Th\u1eddi Trung Qu\u1ed1c c\u1ed5 \u0111\u1ea1i ng\u01b0\u1eddi ta \u0111\u00e3 d\u00f9ng ti\u1ebfng chu\u00f4ng \u0111\u1ec3 x\u1eed t\u1eed ph\u1ea1m nh\u00e2n. H\u1ecd tr\u00f3i ph\u1ea1m nh\u00e2n v\u00e0o m\u1ed9t c\u00e1i chu\u00f4ng to, d\u00f9ng ti\u1ebfng chu\u00f4ng k\u00edch th\u00edch khi\u1ebfn cho ph\u1ea1m nh\u00e2n v\u1eadt v\u00e3 \u0111\u1ebfn ch\u1ebft. Trong Chi\u1ebfn tranh th\u1ebf gi\u1edbi th\u1ee9 hai, ph\u00e1t x\u00edt \u0110\u1ee9c \u0111\u00e3 t\u1eebng s\u1eed d\u1ee5ng h\u00ecnh ph\u1ea1t b\u1eb1ng ti\u1ebfng \u1ed3n r\u1ea5t t\u00e0n nh\u1eabn: ba m\u1eb7t c\u1ee7a ph\u00f2ng th\u1ea9m v\u1ea5n \u0111\u1ec1u \u0111\u01b0\u1ee3c x\u00e2y b\u1ecbt k\u00edn b\u1eb1ng t\u01b0\u1eddng xi m\u0103ng, trong \u0111\u00f3 \u0111\u1eb7t m\u1ed9t c\u00e1i loa v\u00e0 m\u1ed9t c\u00e1i c\u00f2i ph\u00e1t ra ti\u1ebfng \u1ed3n r\u1ea5t \u0111\u00e1ng s\u1ee3. Ph\u1ea1m nh\u00e2n d\u01b0\u1edbi s\u1ef1 k\u00edch th\u00edch c\u1ee7a ti\u1ebfng \u1ed3n ng\u01b0\u1eddi n\u1ea3y l\u00ean nh\u01b0 b\u1ecb \u0111i\u1ec7n gi\u1eadt. Ban \u0111\u1ea7u l\u00e0 \u0111\u1ee9ng kh\u00f4ng v\u1eefng, sau \u0111\u00f3 m\u1ed3 h\u00f4i \u0111\u1ea7m \u0111\u00eca, to\u00e0n th\u00e2n co r\u00fam, ti\u1ebfp theo l\u00e0 g\u00e0o th\u00e9t, m\u1eaft \u0111\u1ecf m\u1ecdng v\u00e0 cu\u1ed1i c\u00f9ng gi\u00e3y gi\u1ee5a, \u0111\u1eadp \u0111\u1ea7u v\u00e0o t\u01b0\u1eddng \u0111\u1ec3 ch\u1ebft. D\u01b0\u1edbi ti\u1ebfng \u1ed3n r\u1ea5t m\u1ea1nh, nhi\u1ec1u ng\u01b0\u1eddi v\u00ec b\u1ecb ph\u00e1 v\u1ee1 m\u00e0ng tai m\u00e0 ch\u1ebft.<\/p>\n\n\n\n
Ti\u1ebfng \u1ed3n c\u00f3 th\u1ec3 ph\u00e2n l\u00e0m hai lo\u1ea1i: m\u1ed9t lo\u1ea1i l\u00e0 ti\u1ebfng \u1ed3n b\u00ecnh th\u01b0\u1eddng, c\u00f3 th\u1ec3 nghe th\u1ea5y v\u00e0 kh\u00f4ng b\u1ecb b\u1ea5t ng\u1edd, nh\u01b0 ti\u1ebfng \u1ed3n c\u1ee7a xe c\u1ed9 \u0111i l\u1ea1i tr\u00ean \u0111\u01b0\u1eddng, ti\u1ebfng t\u00e0u h\u1ecfa \u0111\u1ecbnh k\u00ec h\u00e0ng ng\u00e0y v\u00e0 nh\u1eefng ti\u1ebfng \u1ed3n \u00e0o kh\u00e1c trong cu\u1ed9c s\u1ed1ng \u0111\u00f4 th\u1ecb, ti\u1ebfng \u1ed3n c\u1ee7a m\u00e1y m\u00f3c \u0111\u1ec1u l\u00e0 nh\u1eefng ti\u1ebfng \u1ed3n c\u00f3 qui lu\u1eadt. M\u1ed9t lo\u1ea1t ti\u1ebfng \u1ed3n kh\u00e1c l\u00e0 ti\u1ebfng \u1ed3n kh\u00f4ng c\u00f3 qui lu\u1eadt v\u00e0 kh\u00f4ng th\u1ec3 bi\u1ebft tr\u01b0\u1edbc \u0111\u01b0\u1ee3c, nh\u01b0 ti\u1ebfng bom n\u1ed5, ti\u1ebfng r\u00edt x\u00e9 tai, v.v.. lo\u1ea1i ti\u1ebfng \u1ed3n kh\u00f4ng c\u00f3 qui lu\u1eadt n\u00e0y r\u1ea5t t\u1ed5n th\u01b0\u01a1ng \u0111\u1ebfn t\u00e2m l\u00ed, sinh l\u00ed c\u1ee7a con ng\u01b0\u1eddi. N\u1ebfu ti\u1ebfng \u1ed3n c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 m\u1ea1nh x\u1ea3y ra \u0111\u1ed9t ng\u1ed9t d\u1ec5 g\u00e2y ra ph\u1ea3n \u1ee9ng c\u00f3 t\u00ednh sinh l\u00ed \u0111\u1ed1i v\u1edbi c\u01a1 th\u1ec3 ng\u01b0\u1eddi, ng\u01b0\u1eddi ta g\u1ecdi \u0111\u00f3 l\u00e0 ph\u1ea3n x\u1ea1 gi\u1eadt m\u00ecnh khi\u1ebfn cho c\u01a1 th\u1ec3 ph\u00e1t sinh c\u00e1c ch\u1ee9ng nh\u01b0 c\u01a1 b\u1ee5ng c\u0103ng th\u1eb3ng, ch\u1edbp m\u1eaft, ra m\u1ed3 h\u00f4i l\u1ea1nh, huy\u1ebft \u00e1p t\u0103ng cao, v.v.. N\u00f3 t\u00e1c h\u1ea1i \u0111\u1ebfn ch\u1ee9c n\u0103ng b\u00ecnh th\u01b0\u1eddng c\u1ee7a c\u01a1 th\u1ec3. \u0110\u01a1n v\u1ecb ti\u1ebfng \u1ed3n l\u00e0 dB (\u0111\u00eaxiben). Th\u00f4ng th\u01b0\u1eddng ban ng\u00e0y ti\u1ebfng \u1ed3n v\u01b0\u1ee3t qu\u00e1 55 dB \u0111\u00e3 \u0111\u01b0\u1ee3c xem l\u00e0 \u00f4 nhi\u1ec5m ti\u1ebfng \u1ed3n nghi\u00eam tr\u1ecdng. Theo th\u1ed1ng k\u00ea, v\u1edbi \u00e2m thanh cao 95 dB, 39% s\u1ed1 ng\u01b0\u1eddi b\u1ecb v\u00e1ng \u0111\u1ea7u; 27% b\u1ecb \u0111au \u0111\u1ea7u, 18% b\u1ecb ch\u00e1n \u0103n, 27% tr\u00ed nh\u1edb gi\u1ea3m s\u00fat, 27% ng\u01b0\u1eddi b\u1ecb \u0111au d\u1ea1 d\u00e0y, 32% b\u1ecb m\u1ea5t ng\u1ee7, 22% b\u1ecb n\u00f4n nao.<\/p>\n\n\n\n
Khi th\u00e0nh ph\u1ed1 Th\u01b0\u1ee3ng H\u1ea3i x\u00e2y d\u1ef1ng c\u1ea7u Nam Ph\u1ed1, ti\u1ebfng \u1ed3n \u0111\u00f3ng c\u1ecdc \u0111\u1ea1t \u0111\u1ebfn 105 dB li\u00ean t\u1ee5c ng\u00e0y \u0111\u00eam l\u00e0m cho l\u1ee3n c\u1ee7a d\u00e2n c\u01b0 v\u00f9ng xung quanh \u0111\u1ec1u ch\u1ebft. Nh\u1eefng n\u0103m 50 c\u1ee7a th\u1ebf k\u1ec9 XX, c\u00f3 lo\u1ea1i m\u00e1y bay t\u1ed1c \u0111\u1ed9 1.100 km\/h, bay \u1edf t\u1ea7m cao 60 m, ti\u1ebfng r\u00edt c\u1ee7a n\u00f3 c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 v\u01b0\u1ee3t qu\u00e1 150 dB g\u00e2y rung \u0111\u1ed9ng l\u00e0m \u0111\u1ed5 s\u1eadp m\u1ed9t ng\u00f4i nh\u00e0. C\u00f3 th\u1ec3 th\u1ea5y ti\u1ebfng \u1ed3n l\u1edbn qu\u1ea3 th\u1ef1c g\u00e2y nguy hi\u1ec3m ch\u1ebft ng\u01b0\u1eddi. V\u00ec v\u1eady d\u00f9ng n\u00f3 l\u00e0m h\u00ecnh ph\u1ea1t c\u0169ng kh\u00f4ng c\u00f3 g\u00ec l\u00e0 l\u1ea1.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Ti\u1ebfng \u1ed3n; \u0110\u00eaxiben.<\/p>\n","protected":false},"excerpt":{"rendered":"
Th\u1eddi Trung Qu\u1ed1c c\u1ed5 \u0111\u1ea1i ng\u01b0\u1eddi ta \u0111\u00e3 d\u00f9ng ti\u1ebfng chu\u00f4ng \u0111\u1ec3 x\u1eed t\u1eed ph\u1ea1m nh\u00e2n. H\u1ecd tr\u00f3i ph\u1ea1m nh\u00e2n v\u00e0o m\u1ed9t c\u00e1i chu\u00f4ng to, d\u00f9ng ti\u1ebfng chu\u00f4ng k\u00edch th\u00edch khi\u1ebfn cho ph\u1ea1m nh\u00e2n v\u1eadt v\u00e3 \u0111\u1ebfn ch\u1ebft. Trong Chi\u1ebfn tranh th\u1ebf gi\u1edbi th\u1ee9 hai, ph\u00e1t x\u00edt \u0110\u1ee9c \u0111\u00e3 t\u1eebng s\u1eed d\u1ee5ng h\u00ecnh ph\u1ea1t b\u1eb1ng […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,17],"tags":[],"class_list":["post-9458","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-moi-truong"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9458","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=9458"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9458\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=9458"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=9458"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=9458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}