{"id":9261,"date":"2010-10-03T17:47:00","date_gmt":"2010-10-03T17:47:00","guid":{"rendered":"http:\/\/melotopia.net\/b\/?p=9261"},"modified":"2010-10-03T17:47:00","modified_gmt":"2010-10-03T17:47:00","slug":"%ec%9d%8c%ed%96%a5%eb%8c%80%ed%8f%ac","status":"publish","type":"post","link":"http:\/\/melotopia.net\/b\/?p=9261","title":{"rendered":"\uc74c\ud5a5\ub300\ud3ec"},"content":{"rendered":"<div class=\"desc\">\n        \uacbd\ucc30\uccad\uc7a5\uc774 \uc9d1\ud68c \ud574\uc0b0\uc744 \uc704\ud574 \uc74c\ud5a5\ub300\ud3ec\ub97c \uc0ac\uc6a9\ud558\uaca0\ub2e4\uace0 \ud588\ub2e4.<\/p>\n<p>        \uadf8 \uc2e4\ud5d8\uacb0\uacfc\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4\uace0 \uc804\ud574\uc9c4\ub2e4.<br \/>\n        <br \/>\n<a href=\"http:\/\/segye.com\/Articles\/News\/Society\/Article.asp?aid=20101001003142&#038;ctg1=01&#038;ctg2=00&#038;subctg1=01&#038;subctg2=00&#038;cid=0101080100000\" target=\"_blank\" title=\"[http:\/\/segye.com\/Articles\/News\/Society\/Article.asp?aid=20101001003142&#038;ctg1=01&#038;ctg2=00&#038;subctg1=01&#038;subctg2=00&#038;cid=0101080100000]\ub85c \uc774\ub3d9\ud569\ub2c8\ub2e4.\"><br \/>\n         http:\/\/segye.com\/Articles\/News\/Society\/Article.asp?aid=20101001003142&#038;ctg1=01&#038;ctg2=00&#038;subctg1=01&#038;subctg2=00&#038;cid=0101080100000<br \/>\n        <\/a><\/p>\n<p>        100\ubbf8\ud130\uc5d0\uc11c 106dB<br \/>\n        <br \/>\n        64\ubbf8\ud130\uc5d0\uc11c 109dB<br \/>\n        <br \/>\n        32\ubbf8\ud130\uc5d0\uc11c 115dB<\/p>\n<p>        \uac70\ub9ac\uac00 3\ubc30\ub098 \ub298\uc5b4\ub0ac\ub294\ub370 \ubcc4\ub85c \uc904\uc5b4\ub4e0 \uac83 \uac19\uc9c0 \uc54a\ub2e4. \uc65c \uadf8\ub7f4\uae4c?<\/p>\n<p>        \ub370\uc2dc\ubca8(dB)\uc758 \uc815\uc758\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<br \/>\n        <br \/>\n        dB = 10log(A)<br \/>\n        <br \/>\n        \uc5ec\uae30\uc11c log\ub294 \ubc11\uc774 10\uc778 \uc0c1\uc6a9\ub85c\uadf8\uc774\ub2e4.<\/p>\n<p>        \uc5d0\ub108\uc9c0 \ubc00\ub3c4A\uac00 \uc5bc\ub9c8\uc778\uc9c0\ub294 \ubaa8\ub974\uaca0\uc9c0\ub9cc, \uc544\ubb34\ud2bc \uc18c\ub9ac\uc5d0 \ub300\ud574\uc11c \uc5d0\ub108\uc9c0 \ubcf4\uc874\ubc95\uce59\uc774 \uc801\uc6a9\ub41c\ub2e4\uace0 \ud558\uba74, \uac00\uc6b0\uc2a4 \ubc95\uce59\uc744 \ub300\ucda9 \uc0ac\uc6a9\ud574 \ubcf4\uba74 \uc5d0\ub108\uc9c0 \ubc00\ub3c4\uac00 \uac70\ub9ac\uc758 \uc81c\uacf1\uc5d0 \ubc18\ube44\ub840\ud574\uc11c \uc904\uc5b4\ub4e0\ub2e4\ub294 \uac83\uc744 \uc54c \uc218 \uc788\ub2e4. \uadf8\ub9ac\uace0 \ud30c\ub3d9\uc774 \uc804\ub2ec\ud558\ub294 \uc5d0\ub108\uc9c0 \ubc00\ub3c4\ub294 \uc9c4\ud3ed\uc758 \uc81c\uacf1\uc5d0 \ube44\ub840\ud55c\ub2e4. \ubb3c\ub860 \uc6b0\ub9ac\uac00 \ub290\ub07c\ub294 \uc18c\ub9ac\uc758 \ud06c\uae30\ub3c4 \uc5d0\ub108\uc9c0 \ubc00\ub3c4\uc5d0 \uad00\uacc4\ub41c\ub2e4. \uadf8 \uad00\uacc4\uc2dd\uc774 \ubc14\ub85c \ub370\uc2dc\ubca8\uc774\ub2e4.<\/p>\n<p>        dB = 10log(A\/$r^2$) = 10log(A)-20log(r)<br \/>\n        <br \/>\n        \uc798 \ubcf4\uba74 \uc18c\ub9ac\uc758 \ud06c\uae30\uac00 \uac70\ub9ac\uc758 \ub85c\uadf8\uac12\uc5d0 \ub530\ub77c \uc904\uc5b4\ub4dc\ub294 \uac83\uc744 \ubcfc \uc218 \uc788\ub2e4.<br \/>\n        <br \/>\n        \ub9cc\uc57d r\uc774 3\ubc30\uac00 \ub41c\ub2e4\uba74<br \/>\n        <br \/>\n        dB = 10log(A)-20log(r) &#8211; 20log(3) = 10log(A)-20log(r) &#8211; 9.5<br \/>\n        <br \/>\n        \uc989, dB\uc5d0\uc11c 9.5\ub370\uc2dc\ubca8\uc774 \uc791\uc544\uc9c4 \uac83\uc744 \ubcfc \uc218 \uc788\ub2e4. \uc2e4\uc81c\ub85c \uc704\uc758 \uc2e4\ud5d8 \uacb0\uacfc\ub97c \ubcf4\uba74 \uac70\ub9ac\uac00 \uc57d 3\ubc30\uc778 \uacbd\uc6b0 9dB\uc774 \uc791\uc544\uc9c0\ub294 \uac83\uc744 \ud655\uc778\ud560 \uc218 \uc788\ub2e4.<\/p>\n<p>        \uc5ec\uae30\uc11c,<br \/>\n        <span style=\"font-weight: bold;\"><br \/>\n         \uc774 \uad00\uacc4\uc2dd\uc774 \ub9de\ub2e4\ub294 \uac83\uc740 \uc18c\ub9ac\uac00 \ud37c\uc9c4\ub2e4\ub294 \uac83\uc744 \uc758\ubbf8<br \/>\n        <\/span><br \/>\n        \ud55c\ub2e4. -_-;<\/p>\n<p><a href=\"http:\/\/news.chosun.com\/site\/data\/html_dir\/2010\/09\/28\/2010092801940.html\" target=\"_blank\" title=\"[http:\/\/news.chosun.com\/site\/data\/html_dir\/2010\/09\/28\/2010092801940.html]\ub85c \uc774\ub3d9\ud569\ub2c8\ub2e4.\"><br \/>\n         http:\/\/news.chosun.com\/site\/data\/html_dir\/2010\/09\/28\/2010092801940.html<br \/>\n        <\/a><br \/>\n<br \/>\n        \uc870\uc120\uc77c\ubcf4\uc5d0\uc11c &#8220;\ub808\uc774\uc800\ube54\ucc98\ub7fc&#8221; \uc9c4\ud589\ud55c\ub2e4\uace0 \ud588\ub294\ub370, \uc704\uc5d0\uc11c \ub0b4\uac00 \uc99d\uba85\ud55c \ubc14\uc640 \uac19\uc774 \uc774\uac74 \ubb3c\ub9ac\ud559\uc801\uc73c\ub85c \uc624\ub958\uc778 \ubcf4\ub3c4\uc774\ub2e4. (\uadf8 \uc870\uc120\uc77c\ubcf4 \uae30\uc790\uac00 \ubb3c\ub9ac\ud559 \uc804\uacf5\uc790\uc77c\ub9ac\ub294 \uc5c6\uace0, \ubb3c\ub9ac\ud559 \uc804\uacf5\uc790\ub77c\uace0 \ud574\ub3c4 \uae30\uc0ac\ub97c \ubb3c\ub9ac\uc801\uc73c\ub85c \uac80\ud1a0\ud574\uc11c \uc4f0\uc9c0\ub294 \uc54a\uc558\uaca0\uc9c0\ub9cc.)<\/p>\n<p>        \ub808\uc774\uc800\ube54\uc740 \uc218\uc2edkm\ub97c \uac00\ub354\ub77c\ub3c4<br \/>\n        <span style=\"font-weight: bold; background-color: rgb(92, 127, 176);\"><br \/>\n         \ub9ce\uc774<br \/>\n        <\/span><br \/>\n        \ud37c\uc9c0\uc9c0 \uc54a\ub294\ub2e4.<\/p>\n<p>        \uc74c\ud5a5\ub300\ud3ec\ub294 \uadf8\ub0e5 &#8220;\uc88b\uc740 \ud655\uc131\uae30&#8221; \uc815\ub3c4\uc758 \uc131\ub2a5\uc744 \uac16\ub294 \uac83 \uac19\ub2e4.<\/p>\n<p>        \uc74c\ud5a5\ub300\ud3ec\uac00 \uc9d1\ud68c \ud604\uc7a5\uc5d0 \uc2e4\uc81c\ub85c \ub3c4\uc785\ub418\uba74, \uadc0\ub9c8\uac1c \ucc29\uc6a9\uc790\uac00 \uc9d1\ud68c \ucc38\uac00 \ud604\ud589\ubc94\uc73c\ub85c \ubab0\ub9ac\ub294 \uc77c\uc774 \ubc1c\uc0dd\ud560 \uac83\uc774\ub2e4. (\uc544\ub9c8 \uc18c\uc9c0\ub9cc \ud574\ub3c4 \uac78\ub9b4 \ub4ef. \ub9c8\uc2a4\ud06c \uc4f0\uc9c0 \ub9d0\ub77c\uace0 \ud588\uc73c\ub2c8 \uadc0\ub9c8\uac1c\ub3c4 \uc4f0\uc9c0 \ub9d0\ub77c\uace0 \ud560\uac70\ub2e4.)<br \/>\n        <br \/>\n        \uadf8\ub9ac\uace0 3M \uc8fc\uc2dd\uc744 \uc0ac\ub450\uae38 \uad8c\ud55c\ub2e4. \uadc0\ub9c8\uac1c\ub294 3M \uc81c\ud488\uc774 \uc81c\uc77c \uc88b\ub354\ub77c.\u314b<\/p>\n<p>        \uadf8\ub9ac\uace0 \uc74c\ud5a5\ub300\ud3ec\uc5d0 \uc774\uc5b4 \ub3c4\uc785\ub420 \uc7a5\ube44\ub294 \ub808\uc774\uc800\ub97c \uc774\uc6a9\ud574 \ub208\ubd80\uc2dc\uac8c \ud574\uc11c \uc9d1\ud68c\ub97c \ud574\uc0b0\uc2dc\ud0a4\ub294 \uc2dc\uac01\uc801 \uc7a5\ube44\uac00 \ub420 \uac83\uc774\ub2e4. \uc65c\ub0d0\ud558\uba74 \uc2dc\uc704 \uc9c4\uc555 \uc7a5\ube44\uc758 \uc5ed\uc0ac\ub97c \ubcfc \ub54c, \ucd09\uac01(\uc9c4\uc555\ubd09)-\ud6c4\uac01(\ucd5c\ub8e8\ud0c4)-\uccad\uac01(\uc74c\ud5a5\ub300\ud3ec) \ub2e4\uc74c \uc21c\uc11c\ub294 \ubbf8\uac01 \uc544\ub2c8\uba74 \uc2dc\uac01\uc774\ub2e4. \ubbf8\uac01\uc740 \ub3c4\uc785\ub418\uae30 \ud798\ub4e4 \uac83 \uac19\uc740\ub370, \uadf8 \uc774\uc720\ub294 \uac15\uc81c\ub85c \ubb54\uac00 \uc9c4\uc9dc \ub9db\uc5c6\ub294\uac78 \ub9db\ubcf4\uac8c \ud574\uc11c \uc2dc\uc704\ub97c \uc9c4\uc555\ud55c\ub2e4\ub294 \uc0dd\uac01\uc740 \uc544\ubb34\ub9ac \uacbd\ucc30\uccad\uc7a5\uc774 \uc544\ubb34\ub9ac \uc544\ubb34\ub9ac \ubb34\uc2dd\ud574\ub3c4 \uadf8 \uc0dd\uac01\uc740 \uc815\ub9d0 \uc548\ud560 \uac83\uc774\ub77c\uace0 \ubcf4\uc5ec\uc9c0\uae30 \ub54c\ubb38\uc774\ub2e4.<br \/>\n        <\/p>\n<div style=\"width:100%;margin-top:30px;clear:both;height:30px\">\n<div style=\"width:31px;float:left;\">\n<a href=\"\/toolbar\/popup\/abuseReport\/?entryId=2090\" onclick=\"window.open(this.href, 'tistoryThisBlogPopup', 'width=550, height=510, toolbar=no, menubar=no, status=no, scrollbars=no'); return false;\"><br \/>\n<img data-recalc-dims=\"1\" decoding=\"async\" alt=\"\uc2e0\uace0\" src=\"https:\/\/i0.wp.com\/t1.daumcdn.net\/tistory_admin\/static\/ico\/ico_spam_report.png\" style=\"border:0\"\/><br \/>\n<\/a>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\uacbd\ucc30\uccad\uc7a5\uc774 \uc9d1\ud68c \ud574\uc0b0\uc744 \uc704\ud574 \uc74c\ud5a5\ub300\ud3ec\ub97c \uc0ac\uc6a9\ud558\uaca0\ub2e4\uace0 \ud588\ub2e4. \uadf8 \uc2e4\ud5d8\uacb0\uacfc\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4\uace0 \uc804\ud574\uc9c4\ub2e4. http:\/\/segye.com\/Articles\/News\/Society\/Article.asp?aid=20101001003142&#038;ctg1=01&#038;ctg2=00&#038;subctg1=01&#038;subctg2=00&#038;cid=0101080100000 100\ubbf8\ud130\uc5d0\uc11c 106dB 64\ubbf8\ud130\uc5d0\uc11c 109dB 32\ubbf8\ud130\uc5d0\uc11c 115dB \uac70\ub9ac\uac00 3\ubc30\ub098 \ub298\uc5b4\ub0ac\ub294\ub370 \ubcc4\ub85c \uc904\uc5b4\ub4e0 \uac83 \uac19\uc9c0 \uc54a\ub2e4. \uc65c \uadf8\ub7f4\uae4c? \ub370\uc2dc\ubca8(dB)\uc758 \uc815\uc758\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4. dB = 10log(A) \uc5ec\uae30\uc11c log\ub294 \ubc11\uc774 10\uc778 \uc0c1\uc6a9\ub85c\uadf8\uc774\ub2e4. \uc5d0\ub108\uc9c0 \ubc00\ub3c4A\uac00 \uc5bc\ub9c8\uc778\uc9c0\ub294 \ubaa8\ub974\uaca0\uc9c0\ub9cc, \uc544\ubb34\ud2bc \uc18c\ub9ac\uc5d0 \ub300\ud574\uc11c \uc5d0\ub108\uc9c0 \ubcf4\uc874\ubc95\uce59\uc774 \uc801\uc6a9\ub41c\ub2e4\uace0 \ud558\uba74, \uac00\uc6b0\uc2a4 \ubc95\uce59\uc744 \ub300\ucda9 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","_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":""},"categories":[2],"tags":[],"class_list":["post-9261","post","type-post","status-publish","format-standard","hentry","category-academic"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8o6gA-2pn","jetpack-related-posts":[],"jetpack_likes_enabled":true,"_links":{"self":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts\/9261","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9261"}],"version-history":[{"count":0,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts\/9261\/revisions"}],"wp:attachment":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9261"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9261"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9261"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}