<\/span><\/h2>\nTi\u1ebfng \u1ed3n trong nh\u00e0 x\u01b0\u1edfng l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 g\u00e2y t\u00e1c \u0111\u1ed9ng l\u1edbn nh\u1ea5t \u0111\u1ebfn s\u1ee9c kh\u1ecfe v\u00e0 hi\u1ec7u su\u1ea5t l\u00e0m vi\u1ec7c c\u1ee7a ng\u01b0\u1eddi lao \u0111\u1ed9ng. Kh\u00f4ng ch\u1ec9 t\u1ea1o c\u1ea3m gi\u00e1c m\u1ec7t m\u1ecfi v\u00e0 c\u0103ng th\u1eb3ng, ti\u1ebfng \u1ed3n v\u01b0\u1ee3t ng\u01b0\u1ee1ng cho ph\u00e9p c\u00f2n c\u00f3 th\u1ec3 g\u00e2y t\u1ed5n th\u01b0\u01a1ng l\u00e2u d\u00e0i cho h\u1ec7 th\u1ea7n kinh v\u00e0 th\u00ednh gi\u00e1c. Theo c\u00e1c nghi\u00ean c\u1ee9u y h\u1ecdc lao \u0111\u1ed9ng, khi m\u1ee9c \u1ed3n v\u01b0\u1ee3t qu\u00e1 85 dBA trong 8 gi\u1edd li\u00ean t\u1ee5c, nguy c\u01a1 suy gi\u1ea3m th\u00ednh l\u1ef1c l\u00e0 r\u1ea5t cao; m\u1ee9c \u1ed3n t\u1eeb 90 dBA tr\u1edf l\u00ean c\u00f3 th\u1ec3 g\u00e2y m\u1ea5t th\u00ednh l\u1ef1c v\u0129nh vi\u1ec5n n\u1ebfu ti\u1ebfp x\u00fac th\u01b0\u1eddng xuy\u00ean.<\/p>\n
\u1ea2nh h\u01b0\u1edfng c\u1ee7a ti\u1ebfng \u1ed3n kh\u00f4ng ch\u1ec9 d\u1eebng l\u1ea1i \u1edf kh\u00eda c\u1ea1nh s\u1ee9c kh\u1ecfe. Trong m\u00f4i tr\u01b0\u1eddng s\u1ea3n xu\u1ea5t, ti\u1ebfng \u1ed3n cao l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng giao ti\u1ebfp gi\u1eefa c\u00f4ng nh\u00e2n, t\u0103ng nguy c\u01a1 tai n\u1ea1n lao \u0111\u1ed9ng do kh\u00f4ng nghe r\u00f5 t\u00edn hi\u1ec7u c\u1ea3nh b\u00e1o. Ti\u1ebfng \u1ed3n k\u00e9o d\u00e0i c\u0169ng l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng t\u1eadp trung, g\u00e2y sai s\u1ed1 trong thao t\u00e1c v\u00e0 l\u00e0m gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m. \u0110\u1ed1i v\u1edbi nh\u1eefng d\u00e2y chuy\u1ec1n y\u00eau c\u1ea7u \u0111\u1ed9 ch\u00ednh x\u00e1c cao nh\u01b0 c\u01a1 kh\u00ed, \u0111i\u1ec7n t\u1eed hay ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m, vi\u1ec7c ki\u1ec3m so\u00e1t ti\u1ebfng \u1ed3n l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ea3m b\u1ea3o hi\u1ec7u qu\u1ea3 v\u1eadn h\u00e0nh.<\/p>\n
Vi\u1ec7c \u0111\u1ea7u t\u01b0 h\u1ec7 th\u1ed1ng c\u00e1ch \u00e2m nh\u00e0 x\u01b0\u1edfng kh\u00f4ng ch\u1ec9 gi\u00fap ki\u1ec3m so\u00e1t ti\u1ebfng \u1ed3n m\u1ed9t c\u00e1ch khoa h\u1ecdc m\u00e0 c\u00f2n g\u00f3p ph\u1ea7n x\u00e2y d\u1ef1ng m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c an to\u00e0n, \u1ed5n \u0111\u1ecbnh v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh trong QCVN 26:2010\/BTNMT. Doanh nghi\u1ec7p \u00e1p d\u1ee5ng gi\u1ea3i ph\u00e1p c\u00e1ch \u00e2m ph\u00f9 h\u1ee3p s\u1ebd gi\u1ea3m thi\u1ec3u r\u1ee7i ro ngh\u1ec1 nghi\u1ec7p, b\u1ea3o v\u1ec7 s\u1ee9c kh\u1ecfe ng\u01b0\u1eddi lao \u0111\u1ed9ng v\u00e0 duy tr\u00ec hi\u1ec7u su\u1ea5t s\u1ea3n xu\u1ea5t b\u1ec1n v\u1eefng. B\u00ean c\u1ea1nh kh\u00eda c\u1ea1nh k\u1ef9 thu\u1eadt, \u0111\u00e2y c\u00f2n l\u00e0 minh ch\u1ee9ng cho cam k\u1ebft ph\u00e1t tri\u1ec3n b\u1ec1n v\u1eefng v\u00e0 tr\u00e1ch nhi\u1ec7m x\u00e3 h\u1ed9i c\u1ee7a doanh nghi\u1ec7p trong ho\u1ea1t \u0111\u1ed9ng c\u00f4ng nghi\u1ec7p hi\u1ec7n \u0111\u1ea1i.<\/p>\n![\"c\u00e1ch](\"https:\/\/datkhucongnghiep247.com.vn\/en\/wp-content\/uploads\/2025\/11\/Untitled-design-71.png\")
T\u1ea7m quan tr\u1ecdng c\u1ee7a c\u00e1ch \u00e2m cho nh\u00e0 x\u01b0\u1edfng<\/figcaption><\/figure>\n<\/span>Nguy\u00ean nh\u00e2n v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m ti\u1ebfng \u1ed3n trong nh\u00e0 x\u01b0\u1edfng<\/strong><\/span><\/h2>\nTi\u1ebfng \u1ed3n trong nh\u00e0 x\u01b0\u1edfng s\u1ea3n xu\u1ea5t th\u01b0\u1eddng b\u1eaft ngu\u1ed3n t\u1eeb nhi\u1ec1u lo\u1ea1i m\u00e1y m\u00f3c v\u00e0 thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c v\u1edbi c\u00f4ng su\u1ea5t l\u1edbn. C\u00e1c ngu\u1ed3n ph\u00e1t \u00e2m ph\u1ed5 bi\u1ebfn bao g\u1ed3m m\u00e1y d\u1eadp c\u01a1 kh\u00ed, m\u00e1y c\u1eaft, m\u00e1y n\u00e9n kh\u00ed, b\u0103ng t\u1ea3i, h\u1ec7 th\u1ed1ng qu\u1ea1t th\u00f4ng gi\u00f3 c\u00f4ng nghi\u1ec7p v\u00e0 c\u00e1c \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n. Ngo\u00e0i ra, qu\u00e1 tr\u00ecnh va ch\u1ea1m gi\u1eefa kim lo\u1ea1i, v\u1eadn h\u00e0nh thi\u1ebft b\u1ecb n\u1eb7ng hay l\u01b0u th\u00f4ng xe n\u00e2ng trong khu v\u1ef1c s\u1ea3n xu\u1ea5t c\u0169ng g\u00f3p ph\u1ea7n l\u00e0m t\u0103ng m\u1ee9c \u0111\u1ed9 \u1ed3n t\u1ed5ng th\u1ec3.<\/p>\n
\u0110\u1eb7c tr\u01b0ng c\u1ee7a ti\u1ebfng \u1ed3n c\u00f4ng nghi\u1ec7p l\u00e0 c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 cao, t\u1ea7n s\u1ed1 r\u1ed9ng v\u00e0 t\u00ednh l\u1eb7p l\u1ea1i li\u00ean t\u1ee5c. Trong c\u00e1c nh\u00e0 x\u01b0\u1edfng c\u00f3 k\u1ebft c\u1ea5u khung th\u00e9p, t\u01b0\u1eddng t\u00f4n v\u00e0 tr\u1ea7n kim lo\u1ea1i, s\u00f3ng \u00e2m d\u1ec5 d\u00e0ng ph\u1ea3n x\u1ea1 v\u00e0 khu\u1ebfch \u0111\u1ea1i, khi\u1ebfn \u00e2m l\u01b0\u1ee3ng th\u1ef1c t\u1ebf l\u1edbn h\u01a1n nhi\u1ec1u so v\u1edbi ngu\u1ed3n ph\u00e1t ban \u0111\u1ea7u. Hi\u1ec7n t\u01b0\u1ee3ng c\u1ed9ng h\u01b0\u1edfng \u00e2m thanh trong kh\u00f4ng gian k\u00edn l\u00e0m cho m\u1ee9c \u1ed3n kh\u00f4ng ch\u1ec9 gi\u1edbi h\u1ea1n \u1edf khu v\u1ef1c s\u1ea3n xu\u1ea5t m\u00e0 c\u00f2n lan truy\u1ec1n sang c\u00e1c khu v\u1ef1c ph\u1ee5 tr\u1ee3, v\u0103n ph\u00f2ng ho\u1eb7c nh\u00e0 \u0111i\u1ec1u h\u00e0nh.<\/p>\n
Nhi\u1ec1u y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng truy\u1ec1n \u00e2m trong nh\u00e0 x\u01b0\u1edfng nh\u01b0 chi\u1ec1u cao m\u00e1i, di\u1ec7n t\u00edch kh\u00f4ng gian, lo\u1ea1i v\u1eadt li\u1ec7u bao che v\u00e0 \u0111\u1ed9 nh\u1eb5n c\u1ee7a b\u1ec1 m\u1eb7t. Nh\u1eefng b\u1ec1 m\u1eb7t ph\u1eb3ng, c\u1ee9ng nh\u01b0 b\u00ea t\u00f4ng, th\u00e9p ho\u1eb7c t\u00f4n c\u00f3 xu h\u01b0\u1edbng ph\u1ea3n x\u1ea1 \u00e2m m\u1ea1nh h\u01a1n, l\u00e0m ti\u1ebfng \u1ed3n k\u00e9o d\u00e0i v\u00e0 vang d\u1ed9i. Khi kh\u00f4ng c\u00f3 bi\u1ec7n ph\u00e1p x\u1eed l\u00fd \u00e2m h\u1ecdc ph\u00f9 h\u1ee3p, s\u00f3ng \u00e2m s\u1ebd lan truy\u1ec1n qua c\u00e1c c\u1ea5u ki\u1ec7n, g\u00e2y rung k\u1ebft c\u1ea5u, t\u0103ng m\u1ee9c \u1ed3n n\u1ec1n v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u1ea3 khu v\u1ef1c xung quanh nh\u00e0 m\u00e1y.<\/p>\n
Vi\u1ec7c nh\u1eadn di\u1ec7n ch\u00ednh x\u00e1c nguy\u00ean nh\u00e2n v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a ti\u1ebfng \u1ed3n l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean \u0111\u1ec3 l\u1ef1a ch\u1ecdn gi\u1ea3i ph\u00e1p c\u00e1ch \u00e2m nh\u00e0 x\u01b0\u1edfng t\u1ed1i \u01b0u. M\u1ed9t ph\u01b0\u01a1ng \u00e1n thi\u1ebft k\u1ebf hi\u1ec7u qu\u1ea3 c\u1ea7n d\u1ef1a tr\u00ean \u0111\u1eb7c th\u00f9 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a t\u1eebng d\u00e2y chuy\u1ec1n, v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng v\u00e0 kh\u00f4ng gian s\u1eed d\u1ee5ng \u0111\u1ec3 v\u1eeba \u0111\u1ea3m b\u1ea3o hi\u1ec7u qu\u1ea3 c\u00e1ch \u00e2m v\u1eeba duy tr\u00ec \u0111i\u1ec1u ki\u1ec7n th\u00f4ng tho\u00e1ng cho s\u1ea3n xu\u1ea5t.<\/p>\n
<\/span>Ti\u00eau chu\u1ea9n v\u00e0 quy \u0111\u1ecbnh ti\u1ebfng \u1ed3n trong nh\u00e0 x\u01b0\u1edfng c\u00f4ng nghi\u1ec7p<\/strong><\/span><\/h2>\nTi\u1ebfng \u1ed3n trong nh\u00e0 x\u01b0\u1edfng c\u00f4ng nghi\u1ec7p \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd ch\u1eb7t ch\u1ebd th\u00f4ng qua c\u00e1c quy \u0111\u1ecbnh v\u00e0 ti\u00eau chu\u1ea9n qu\u1ed1c gia nh\u1eb1m \u0111\u1ea3m b\u1ea3o m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c an to\u00e0n, h\u1ea1n ch\u1ebf t\u00e1c \u0111\u1ed9ng ti\u00eau c\u1ef1c \u0111\u1ebfn s\u1ee9c kh\u1ecfe ng\u01b0\u1eddi lao \u0111\u1ed9ng v\u00e0 khu v\u1ef1c d\u00e2n c\u01b0 l\u00e2n c\u1eadn. Hai b\u1ed9 ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t hi\u1ec7n nay l\u00e0 QCVN 26:2010\/BTNMT v\u00e0 TCVN 3985:1999.<\/p>\n
Theo QCVN 26:2010\/BTNMT, m\u1ee9c \u1ed3n t\u1ed1i \u0111a cho ph\u00e9p t\u1ea1i ranh gi\u1edbi nh\u00e0 m\u00e1y kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 70 dBA v\u00e0o ban ng\u00e0y v\u00e0 55 dBA v\u00e0o ban \u0111\u00eam. \u0110\u00e2y l\u00e0 gi\u1edbi h\u1ea1n nh\u1eb1m ki\u1ec3m so\u00e1t \u1ea3nh h\u01b0\u1edfng c\u1ee7a ti\u1ebfng \u1ed3n c\u00f4ng nghi\u1ec7p \u0111\u1ebfn m\u00f4i tr\u01b0\u1eddng xung quanh, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c khu v\u1ef1c c\u00f3 d\u00e2n c\u01b0 sinh s\u1ed1ng g\u1ea7n khu s\u1ea3n xu\u1ea5t.<\/p>\n
Trong khi \u0111\u00f3, TCVN 3985:1999 quy \u0111\u1ecbnh m\u1ee9c ti\u1ebfng \u1ed3n an to\u00e0n t\u1ea1i n\u01a1i l\u00e0m vi\u1ec7c, t\u00f9y thu\u1ed9c v\u00e0o th\u1eddi gian ti\u1ebfp x\u00fac c\u1ee7a ng\u01b0\u1eddi lao \u0111\u1ed9ng. C\u1ee5 th\u1ec3:<\/p>\n
– 85 dBA cho 8 gi\u1edd l\u00e0m vi\u1ec7c li\u00ean t\u1ee5c.<\/p>\n
– 90 dBA cho 4 gi\u1edd.<\/p>\n
– 95 dBA cho 2 gi\u1edd.<\/p>\n
– 100 dBA n\u1ebfu ti\u1ebfp x\u00fac d\u01b0\u1edbi 1 gi\u1edd.<\/p>\n
C\u00e1c quy chu\u1ea9n n\u00e0y \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng d\u1ef1a tr\u00ean gi\u1edbi h\u1ea1n sinh l\u00fd c\u1ee7a con ng\u01b0\u1eddi, nh\u1eb1m gi\u1ea3m nguy c\u01a1 m\u1ea5t th\u00ednh l\u1ef1c, stress v\u00e0 c\u00e1c b\u1ec7nh ngh\u1ec1 nghi\u1ec7p do ti\u1ebfng \u1ed3n g\u00e2y ra. Ngo\u00e0i ra, c\u00e1c nh\u00e0 x\u01b0\u1edfng c\u00f3 m\u1ee9c \u1ed3n v\u01b0\u1ee3t ng\u01b0\u1ee1ng ph\u1ea3i th\u1ef1c hi\u1ec7n bi\u1ec7n ph\u00e1p ki\u1ec3m so\u00e1t k\u1ef9 thu\u1eadt nh\u01b0 l\u1eafp v\u00e1ch ti\u00eau \u00e2m, b\u1ed1 tr\u00ed l\u1ea1i m\u1eb7t b\u1eb1ng s\u1ea3n xu\u1ea5t, ho\u1eb7c b\u1ecdc c\u00e1ch \u00e2m cho thi\u1ebft b\u1ecb ph\u00e1t ti\u1ebfng \u1ed3n l\u1edbn.<\/p>\n
Doanh nghi\u1ec7p c\u00f3 tr\u00e1ch nhi\u1ec7m quan tr\u1eafc v\u00e0 b\u00e1o c\u00e1o ti\u1ebfng \u1ed3n \u0111\u1ecbnh k\u1ef3 cho c\u01a1 quan qu\u1ea3n l\u00fd m\u00f4i tr\u01b0\u1eddng. Vi\u1ec7c \u0111o \u0111\u1ea1c \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i nhi\u1ec1u v\u1ecb tr\u00ed kh\u00e1c nhau trong nh\u00e0 x\u01b0\u1edfng, bao g\u1ed3m khu v\u1ef1c s\u1ea3n xu\u1ea5t ch\u00ednh, khu v\u0103n ph\u00f2ng v\u00e0 ranh gi\u1edbi nh\u00e0 m\u00e1y. N\u1ebfu k\u1ebft qu\u1ea3 v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n cho ph\u00e9p, doanh nghi\u1ec7p ph\u1ea3i l\u1eadp k\u1ebf ho\u1ea1ch kh\u1eafc ph\u1ee5c v\u00e0 b\u00e1o c\u00e1o ti\u1ebfn \u0111\u1ed9 th\u1ef1c hi\u1ec7n.<\/p>\n
Tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n ti\u1ebfng \u1ed3n kh\u00f4ng ch\u1ec9 l\u00e0 ngh\u0129a v\u1ee5 ph\u00e1p l\u00fd m\u00e0 c\u00f2n l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ec3 doanh nghi\u1ec7p duy tr\u00ec ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh, \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u ki\u1ec3m \u0111\u1ecbnh m\u00f4i tr\u01b0\u1eddng lao \u0111\u1ed9ng, tr\u00e1nh c\u00e1c h\u00ecnh th\u1ee9c x\u1eed ph\u1ea1t h\u00e0nh ch\u00ednh, \u0111\u1ed3ng th\u1eddi t\u1ea1o m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c chuy\u00ean nghi\u1ec7p v\u00e0 an to\u00e0n cho ng\u01b0\u1eddi lao \u0111\u1ed9ng.<\/p>\n
<\/span>C\u00e1c gi\u1ea3i ph\u00e1p c\u00e1ch \u00e2m hi\u1ec7u qu\u1ea3 cho nh\u00e0 x\u01b0\u1edfng s\u1ea3n xu\u1ea5t<\/strong><\/span><\/h2>\n<\/span>Gi\u1ea3i ph\u00e1p thi\u1ebft k\u1ebf ki\u1ebfn tr\u00fac v\u00e0 b\u1ed1 tr\u00ed m\u1eb7t b\u1eb1ng<\/span><\/h3>\nTrong qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf nh\u00e0 x\u01b0\u1edfng, vi\u1ec7c t\u1ed5 ch\u1ee9c kh\u00f4ng gian h\u1ee3p l\u00fd c\u00f3 vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c ki\u1ec3m so\u00e1t v\u00e0 h\u1ea1n ch\u1ebf lan truy\u1ec1n ti\u1ebfng \u1ed3n. C\u00e1c khu v\u1ef1c c\u00f3 ngu\u1ed3n \u00e2m l\u1edbn nh\u01b0 m\u00e1y d\u1eadp, m\u00e1y nghi\u1ec1n, m\u00e1y n\u00e9n kh\u00ed ho\u1eb7c h\u1ec7 th\u1ed1ng qu\u1ea1t c\u00f4ng nghi\u1ec7p n\u00ean \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed t\u00e1ch bi\u1ec7t ho\u00e0n to\u00e0n kh\u1ecfi khu v\u0103n ph\u00f2ng, ph\u00f2ng \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c khu v\u1ef1c ngh\u1ec9 ng\u01a1i. Vi\u1ec7c s\u1eafp x\u1ebfp d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t c\u1ea7n tu\u00e2n theo nguy\u00ean t\u1eafc ph\u00e2n v\u00f9ng ch\u1ee9c n\u0103ng, t\u1ea1o kho\u1ea3ng \u0111\u1ec7m b\u1eb1ng t\u01b0\u1eddng ng\u0103n ho\u1eb7c h\u00e0nh lang k\u1ef9 thu\u1eadt \u0111\u1ec3 gi\u1ea3m truy\u1ec1n \u00e2m tr\u1ef1c ti\u1ebfp gi\u1eefa c\u00e1c khu v\u1ef1c.<\/p>\n
Trong\u00a0thi\u1ebft k\u1ebf x\u00e2y d\u1ef1ng\u00a0nh\u00e0 x\u01b0\u1edfng, tr\u1ea7n nh\u00e0 n\u00ean \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi chi\u1ec1u cao ph\u00f9 h\u1ee3p nh\u1eb1m h\u1ea1n ch\u1ebf hi\u1ec7n t\u01b0\u1ee3ng c\u1ed9ng h\u01b0\u1edfng \u00e2m thanh trong kh\u00f4ng gian k\u00edn. Vi\u1ec7c k\u1ebft h\u1ee3p s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u ti\u00eau \u00e2m nh\u01b0 t\u1ea5m s\u1ee3i kho\u00e1ng, b\u00f4ng th\u1ee7y tinh ho\u1eb7c panel ti\u00eau \u00e2m t\u1ea1i m\u00e1i v\u00e0 t\u01b0\u1eddng gi\u00fap c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 \u00e2m thanh v\u00e0 gi\u1ea3m ph\u1ea3n x\u1ea1 \u00e2m trong khu v\u1ef1c s\u1ea3n xu\u1ea5t.<\/p>\n