{"id":4143,"date":"2020-04-23T09:35:52","date_gmt":"2020-04-23T09:35:52","guid":{"rendered":"https:\/\/thuvienxaydung.com.vn\/?p=4143"},"modified":"2020-04-23T09:37:57","modified_gmt":"2020-04-23T09:37:57","slug":"tieu-chuan-quoc-gia-tcvn-49231989-sev-1928-79-ve-phuong-tien-va-phuong-phap-chong-on-phan-loai","status":"publish","type":"post","link":"https:\/\/tailieuxaydung.net\/?p=4143","title":{"rendered":"Ti\u00eau chu\u1ea9n qu\u1ed1c gia TCVN 4923:1989 (SEV 1928-79) v\u1ec1 Ph\u01b0\u01a1ng ti\u1ec7n v\u00e0 ph\u01b0\u01a1ng ph\u00e1p ch\u1ed1ng \u1ed3n \u2013 Ph\u00e2n lo\u1ea1i"},"content":{"rendered":"
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TI\u00caU CHU\u1ea8N VI\u1ec6T NAM<\/b><\/p>\n

TCVN 4923 : 1989<\/b><\/p>\n

PH\u01af\u01a0NG TI\u1ec6N V\u00c0 PH\u01af\u01a0NG PH\u00c1P CH\u1ed0NG \u1ed2N \u2013 PH\u00c2N LO\u1ea0I<\/p>\n

Means and methods for deffence from noise \u2013 Classification<\/i><\/p>\n

Ti\u00eau chu\u1ea9n n\u00e0y quy \u0111\u1ecbnh vi\u1ec7c ph\u00e2n lo\u1ea1i c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n v\u00e0 ph\u01b0\u01a1ng ph\u00e1p ch\u1ed1ng \u1ed3n, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng t\u1ea1i ch\u1ed7 l\u00e0m vi\u1ec7c c\u1ee7a c\u00e1c c\u01a1 s\u1edf s\u1ea3n xu\u1ea5t, c\u00e1c nh\u00e0 m\u00e1y, v\u00f9ng d\u00e2n c\u01b0 v\u00e0 c\u00e1c c\u00f4ng tr\u00ecnh c\u00f4ng c\u1ed9ng.<\/p>\n

Ti\u00eau chu\u1ea9n n\u00e0y ho\u00e0n to\u00e0n ph\u00f9 h\u1ee3p v\u1edbi ti\u00eau chu\u1ea9n SEV 1928-79.<\/p>\n

1. Ph\u00e2n lo\u1ea1i c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n v\u00e0 ph\u01b0\u01a1ng ph\u00e1p ch\u1ed1ng \u1ed3n theo c\u00e1ch b\u1ea3o v\u1ec7<\/b><\/p>\n

\u2013 Ph\u01b0\u01a1ng ti\u1ec7n v\u00e0 ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o v\u1ec7 t\u1eadp th\u1ec3;<\/p>\n

\u2013 Ph\u01b0\u01a1ng ti\u1ec7n b\u1ea3o v\u1ec7 c\u00e1 nh\u00e2n;<\/p>\n

2. Ph\u00e2n lo\u1ea1i c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n b\u1ea3o v\u1ec7 t\u1eadp th\u1ec3 \u0111\u1ed1i v\u1edbi ngu\u1ed3n \u1ed3n<\/b><\/p>\n

\u2013 Ph\u01b0\u01a1ng ti\u1ec7n gi\u1ea3m ti\u1ebfng \u1ed3n t\u1ea1i ngu\u1ed3n;<\/p>\n

\u2013 Ph\u01b0\u01a1ng ti\u1ec7n gi\u1ea3m ti\u1ebfng \u1ed3n tr\u00ean \u0111\u01b0\u1eddng lan truy\u1ec1n.<\/p>\n

2.1. Ph\u00e2n lo\u1ea1i\u00a0 c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n gi\u1ea3m ti\u1ebfng \u1ed3n t\u1ea1i ngu\u1ed3n theo t\u00ednh ch\u1ea5t t\u00e1c \u0111\u1ed9ng l\u00ean ngu\u1ed3n<\/p>\n

\u2013 Ph\u01b0\u01a1ng ti\u1ec7n gi\u1ea3m ti\u1ebfng \u1ed3n t\u1ea1i n\u01a1i ph\u00e1t sinh;<\/p>\n

\u2013 Ph\u01b0\u01a1ng ti\u1ec7n gi\u1ea3m kh\u1ea3 n\u0103ng b\u1ee9c x\u1ea1 \u00e2m c\u1ee7a ngu\u1ed3n \u1ed3n.<\/p>\n

2.2. Ph\u00e2n lo\u1ea1i c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n gi\u1ea3m ti\u1ebfng \u1ed3n t\u1ea1i ngu\u1ed3n theo t\u00ednh ch\u1ea5t c\u1ee7a ngu\u1ed3n ph\u00e1t sinh (xem ph\u1ee5 l\u1ee5c)<\/p>\n

\u2013 Ph\u01b0\u01a1ng ti\u1ec7n gi\u1ea3m ti\u1ebfng \u1ed3n c\u01a1 kh\u00ed;<\/p>\n

\u2013 Ph\u01b0\u01a1ng ti\u1ec7n gi\u1ea3m ti\u1ebfng \u1ed3n kh\u00ed \u0111\u1ed9ng;<\/p>\n

\u2013 Ph\u01b0\u01a1ng ti\u1ec7n gi\u1ea3m ti\u1ebfng \u1ed3n \u0111i\u1ec7n t\u1eeb;<\/p>\n

\u2013 Ph\u01b0\u01a1ng ti\u1ec7n gi\u1ea3m ti\u1ebfng \u1ed3n th\u1ee7y \u0111\u1ed9ng.<\/p>\n

2.3. Ph\u00e2n lo\u1ea1i c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n gi\u1ea3m ti\u1ebfng \u1ed3n tr\u00ean \u0111\u01b0\u1eddng lan truy\u1ec1n (xem ph\u1ee5 l\u1ee5c)<\/p>\n

\u2013 Ph\u01b0\u01a1ng ti\u1ec7n gi\u1ea3m ti\u1ebfng \u1ed3n kh\u00f4ng kh\u00ed;<\/p>\n

\u2013 Ph\u01b0\u01a1ng ti\u1ec7n gi\u1ea3m ti\u1ebfng \u1ed3n k\u1ebft c\u1ea5u.<\/p>\n

3. Ph\u00e2n lo\u1ea1i c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n b\u1ea3o v\u1ec7 t\u1eadp th\u1ec3 t\u00f9y thu\u1ed9c v\u00e0o vi\u1ec7c s\u1eed d\u1ee5ng ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng ph\u1ee5<\/b><\/p>\n

\u2013 Ph\u01b0\u01a1ng ti\u00ean th\u1ee5 \u0111\u1ed9ng, kh\u00f4ng s\u1eed d\u1ee5ng ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng ph\u1ee5.<\/p>\n

\u2013 Ph\u01b0\u01a1ng ti\u1ec7n ch\u1ee7 \u0111\u1ed9ng, s\u1eed d\u1ee5ng ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng ph\u1ee5.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Thu\u1ed9c t\u00ednh TCVN TCVN4923:1989<\/th>\n<\/tr>\n<\/thead>\n
Lo\u1ea1i v\u0103n b\u1ea3n<\/td>\nTi\u00eau chu\u1ea9n Vi\u1ec7t Nam<\/a><\/td>\n<\/tr>\n
S\u1ed1 \/ k\u00fd hi\u1ec7u<\/td>\nTCVN4923:1989<\/td>\n<\/tr>\n
C\u01a1 quan ban h\u00e0nh<\/td>\nKh\u00f4ng x\u00e1c \u0111\u1ecbnh<\/td>\n<\/tr>\n
Ng\u01b0\u1eddi k\u00fd<\/td>\nKh\u00f4ng x\u00e1c \u0111\u1ecbnh<\/td>\n<\/tr>\n
Ng\u00e0y ban h\u00e0nh<\/td>\n<\/td>\n<\/tr>\n
Ng\u00e0y hi\u1ec7u l\u1ef1c<\/td>\n<\/td>\n<\/tr>\n
L\u0129nh v\u1ef1c<\/td>\nX\u00e2y d\u1ef1ng<\/td>\n<\/tr>\n
T\u00ecnh tr\u1ea1ng hi\u1ec7u l\u1ef1c<\/td>\nKh\u00f4ng x\u00e1c \u0111\u1ecbnh<\/td>\n<\/tr>\n
T\u1ea3i xu\u1ed1ng<\/td>\n<\/i> TCVN4923:1989<\/a><\/td>\n<\/tr>\n
M\u1eadt Kh\u1ea9u<\/td>\nC\u00e2u h\u1ecfi : <\/strong><\/em> Gi\u00e0n ph\u01a1i th\u00f4ng minh X\u1ebfp ngang \u0110\u00e0i loan HT-11 c\u00f3 gi\u00e1 b\u00e1n tr\u00ean website www.Chogianphoi.vn bao nhi\u00eau ?
\n\u0110\u00e1p \u00e1n:<\/strong> XXX0000 (7 k\u00fd t\u1ef1 s\u1ed1)<\/strong>\u00a0. Xem c\u00e1ch t\u1ea3i ph\u00eda d\u01b0\u1edbi.<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

TI\u00caU CHU\u1ea8N VI\u1ec6T NAM TCVN 4923 : 1989 PH\u01af\u01a0NG TI\u1ec6N V\u00c0 PH\u01af\u01a0NG PH\u00c1P CH\u1ed0NG \u1ed2N \u2013 PH\u00c2N LO\u1ea0I Means and methods for deffence from noise \u2013 Classification Ti\u00eau chu\u1ea9n n\u00e0y quy \u0111\u1ecbnh vi\u1ec7c ph\u00e2n lo\u1ea1i c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n v\u00e0 ph\u01b0\u01a1ng ph\u00e1p ch\u1ed1ng \u1ed3n, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng t\u1ea1i ch\u1ed7 l\u00e0m vi\u1ec7c c\u1ee7a c\u00e1c c\u01a1 s\u1edf s\u1ea3n…<\/p>\n","protected":false},"author":1,"featured_media":4145,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[42],"tags":[],"class_list":["post-4143","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tieu-chuan-xay-dung"],"_links":{"self":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/4143","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4143"}],"version-history":[{"count":4,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/4143\/revisions"}],"predecessor-version":[{"id":4148,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/4143\/revisions\/4148"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/media\/4145"}],"wp:attachment":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}