150w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_10-768x483.png 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n\n\n<p>5ms\ub9cc \ub418\uc5b4\ub3c4 \uc774\uc81c \ucda9\ubd84\ud788 \uc54c\uc544\ubcfc \uc218 \uc788\uace0 \uce21\uc815\uc744 \ud560 \uc218 \uc788\uaca0\uc2b5\ub2c8\ub2e4\ub9cc, \uc0b4\uc9dd \ubd80\uc871\ud560 \uac83 \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"503\" src=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_11.png\" alt=\"\" class=\"wp-image-2638\" srcset=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_11.png 800w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_11-150x94.png 150w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_11-768x483.png 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n\n\n<p>20ms \uc815\ub3c4\uba74 \ucda9\ubd84\ud560 \uac83 \uac19\uc2b5\ub2c8\ub2e4\ub9cc, \u00a0\uad73\uc774 20ms\uc5d0\uc11c \uba48\ucd9c \ud544\uc694\ub3c4 \uc5c6\uc2b5\ub2c8\ub2e4. \uc774\uac74 \uc2a4\ucf54\ud504\uc758 \uc0d8\ud50c\ub9c1 \uac00\ub2a5 \uc218\uc640 \uad00\uacc4\uac00 \uc788\ub294 \uac83 \uac19\uc2b5\ub2c8\ub2e4. \uc544\ub798 \ud654\uba74 \ucea1\uccd0\ub294 20ms\ub85c \uc8fc\ub85c \ud588\uc9c0\ub9cc \uc800\ub294 100ms\ub97c \uc4f8 \uac83 \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"503\" src=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_13.png\" alt=\"\" class=\"wp-image-2639\" srcset=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_13.png 800w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_13-150x94.png 150w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_13-768x483.png 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n\n\n<p>\uc790\uc791\ud55c CV391 SE \uc570\ud504\uc758 \ubcfc\ub968\uc744 \ucd5c\ub300\ub85c \ud588\uc744 \ub54c 6.52Vrms \ucd9c\ub825\uc774 \ub098\uc624\uace0 \ub9ce\uc740 \ud558\ubaa8\ub2c9\uc774 \uc11e\uc5ec \uc788\uc74c\uc744 \ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uadf8\ub798\ud504\uac00 \uc800\ub807\uac8c \ub098\uc624\ub294 \uac83\uc740 \uc635\uc158\uc5d0\uc11c Tree top\uc744 \uc120\ud0dd\ud588\uae30 \ub54c\ubb38\uc778\ub370 \ubcc4\ub85c \ucde8\ud5a5\uc774 \uc544\ub2c8\ub77c\uc11c \uadf8\ub0e5 \ub514\ud3f4\ud2b8 \uc635\uc158\uc73c\ub85c (Hanning) \ubc14\uafe8\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p>\ub2e4\uc74c\uc740 Span\uacfc Center\uc778\ub370 Span\uc740 \uc5bc\ub9c8\ub9cc\ud07c \uc798\ub77c\ub0b4\uc11c \ubcf4\uace0 \uc2f6\uc740\uc9c0\uc774\uace0, Center\ub294 \ud654\uba74 \uac00\uc6b4\ub370 \uba87 Hz\ub97c \uc704\uce58\uc2dc\ud0ac\uc9c0?\uc778 \uac83 \uac19\uc2b5\ub2c8\ub2e4. \uc570\ud504 \uce21\uc815\uc5d0\uc11c\ub294 \ub2f9\uadfc 20KHz\ub098 20KHz\uae4c\uc9c0\ub9cc \ubd10\ub3c4 \ub418\uaca0\uc8e0. \uadf8\ub7ec\uba74 \ub2e8\uc21c\ud558\uac8c Center\ub294 10KHz\ub97c \uc8fc\uba74 \ub420 \uac83 \uac19\uc2b5\ub2c8\ub2e4. \uadf8\ub9ac\uace0 \uce21\uc815\ub41c \ud30c\ud615\uc740 \ud654\uba74\uc5d0 \uc548 \ub098\uc624\ub3c4\ub85d \uaebc\ubc84\ub9bd\ub2c8\ub2e4.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"503\" src=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_16.png\" alt=\"\" class=\"wp-image-2640\" srcset=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_16.png 800w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_16-150x94.png 150w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_16-768x483.png 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n\n\n<p>\ubcf4\ub2c8 \ud558\ubaa8\ub2c9\uc774 \ud280\uc5b4\ub098\uc62c\ub9cc\ud07c \uc874\uc7ac\ud558\ub294 \ubd80\ubd84\uc740 \uc911\uc5ed\ub300\uc5d0\ub9cc \uc788\uae30 \ub54c\ubb38\uc5d0 \uace0\uc5ed, \ucd08\uace0\uc5ed\uc740 \ubcfc \ud544\uc694\ub3c4 \uc5c6\uc5b4\ubcf4\uc785\ub2c8\ub2e4. \uc808\ubc18\uc529 \uc798\ub77c\ub0b4 \ubd05\ub2c8\ub2e4.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"503\" src=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_17.png\" alt=\"\" class=\"wp-image-2641\" srcset=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_17.png 800w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_17-150x94.png 150w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_17-768x483.png 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n\n\n<p>Span\uc744 10KHz\ub85c \uc904\uc600\uace0, Center\ub97c 5KHz\ub85c \ubc14\uafe8\uc2b5\ub2c8\ub2e4. \uc880 \ub354 \ubcf4\uae30 \ud3b8\ud569\ub2c8\ub2e4. \uc57d 1W \ucd9c\ub825 \uc0c1\ud0dc\uc5d0\uc11c 2\ucc28, 3\ucc28, 5\ucc28 \ud558\ubaa8\ub2c9\uae4c\uc9c0 \ubcf4\uc774\ub294 \uac83 \uac19\uc2b5\ub2c8\ub2e4. <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"503\" src=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_18.png\" alt=\"\" class=\"wp-image-2642\" srcset=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_18.png 800w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_18-150x94.png 150w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_18-768x483.png 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n\n\n<p>\uc57d 2W \ucd9c\ub825\uc5d0\uc11c\ub294 \ud558\ubaa8\ub2c9\uc774 \ub354 \ucee4\uc9c4 \uac83 \uac19\uc740\ub370 \uc5bc\ub9c8\ub098 \ucee4\uc84c\ub294\uc9c0 \uc54c \uc218 \uc5c6\uc2b5\ub2c8\ub2e4. \uba87 dB\uc778\uc9c0 \ubcf4\ub824\uba74 Cursor \uae30\ub2a5\uc744 \uc774\uc6a9\ud569\ub2c8\ub2e4.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"503\" src=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_7.png\" alt=\"\" class=\"wp-image-2643\" srcset=\"https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_7.png 800w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_7-150x94.png 150w, https:\/\/www.kyu.kr\/wp-content\/uploads\/2023\/05\/scope_7-768x483.png 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n\n\n<p>X1\uc774 1KHz, X2\uac00 2KHz\uc774\uace0 \uac01\uac01 11.250dBV, -15.712dBV\ub85c \uce21\uc815\ub418\uace0 \uc788\ub124\uc694. \uc774\uac74 x\ucd95 \uc2a4\ucf00\uc77c\uc774 \ud55c \uce78\uc5d0 100ms\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<p id=\"SE-9aa94bc4-0585-4473-9ed9-49fdbbe4a6a7\"><\/p>\n\n\n\n<p>FFT\ub97c \ubcf4\ub824\uba74 x\ucd95 \uc2a4\ucf00\uc77c\uc744 \ubc14\uafd4\ub77c, \ubc30\uc6c0\uc744 \uc5bb\uc740 \ub3d9\uc601\uc0c1\uc740 \uc544\ub798\uc5d0 \ub9c1\ud06c\ud569\ub2c8\ub2e4. <\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"epyt-video-wrapper\"><iframe loading=\"lazy\"  id=\"_ytid_27855\"  width=\"620\" height=\"370\"  data-origwidth=\"620\" data-origheight=\"370\"  data-relstop=\"1\" src=\"https:\/\/www.youtube.com\/embed\/xfw73Hzxf14?enablejsapi=1&#038;autoplay=0&#038;cc_load_policy=0&#038;cc_lang_pref=&#038;iv_load_policy=1&#038;loop=0&#038;rel=0&#038;fs=1&#038;playsinline=0&#038;autohide=2&#038;theme=dark&#038;color=red&#038;controls=1&#038;disablekb=0&#038;\" class=\"__youtube_prefs__  epyt-is-override  no-lazyload\" title=\"YouTube player\"  allow=\"fullscreen; accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen data-no-lazy=\"1\" data-skipgform_ajax_framebjll=\"\"><\/iframe><\/div>\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\ud0a4\uc0ac\uc774\ud2b8 EDUX-1052G\uc5d0 \uac70\uae08\uc744 \uc9c0\ubd88\ud55c \uc774\uc720\uac00 \ub531 \ub450 \uac00\uc9c0\uc600\uc2b5\ub2c8\ub2e4. Bode plot\uc744 \ubcf4\uace0 \uc2f6\ub2e4. FFT\ub97c \ubcf4\uace0 \uc2f6\ub2e4. \uc9c0\uae08\uae4c\uc9c0 Bode plot\uc774 \ud3ec\ud568\ub41c \uae00\uc744 \ub9ce\uc774 \uc37c\ub294\ub370, FFT\uac00 \ud3ec\ud568\ub41c \uc801\uc740 \uc5c6\uc5c8\uc2b5\ub2c8\ub2e4. \uc774\uc720\ub294 \ud654\uba74\uc774 \uc774\uc0c1\ud55c \uac83\ub9cc \ubcf4\uc5ec\uc92c\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \uc774\ub7f0\uac70\uc8e0. \ubcf4\ub77c\uc0c9 \uc120\uc774 FFT\uc778\ub370 \ubb54\uac00 FFT\uc778 \ub4ef \uc544\ub2cc\ub4ef \uc54c \uc218 \uc5c6\uc5c8\uc2b5\ub2c8\ub2e4. \uadf8\ub7ec\uba74\uc11c \uc7a5\ube44\ub97c \ud0d3\ud588\ub294\ub370\uc694, \uc720\ud29c\ube0c \ub3d9\uc601\uc0c1\uc744 \ubcf4\uace0 \ubb58 \ubaa8\ub974\uace0 \uc788\uc5c8\ub294\uc9c0 \uc54c\uac8c \ub410\uc2b5\ub2c8\ub2e4. x &hellip;<br \/><a href=\"https:\/\/www.kyu.kr\/?p=2635\" class=\"more-link pen_button pen_element_default pen_icon_arrow_double\"><span class=\"screen-reader-text\">\uc624\uc2e4\ub85c\uc2a4\ucf54\ud504\uc5d0\uc11c FFT \ud655\uc778\ud558\uae30<\/span> \ub354\ubcf4\uae30<\/a><\/p>\n","protected":false},"author":1,"featured_media":2636,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[370,353],"class_list":["post-2635","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-108","tag-edux-1052g","tag-fft"],"_links":{"self":[{"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/posts\/2635","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2635"}],"version-history":[{"count":2,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/posts\/2635\/revisions"}],"predecessor-version":[{"id":2646,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/posts\/2635\/revisions\/2646"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/media\/2636"}],"wp:attachment":[{"href":"https:\/\/www.kyu.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2635"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2635"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2635"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}