{"id":3756,"date":"2016-01-20T12:25:30","date_gmt":"2016-01-20T05:25:30","guid":{"rendered":"https:\/\/www.baohoxanh.com\/blog\/?p=3756"},"modified":"2026-09-02T18:58:31","modified_gmt":"2026-09-02T11:58:31","slug":"tai-nghe-chong-on-voi-nhung-tinh-nang-vuot-troi","status":"publish","type":"post","link":"https:\/\/www.baohoxanh.com\/blog\/tai-nghe-chong-on-voi-nhung-tinh-nang-vuot-troi\/","title":{"rendered":"Tai Nghe Ch\u1ed1ng \u1ed2n V\u1edbi Nh\u1eefng T\u00ednh N\u0103ng V\u01b0\u1ee3t Tr\u1ed9i"},"content":{"rendered":"<p><strong>Tai nghe ch\u1ed1ng \u1ed3n<\/strong> l\u00e0 thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 th\u00ednh l\u1ef1c b\u1eaft bu\u1ed9c t\u1ea1i c\u00e1c v\u1ecb tr\u00ed s\u1ea3n xu\u1ea5t c\u00f3 m\u1ee9c \u1ed3n v\u01b0\u1ee3t ng\u01b0\u1ee1ng cho ph\u00e9p, t\u1eeb x\u01b0\u1edfng d\u1eadp, nh\u00e0 m\u00e1y d\u1ec7t \u0111\u1ebfn c\u00f4ng tr\u01b0\u1eddng d\u00f9ng m\u00e1y kho\u00e9t b\u00ea t\u00f4ng. \u0110i\u1ec1u nhi\u1ec1u doanh nghi\u1ec7p ch\u01b0a n\u1eafm r\u00f5 l\u00e0 con s\u1ed1 gi\u1ea3m \u1ed3n in tr\u00ean bao b\u00ec kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ed1 dB th\u1ef1c t\u1ebf ng\u01b0\u1eddi lao \u0111\u1ed9ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7. B\u00e0i vi\u1ebft n\u00e0y gi\u1ea3i th\u00edch b\u1ed9 ti\u00eau chu\u1ea9n EN 352, c\u00e1ch \u0111\u1ecdc ch\u1ec9 s\u1ed1 SNR v\u00e0 NRR, \u0111\u1ed1i chi\u1ebfu v\u1edbi m\u1ee9c ti\u1ebfp x\u00fac cho ph\u00e9p theo QCVN 24:2016\/BYT v\u00e0 c\u00e1ch ch\u1ecdn \u0111\u00fang m\u1ee9c b\u1ea3o v\u1ec7.<\/p>\n<h2>Tai Nghe Ch\u1ed1ng \u1ed2n L\u00e0 G\u00ec? Ph\u00e2n Bi\u1ec7t Th\u1ee5 \u0110\u1ed9ng V\u00e0 Ch\u1ee7 \u0110\u1ed9ng<\/h2>\n<p>Trong b\u1ea3o h\u1ed9 lao \u0111\u1ed9ng, &#8220;tai nghe ch\u1ed1ng \u1ed3n&#8221; th\u01b0\u1eddng \u0111\u01b0\u1ee3c hi\u1ec3u l\u00e0 ch\u1ee5p tai (earmuff) \u2014 hai c\u1ee7 tai b\u1ecdc \u0111\u1ec7m x\u1ed1p \u00f4m k\u00edn v\u00e0nh tai, n\u1ed1i b\u1eb1ng g\u1ecdng \u0111\u1ed9i \u0111\u1ea7u. C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng chia th\u00e0nh hai nh\u00f3m:<\/p>\n<ul>\n<li><strong>Ch\u1ed1ng \u1ed3n th\u1ee5 \u0111\u1ed9ng:<\/strong> ch\u1eb7n s\u00f3ng \u00e2m b\u1eb1ng v\u1eadt l\u00fd \u2014 v\u1ecf c\u1ee9ng c\u00e1ch \u00e2m, l\u00f5i b\u00f4ng h\u00fat \u00e2m v\u00e0 \u0111\u1ec7m m\u00fat \u00f4m k\u00edn quanh tai. Kh\u00f4ng c\u1ea7n pin, \u0111\u1ed9 tin c\u1eady cao, l\u00e0 lo\u1ea1i \u0111\u01b0\u1ee3c d\u00f9ng ph\u1ed5 bi\u1ebfn nh\u1ea5t trong nh\u00e0 m\u00e1y.<\/li>\n<li><strong>Ch\u1ed1ng \u1ed3n ch\u1ee7 \u0111\u1ed9ng (\u0111i\u1ec7n t\u1eed):<\/strong> d\u00f9ng micro thu ti\u1ebfng \u1ed3n r\u1ed3i ph\u00e1t s\u00f3ng ng\u01b0\u1ee3c pha \u0111\u1ec3 tri\u1ec7t ti\u00eau, ho\u1eb7c t\u00edch h\u1ee3p ch\u1ee9c n\u0103ng nghe ch\u1ecdn l\u1ecdc gi\u00fap nghe \u0111\u01b0\u1ee3c gi\u1ecdng n\u00f3i, c\u00f2i b\u00e1o \u0111\u1ed9ng nh\u01b0ng v\u1eabn ch\u1eb7n ti\u1ebfng m\u00e1y. Ph\u00f9 h\u1ee3p v\u1ecb tr\u00ed c\u1ea7n giao ti\u1ebfp nhi\u1ec1u, nh\u01b0ng ph\u1ee5 thu\u1ed9c pin v\u00e0 chi ph\u00ed cao h\u01a1n.<\/li>\n<\/ul>\n<p>B\u00ean c\u1ea1nh ch\u1ee5p tai c\u00f2n c\u00f3 n\u00fat nh\u00e9t tai (earplug) \u2014 gi\u00e1 r\u1ebb, g\u1ecdn, ph\u00f9 h\u1ee3p m\u00f4i tr\u01b0\u1eddng n\u00f3ng \u1ea9m v\u00ec kh\u00f4ng g\u00e2y b\u00ed tai, nh\u01b0ng hi\u1ec7u qu\u1ea3 l\u1ec7 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o vi\u1ec7c \u0111\u1eb7t \u0111\u00fang v\u00e0o \u1ed1ng tai.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.baohoxanh.com\/blog\/wp-content\/uploads\/2015\/11\/op-tai-chong-on-je-201.jpg\" alt=\"\u1ed0p tai ch\u1ed1ng \u1ed3n m\u00e3 JE-201 d\u1ea1ng ch\u1ee5p tr\u00f9m k\u00edn v\u00e0nh tai\" loading=\"lazy\" width=\"1200\" height=\"1200\" title=\"\"><\/p>\n<h2>B\u1ed9 Ti\u00eau Chu\u1ea9n EN 352 V\u00e0 C\u00e1c Ch\u1ec9 S\u1ed1 C\u1ea7n \u0110\u1ecdc<\/h2>\n<p>EN 352 l\u00e0 b\u1ed9 ti\u00eau chu\u1ea9n ch\u00e2u \u00c2u cho ph\u01b0\u01a1ng ti\u1ec7n b\u1ea3o v\u1ec7 th\u00ednh l\u1ef1c, chia theo t\u1eebng ki\u1ec3u s\u1ea3n ph\u1ea9m:<\/p>\n<ul>\n<li><strong>EN 352-1:<\/strong> ch\u1ee5p tai \u0111\u1ed9i \u0111\u1ea7u th\u00f4ng th\u01b0\u1eddng.<\/li>\n<li><strong>EN 352-2:<\/strong> n\u00fat nh\u00e9t tai c\u00e1c lo\u1ea1i.<\/li>\n<li><strong>EN 352-3:<\/strong> ch\u1ee5p tai g\u1eafn v\u00e0o r\u00e3nh b\u00ean c\u1ee7a m\u0169 b\u1ea3o h\u1ed9. Ch\u1ee9ng nh\u1eadn theo m\u1ee5c n\u00e0y g\u1eafn li\u1ec1n v\u1edbi danh s\u00e1ch m\u0169 c\u1ee5 th\u1ec3 \u0111\u00e3 th\u1eed k\u00e8m, n\u00ean l\u1eafp sang m\u0169 kh\u00e1c th\u00ec con s\u1ed1 gi\u1ea3m \u1ed3n c\u00f4ng b\u1ed1 kh\u00f4ng c\u00f2n hi\u1ec7u l\u1ef1c.<\/li>\n<\/ul>\n<h3>SNR \u2014 Ch\u1ec9 S\u1ed1 Gi\u1ea3m \u1ed2n \u0110\u01a1n S\u1ed1 Theo Ch\u00e2u \u00c2u<\/h3>\n<p>SNR (Single Number Rating) l\u00e0 m\u1ee9c gi\u1ea3m \u1ed3n trung b\u00ecnh t\u00ednh theo ph\u01b0\u01a1ng ph\u00e1p EN 352, th\u01b0\u1eddng n\u1eb1m trong kho\u1ea3ng 20\u201337 dB. C\u00e0ng cao th\u00ec kh\u1ea3 n\u0103ng c\u00e1ch \u00e2m c\u00e0ng l\u1edbn, nh\u01b0ng ch\u1ec9 s\u1ed1 n\u00e0y \u0111\u01b0\u1ee3c \u0111o trong ph\u00f2ng th\u00ed nghi\u1ec7m v\u1edbi ng\u01b0\u1eddi \u0111eo \u0111\u00fang chu\u1ea9n.<\/p>\n<h3>NRR \u2014 Ch\u1ec9 S\u1ed1 Theo Chu\u1ea9n M\u1ef9 V\u00e0 C\u00e1ch Tr\u1eeb Hao<\/h3>\n<p>NRR (Noise Reduction Rating) theo ANSI S3.19 l\u00e0 ch\u1ec9 s\u1ed1 quen thu\u1ed9c tr\u00ean s\u1ea3n ph\u1ea9m 3M v\u00e0 Honeywell, ph\u1ed5 bi\u1ebfn t\u1eeb 15\u201333 dB. \u0110\u1ec3 \u01b0\u1edbc l\u01b0\u1ee3ng m\u1ee9c \u1ed3n th\u1ef1c t\u1ebf t\u1edbi tai, c\u00e1ch tr\u1eeb hao 50% do OSHA h\u01b0\u1edbng d\u1eabn \u0111\u01b0\u1ee3c d\u00f9ng r\u1ed9ng r\u00e3i:<\/p>\n<p><strong>M\u1ee9c \u1ed3n c\u00f2n l\u1ea1i = M\u1ee9c \u1ed3n m\u00f4i tr\u01b0\u1eddng \u2212 (NRR \u2212 7) \/ 2<\/strong><\/p>\n<p>V\u00ed d\u1ee5 v\u1edbi ch\u1ee5p tai 3M H9A c\u00f3 NRR 25 dB d\u00f9ng trong x\u01b0\u1edfng \u1ed3n 100 dB: m\u1ee9c c\u00f2n l\u1ea1i \u2248 100 \u2212 (25 \u2212 7)\/2 = 91 dB \u2014 v\u1eabn v\u01b0\u1ee3t ng\u01b0\u1ee1ng 85 dBA cho ca 8 gi\u1edd. \u0110\u00e2y l\u00e0 l\u00fd do kh\u00f4ng \u0111\u01b0\u1ee3c l\u1ea5y th\u1eb3ng con s\u1ed1 tr\u00ean nh\u00e3n tr\u1eeb v\u00e0o m\u1ee9c \u1ed3n \u0111o \u0111\u01b0\u1ee3c.<\/p>\n<h3>HML \u2014 Ph\u00e2n T\u00edch Theo D\u1ea3i T\u1ea7n<\/h3>\n<p>M\u1ed9t s\u1ed1 s\u1ea3n ph\u1ea9m c\u00f4ng b\u1ed1 th\u00eam b\u1ed9 ba gi\u00e1 tr\u1ecb H (t\u1ea7n cao), M (t\u1ea7n trung), L (t\u1ea7n th\u1ea5p). Th\u00f4ng s\u1ed1 n\u00e0y h\u1eefu \u00edch khi ngu\u1ed3n \u1ed3n l\u1ec7ch h\u1eb3n v\u1ec1 m\u1ed9t d\u1ea3i \u2014 ti\u1ebfng m\u00e1y n\u00e9n kh\u00ed \u1ee7 tr\u1ea7m thu\u1ed9c t\u1ea7n th\u1ea5p, ti\u1ebfng m\u00e0i c\u1eaft kim lo\u1ea1i thu\u1ed9c t\u1ea7n cao \u2014 v\u00e0 hai lo\u1ea1i n\u00e0y \u0111\u00f2i h\u1ecfi c\u1ea5u tr\u00fac \u0111\u1ec7m tai kh\u00e1c nhau.<\/p>\n<h2>M\u1ee9c Ti\u1ebfp X\u00fac \u1ed2n Cho Ph\u00e9p Theo QCVN 24:2016\/BYT<\/h2>\n<p>Quy chu\u1ea9n k\u1ef9 thu\u1eadt qu\u1ed1c gia QCVN 24:2016\/BYT quy \u0111\u1ecbnh m\u1ee9c ti\u1ebfp x\u00fac ti\u1ebfng \u1ed3n cho ph\u00e9p t\u1ea1i n\u01a1i l\u00e0m vi\u1ec7c gi\u1ea3m d\u1ea7n theo th\u1eddi gian ti\u1ebfp x\u00fac:<\/p>\n<table>\n<thead>\n<tr>\n<th>Th\u1eddi gian ti\u1ebfp x\u00fac<\/th>\n<th>M\u1ee9c cho ph\u00e9p (dBA)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>8 gi\u1edd<\/td>\n<td>85<\/td>\n<\/tr>\n<tr>\n<td>4 gi\u1edd<\/td>\n<td>88<\/td>\n<\/tr>\n<tr>\n<td>2 gi\u1edd<\/td>\n<td>91<\/td>\n<\/tr>\n<tr>\n<td>1 gi\u1edd<\/td>\n<td>94<\/td>\n<\/tr>\n<tr>\n<td>30 ph\u00fat<\/td>\n<td>97<\/td>\n<\/tr>\n<tr>\n<td>15 ph\u00fat<\/td>\n<td>100<\/td>\n<\/tr>\n<tr>\n<td>7 ph\u00fat<\/td>\n<td>103<\/td>\n<\/tr>\n<tr>\n<td>3 ph\u00fat<\/td>\n<td>106<\/td>\n<\/tr>\n<tr>\n<td>1 ph\u00fat<\/td>\n<td>112<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Nguy\u00ean t\u1eafc d\u1ec5 nh\u1edb: c\u1ee9 t\u0103ng 3 dBA th\u00ec th\u1eddi gian ti\u1ebfp x\u00fac cho ph\u00e9p gi\u1ea3m m\u1ed9t n\u1eeda. Quy chu\u1ea9n c\u0169ng n\u00eau r\u00f5 m\u1ee9c \u00e2m c\u1ef1c \u0111\u1ea1i t\u1ea1i m\u1ecdi th\u1eddi \u0111i\u1ec3m kh\u00f4ng \u0111\u01b0\u1ee3c v\u01b0\u1ee3t 115 dBA. \u0110\u00e2y ch\u00ednh l\u00e0 c\u0103n c\u1ee9 \u0111\u1ec3 ch\u1ecdn m\u1ee9c b\u1ea3o v\u1ec7 c\u1ea7n thi\u1ebft cho t\u1eebng v\u1ecb tr\u00ed l\u00e0m vi\u1ec7c, thay v\u00ec ch\u1ecdn theo c\u1ea3m t\u00ednh.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.baohoxanh.com\/blog\/wp-content\/uploads\/2016\/03\/nut-tai-chong-on-malaysia-ep-1363-bvt0003_1.jpg\" alt=\"N\u00fat tai ch\u1ed1ng \u1ed3n EP-1363 c\u00f3 d\u00e2y n\u1ed1i, ph\u00f9 h\u1ee3p m\u00f4i tr\u01b0\u1eddng n\u00f3ng \u1ea9m v\u00e0 kh\u00f4ng gian ch\u1eadt\" loading=\"lazy\" width=\"500\" height=\"500\" title=\"\"><\/p>\n<p>Ch\u1ecdn \u0111\u00fang ch\u1ec9 s\u1ed1 m\u1edbi l\u00e0 n\u1eeda vi\u1ec7c; n\u1eeda c\u00f2n l\u1ea1i l\u00e0 ch\u1ee9ng minh n\u00f3 c\u00f3 t\u00e1c d\u1ee5ng tr\u00ean tai ng\u01b0\u1eddi th\u1eadt. <a href=\"https:\/\/www.osha.gov\/laws-regs\/regulations\/standardnumber\/1910\/1910.95\" target=\"_blank\" rel=\"noopener nofollow\">\u0110i\u1ec1u 29 CFR 1910.95 v\u1ec1 ph\u01a1i nhi\u1ec5m ti\u1ebfng \u1ed3n ngh\u1ec1 nghi\u1ec7p<\/a> g\u1eafn ng\u01b0\u1ee1ng 85 dBA trung b\u00ecnh ca t\u00e1m gi\u1edd v\u1edbi m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh theo d\u00f5i b\u1eaft bu\u1ed9c: l\u1eadp th\u00ednh l\u1ef1c \u0111\u1ed3 n\u1ec1n trong s\u00e1u th\u00e1ng \u0111\u1ea7u k\u1ec3 t\u1eeb khi ng\u01b0\u1eddi lao \u0111\u1ed9ng b\u1eaft \u0111\u1ea7u ph\u01a1i nhi\u1ec5m, \u0111o l\u1ea1i h\u1eb1ng n\u0103m, v\u00e0 coi m\u1ee9c d\u1ecbch trung b\u00ecnh t\u1eeb 10 dB tr\u1edf l\u00ean t\u1ea1i ba t\u1ea7n s\u1ed1 2000, 3000 v\u00e0 4000 Hz l\u00e0 d\u1ea5u hi\u1ec7u ph\u1ea3i can thi\u1ec7p. K\u1ebft qu\u1ea3 \u0111o c\u1ee7a n\u0103m sau ch\u00ednh l\u00e0 b\u1eb1ng ch\u1ee9ng cho bi\u1ebft chi\u1ebfc ch\u1ee5p tai \u0111\u01b0\u1ee3c ch\u1ecdn c\u00f3 th\u1ef1c s\u1ef1 v\u1eeba hay kh\u00f4ng, th\u1ee9 m\u00e0 kh\u00f4ng con s\u1ed1 SNR n\u00e0o in tr\u00ean h\u1ed9p tr\u1ea3 l\u1eddi thay \u0111\u01b0\u1ee3c.<\/p>\n<h2>Ch\u1ecdn Tai Nghe Ch\u1ed1ng \u1ed2n Theo M\u1ee9c \u1ed2n Th\u1ef1c T\u1ebf<\/h2>\n<p>Sau khi \u0111o m\u1ee9c \u1ed3n t\u1ea1i v\u1ecb tr\u00ed l\u00e0m vi\u1ec7c, c\u00f3 th\u1ec3 \u0111\u1ecbnh h\u01b0\u1edbng nh\u01b0 sau:<\/p>\n<ul>\n<li><strong>D\u01b0\u1edbi 85 dBA:<\/strong> ch\u1ec9 c\u1ea7n m\u1ee9c b\u1ea3o v\u1ec7 nh\u1eb9 (SNR\/NRR kho\u1ea3ng 15\u201320 dB), \u01b0u ti\u00ean n\u00fat nh\u00e9t tai \u0111\u1ec3 kh\u00f4ng c\u1ea3n tr\u1edf giao ti\u1ebfp.<\/li>\n<li><strong>85\u201395 dBA:<\/strong> m\u1ee9c b\u1ea3o v\u1ec7 trung b\u00ecnh 25\u201330 dB \u2014 nh\u00f3m ch\u1ee5p tai nh\u01b0 3M H9A (NRR 25), Howard Leight L2 (27 dB) hay Delta Plus HB-640Y (28 dB) ph\u00f9 h\u1ee3p.<\/li>\n<li><strong>Tr\u00ean 95 dBA:<\/strong> c\u1ea7n m\u1ee9c 30\u201337 dB, ho\u1eb7c k\u1ebft h\u1ee3p \u0111\u1ed3ng th\u1eddi n\u00fat tai v\u00e0 ch\u1ee5p tai. Nh\u00f3m n\u00fat tai hi\u1ec7u su\u1ea5t cao nh\u01b0 FEP 03 (37 dB) hay Deltaplus Conic200 (NRR 32, SNR 37) th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng l\u00e0m l\u1edbp trong.<\/li>\n<\/ul>\n<p><strong>Tr\u00e1nh b\u1ea3o v\u1ec7 qu\u00e1 m\u1ee9c:<\/strong> ch\u1ecdn ch\u1ec9 s\u1ed1 qu\u00e1 cao so v\u1edbi m\u00f4i tr\u01b0\u1eddng khi\u1ebfn ng\u01b0\u1eddi lao \u0111\u1ed9ng kh\u00f4ng nghe \u0111\u01b0\u1ee3c c\u00f2i b\u00e1o \u0111\u1ed9ng, ti\u1ebfng xe n\u00e2ng hay hi\u1ec7u l\u1ec7nh \u0111\u1ed3ng \u0111\u1ed9i \u2014 h\u1ecd s\u1ebd t\u1ef1 th\u00e1o ra, v\u00e0 khi \u0111\u00f3 m\u1ee9c b\u1ea3o v\u1ec7 th\u1ef1c t\u1ebf b\u1eb1ng kh\u00f4ng. M\u1ee9c \u1ed3n c\u00f2n l\u1ea1i t\u1ea1i tai n\u00ean n\u1eb1m trong kho\u1ea3ng 75\u201380 dBA l\u00e0 h\u1ee3p l\u00fd.<\/p>\n<p>V\u1edbi v\u1ecb tr\u00ed b\u1eaft bu\u1ed9c \u0111\u1ed9i m\u0169 c\u1ee9ng, n\u00ean ch\u1ecdn ch\u1ee5p tai chu\u1ea9n EN 352-3 g\u1eafn tr\u1ef1c ti\u1ebfp v\u00e0o r\u00e3nh <a href=\"https:\/\/www.baohoxanh.com\/non-bao-ho\">n\u00f3n b\u1ea3o h\u1ed9 lao \u0111\u1ed9ng<\/a> thay v\u00ec ch\u1ee5p tai \u0111\u1ed9i \u0111\u1ea7u, v\u00ec g\u1ecdng \u0111\u1ed9i \u0111\u1ea7u b\u1ecb m\u0169 \u0111\u1ea9y l\u00ean s\u1ebd h\u1edf \u0111\u1ec7m tai v\u00e0 m\u1ea5t k\u00edn kh\u00ed.<\/p>\n<h2>\u0110eo \u0110\u00fang C\u00e1ch \u2014 Nh\u1eefng Sai L\u1ea7m L\u00e0m M\u1ea5t Hi\u1ec7u Qu\u1ea3<\/h2>\n<p>Hi\u1ec7u qu\u1ea3 c\u00e1ch \u00e2m ph\u1ee5 thu\u1ed9c tr\u01b0\u1edbc h\u1ebft v\u00e0o \u0111\u1ed9 k\u00edn gi\u1eefa \u0111\u1ec7m tai v\u00e0 da \u0111\u1ea7u. Ch\u1ec9 c\u1ea7n m\u1ed9t khe h\u1edf nh\u1ecf, m\u1ee9c gi\u1ea3m \u1ed3n th\u1ef1c t\u1ebf c\u00f3 th\u1ec3 t\u1ee5t h\u01a1n 10 dB. C\u00e1c l\u1ed7i th\u01b0\u1eddng g\u1eb7p:<\/p>\n<ul>\n<li>\u0110eo ch\u1ee5p tai \u0111\u00e8 l\u00ean g\u1ecdng k\u00ednh d\u00e0y ho\u1eb7c kh\u1ea9u trang c\u00f3 quai to l\u00e0m h\u1edf \u0111\u1ec7m.<\/li>\n<li>T\u00f3c d\u00e0i, m\u0169 v\u1ea3i, kh\u0103n tr\u00f9m l\u1ecdt v\u00e0o gi\u1eefa \u0111\u1ec7m v\u00e0 da.<\/li>\n<li>N\u1edbi g\u1ecdng qu\u00e1 r\u1ed9ng cho &#8220;\u0111\u1ee1 k\u1eb9p&#8221;, l\u00e0m gi\u1ea3m l\u1ef1c \u00e9p c\u1ea7n thi\u1ebft.<\/li>\n<li>N\u00fat nh\u00e9t tai kh\u00f4ng v\u00ea x\u1ecfn tr\u01b0\u1edbc khi \u0111\u01b0a v\u00e0o, ch\u1ec9 \u0111\u1eb7t h\u1edd \u1edf c\u1eeda \u1ed1ng tai n\u00ean g\u1ea7n nh\u01b0 kh\u00f4ng c\u00f3 t\u00e1c d\u1ee5ng.<\/li>\n<li>Th\u00e1o ra li\u00ean t\u1ee5c trong ca \u2014 ch\u1ec9 c\u1ea7n th\u00e1o 15 ph\u00fat trong ca 8 gi\u1edd \u1edf m\u00f4i tr\u01b0\u1eddng \u1ed3n cao, hi\u1ec7u qu\u1ea3 b\u1ea3o v\u1ec7 c\u1ea3 ca \u0111\u00e3 gi\u1ea3m \u0111\u00e1ng k\u1ec3.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/www.baohoxanh.com\/blog\/wp-content\/uploads\/2016\/03\/op-tai-chong-on-pc-03em.jpg\" alt=\"\u1ed0p tai ch\u1ed1ng \u1ed3n PC-03EM c\u00f3 \u0111\u1ec7m tai th\u00e1o r\u1eddi \u0111\u01b0\u1ee3c \u0111\u1ec3 v\u1ec7 sinh v\u00e0 thay th\u1ebf\" loading=\"lazy\" width=\"500\" height=\"500\" title=\"\"><\/p>\n<h2>V\u1ec7 Sinh, Thay \u0110\u1ec7m V\u00e0 B\u1ea3o Qu\u1ea3n<\/h2>\n<ul>\n<li>Lau \u0111\u1ec7m tai b\u1eb1ng kh\u0103n \u1ea9m v\u00e0 x\u00e0 ph\u00f2ng trung t\u00ednh sau m\u1ed7i ca; kh\u00f4ng d\u00f9ng c\u1ed3n hay dung m\u00f4i v\u00ec l\u00e0m c\u1ee9ng v\u00e0 n\u1ee9t l\u1edbp PVC.<\/li>\n<li>Thay \u0111\u1ec7m tai theo khuy\u1ebfn c\u00e1o nh\u00e0 s\u1ea3n xu\u1ea5t, th\u00f4ng th\u01b0\u1eddng 6\u201312 th\u00e1ng ho\u1eb7c s\u1edbm h\u01a1n khi \u0111\u1ec7m ch\u1ea1i c\u1ee9ng, x\u1eb9p, r\u1ea1n \u2014 \u0111\u1ec7m ch\u00ednh l\u00e0 b\u1ed9 ph\u1eadn quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 k\u00edn.<\/li>\n<li>Kh\u00f4ng treo ch\u1ee5p tai ngo\u00e0i n\u1eafng ho\u1eb7c \u0111\u1ec3 trong cabin xe \u0111\u00f3ng k\u00edn \u2014 nhi\u1ec7t cao l\u00e0m l\u00e3o h\u00f3a m\u00fat h\u00fat \u00e2m.<\/li>\n<li>V\u1edbi lo\u1ea1i \u0111i\u1ec7n t\u1eed d\u00f9ng pin r\u1eddi, th\u00e1o pin khi ngh\u1ec9 d\u00e0i ng\u00e0y \u0111\u1ec3 tr\u00e1nh r\u00f2 r\u1ec9 h\u1ecfng b\u1ea3ng m\u1ea1ch; tr\u00e1nh l\u00e0m r\u01a1i v\u00ec linh ki\u1ec7n b\u00ean trong kh\u00f3 s\u1eeda ch\u1eefa.<\/li>\n<li>N\u00fat tai d\u00f9ng m\u1ed9t l\u1ea7n kh\u00f4ng t\u00e1i s\u1eed d\u1ee5ng; n\u00fat silicone c\u00f3 d\u00e2y n\u1ed1i c\u1ea7n r\u1eeda s\u1ea1ch v\u00e0 \u0111\u1ec3 kh\u00f4 tr\u01b0\u1edbc khi c\u1ea5t v\u00e0o h\u1ed9p.<\/li>\n<\/ul>\n<p>M\u1ed9t l\u01b0u \u00fd an to\u00e0n kh\u00e1c: kh\u00f4ng \u0111eo tai nghe ch\u1ed1ng \u1ed3n khi \u0111i \u0111\u01b0\u1eddng ho\u1eb7c \u1edf khu v\u1ef1c c\u00f3 xe n\u00e2ng, xe t\u1ea3i di chuy\u1ec3n m\u00e0 kh\u00f4ng c\u00f3 ng\u01b0\u1eddi c\u1ea3nh gi\u1edbi, v\u00ec m\u1ea5t kh\u1ea3 n\u0103ng \u0111\u1ecbnh h\u01b0\u1edbng \u00e2m thanh c\u1ea3nh b\u00e1o.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.baohoxanh.com\/blog\/wp-content\/uploads\/2016\/05\/nut-bit-tai-chong-on-fep-03-malaysia-bvt0004_1.jpg\" alt=\"N\u00fat b\u1ecbt tai ch\u1ed1ng \u1ed3n FEP-03 lo\u1ea1i d\u00f9ng m\u1ed9t l\u1ea7n, c\u1ea5p ph\u00e1t theo ca cho c\u00f4ng nh\u00e2n\" loading=\"lazy\" width=\"500\" height=\"500\" title=\"\"><\/p>\n<h2>L\u01b0u \u00dd Khi Mua Tai Nghe Ch\u1ed1ng \u1ed2n Cho Doanh Nghi\u1ec7p<\/h2>\n<ul>\n<li>Y\u00eau c\u1ea7u th\u00f4ng s\u1ed1 SNR ho\u1eb7c NRR c\u00f4ng b\u1ed1 tr\u00ean bao b\u00ec g\u1ed1c, k\u00e8m ti\u00eau chu\u1ea9n \u00e1p d\u1ee5ng (EN 352-1\/-2\/-3 ho\u1eb7c ANSI S3.19).<\/li>\n<li>\u0110\u1ed1i chi\u1ebfu ch\u1ec9 s\u1ed1 v\u1edbi k\u1ebft qu\u1ea3 quan tr\u1eafc m\u00f4i tr\u01b0\u1eddng lao \u0111\u1ed9ng th\u1ef1c t\u1ebf c\u1ee7a nh\u00e0 m\u00e1y, kh\u00f4ng ch\u1ecdn theo m\u1eabu chung cho m\u1ecdi v\u1ecb tr\u00ed.<\/li>\n<li>Ch\u1ecdn t\u1ed1i thi\u1ec3u hai ph\u01b0\u01a1ng \u00e1n cho m\u1ed7i v\u1ecb tr\u00ed (m\u1ed9t ch\u1ee5p tai, m\u1ed9t n\u00fat tai) \u0111\u1ec3 ng\u01b0\u1eddi lao \u0111\u1ed9ng ch\u1ecdn lo\u1ea1i \u0111eo tho\u1ea3i m\u00e1i \u2014 t\u1ef7 l\u1ec7 tu\u00e2n th\u1ee7 t\u0103ng r\u00f5 r\u1ec7t.<\/li>\n<li>D\u1ef1 tr\u00f9 s\u1eb5n \u0111\u1ec7m tai thay th\u1ebf c\u00f9ng model \u0111\u1ec3 kh\u00f4ng ph\u1ea3i b\u1ecf c\u1ea3 b\u1ed9 khi \u0111\u1ec7m xu\u1ed1ng c\u1ea5p.<\/li>\n<\/ul>\n<p>B\u1ea3o H\u1ed9 Xanh cung c\u1ea5p \u0111\u1ea7y \u0111\u1ee7 nh\u00f3m <a href=\"https:\/\/www.baohoxanh.com\/bao-ho-tai\">thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 th\u00ednh l\u1ef1c<\/a> t\u1eeb nhi\u1ec1u th\u01b0\u01a1ng hi\u1ec7u nh\u01b0 3M, Honeywell, Delta Plus, bao g\u1ed3m d\u00f2ng <a href=\"https:\/\/www.baohoxanh.com\/bit-tai-chong-on\">ch\u1ee5p tai ch\u1ed1ng \u1ed3n<\/a> \u0111\u1ed9i \u0111\u1ea7u v\u00e0 g\u1eafn m\u0169, c\u00f9ng d\u00f2ng <a href=\"https:\/\/www.baohoxanh.com\/nut-tai-chong-on\">n\u00fat tai ch\u1ed1ng \u1ed3n<\/a> d\u00f9ng m\u1ed9t l\u1ea7n v\u00e0 t\u00e1i s\u1eed d\u1ee5ng, k\u00e8m t\u01b0 v\u1ea5n ch\u1ecdn m\u1ee9c b\u1ea3o v\u1ec7 theo s\u1ed1 li\u1ec7u \u0111o \u1ed3n c\u1ee7a t\u1eebng x\u01b0\u1edfng.<\/p>\n<h2>V\u00ec Sao Ch\u1ec9 S\u1ed1 SNR Tr\u00ean Bao B\u00ec Kh\u00f4ng Ph\u1ea3i S\u1ed1 dB Th\u1ef1c Nh\u1eadn<\/h2>\n<h3>SNR 30 dB C\u00f3 Ngh\u0129a L\u00e0 Gi\u1ea3m \u0110\u00fang 30 dB Kh\u00f4ng?<\/h3>\n<p>Kh\u00f4ng. \u0110\u00f3 l\u00e0 gi\u00e1 tr\u1ecb \u0111o trong ph\u00f2ng th\u00ed nghi\u1ec7m khi \u0111eo ho\u00e0n h\u1ea3o. Th\u1ef1c t\u1ebf s\u1ebd th\u1ea5p h\u01a1n do \u0111\u1ed9 k\u00edn kh\u00f4ng tuy\u1ec7t \u0111\u1ed1i, n\u00ean c\u1ea7n tr\u1eeb hao 50% theo h\u01b0\u1edbng d\u1eabn c\u1ee7a OSHA khi t\u00ednh to\u00e1n m\u1ee9c ph\u01a1i nhi\u1ec5m.<\/p>\n<h3>\u0110eo \u0110\u1ed3ng Th\u1eddi N\u00fat Tai V\u00e0 Ch\u1ee5p Tai C\u00f3 C\u1ed9ng D\u1ed3n Ch\u1ec9 S\u1ed1 Kh\u00f4ng?<\/h3>\n<p>Kh\u00f4ng c\u1ed9ng th\u1eb3ng. K\u1ebft h\u1ee3p hai l\u1edbp th\u01b0\u1eddng ch\u1ec9 t\u0103ng th\u00eam kho\u1ea3ng 5\u201310 dB so v\u1edbi l\u1edbp t\u1ed1t h\u01a1n, do gi\u1edbi h\u1ea1n truy\u1ec1n \u00e2m qua x\u01b0\u01a1ng s\u1ecd. D\u00f9 v\u1eady \u0111\u00e2y v\u1eabn l\u00e0 gi\u1ea3i ph\u00e1p c\u1ea7n thi\u1ebft \u1edf m\u00f4i tr\u01b0\u1eddng r\u1ea5t \u1ed3n.<\/p>\n<h3>Ch\u1ee5p Tai Hay N\u00fat Tai T\u1ed1t H\u01a1n?<\/h3>\n<p>Ch\u1ee5p tai d\u1ec5 \u0111eo \u0111\u00fang, d\u1ec5 ki\u1ec3m tra b\u1eb1ng m\u1eaft v\u00e0 ph\u00f9 h\u1ee3p ca lu\u00e2n phi\u00ean; n\u00fat tai g\u1ecdn, m\u00e1t, h\u1ee3p m\u00f4i tr\u01b0\u1eddng n\u00f3ng \u1ea9m ho\u1eb7c kh\u00f4ng gian ch\u1eadt. Nhi\u1ec1u nh\u00e0 m\u00e1y trang b\u1ecb c\u1ea3 hai theo t\u1eebng v\u1ecb tr\u00ed c\u00f4ng vi\u1ec7c.<\/p>\n<h3>Bao L\u00e2u Ph\u1ea3i Thay Ch\u1ee5p Tai M\u1edbi?<\/h3>\n<p>Ph\u1ea7n v\u1ecf c\u00f3 th\u1ec3 d\u00f9ng nhi\u1ec1u n\u0103m, nh\u01b0ng \u0111\u1ec7m tai n\u00ean thay \u0111\u1ecbnh k\u1ef3 6\u201312 th\u00e1ng. Thay ngay khi \u0111\u1ec7m c\u1ee9ng, x\u1eb9p, r\u1ea1n ho\u1eb7c g\u1ecdng m\u1ea5t \u0111\u00e0n h\u1ed3i kh\u00f4ng c\u00f2n \u00e9p \u0111\u1ee7 v\u00e0o \u0111\u1ea7u.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u00e1ch \u0111\u1ecdc SNR v\u00e0 NRR, ph\u00e9p tr\u1eeb hao 50% c\u1ee7a OSHA, b\u1ea3ng m\u1ee9c ti\u1ebfp x\u00fac theo QCVN 24:2016\/BYT v\u00e0 c\u00e1ch ch\u1ecdn m\u1ee9c b\u1ea3o v\u1ec7 v\u1eeba \u0111\u1ee7 cho t\u1eebng v\u1ecb tr\u00ed l\u00e0m vi\u1ec7c.<\/p>\n","protected":false},"author":969,"featured_media":3771,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6934],"tags":[119,444,445],"class_list":["post-3756","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-xoa-gsc","tag-bit-tai-chong-on","tag-tai-nghe-chong-on","tag-thiet-bi-bao-ho-tai"],"_links":{"self":[{"href":"https:\/\/www.baohoxanh.com\/blog\/wp-json\/wp\/v2\/posts\/3756","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.baohoxanh.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.baohoxanh.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.baohoxanh.com\/blog\/wp-json\/wp\/v2\/users\/969"}],"replies":[{"embeddable":true,"href":"https:\/\/www.baohoxanh.com\/blog\/wp-json\/wp\/v2\/comments?post=3756"}],"version-history":[{"count":30,"href":"https:\/\/www.baohoxanh.com\/blog\/wp-json\/wp\/v2\/posts\/3756\/revisions"}],"predecessor-version":[{"id":93141,"href":"https:\/\/www.baohoxanh.com\/blog\/wp-json\/wp\/v2\/posts\/3756\/revisions\/93141"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.baohoxanh.com\/blog\/wp-json\/wp\/v2\/media\/3771"}],"wp:attachment":[{"href":"https:\/\/www.baohoxanh.com\/blog\/wp-json\/wp\/v2\/media?parent=3756"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.baohoxanh.com\/blog\/wp-json\/wp\/v2\/categories?post=3756"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.baohoxanh.com\/blog\/wp-json\/wp\/v2\/tags?post=3756"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}