{"id":28607,"date":"2019-02-03T19:19:00","date_gmt":"2019-02-03T12:19:00","guid":{"rendered":"https:\/\/ttud.com.vn\/?p=28607"},"modified":"2021-10-03T19:20:38","modified_gmt":"2021-10-03T12:20:38","slug":"cong-nghe-moi-su-dung-tia-laser-de-truyen-thong-diep-am-thanh-den-tung-nguoi","status":"publish","type":"post","link":"https:\/\/casta.ttud.com.vn\/index.php\/cong-nghe-moi-su-dung-tia-laser-de-truyen-thong-diep-am-thanh-den-tung-nguoi\/","title":{"rendered":"C\u00f4ng ngh\u1ec7 m\u1edbi s\u1eed d\u1ee5ng tia laser \u0111\u1ec3 truy\u1ec1n th\u00f4ng \u0111i\u1ec7p \u00e2m thanh \u0111\u1ebfn t\u1eebng ng\u01b0\u1eddi"},"content":{"rendered":"\n

C\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u t\u1ea1i Vi\u1ec7n C\u00f4ng ngh\u1ec7 Massachusetts \u0111\u00e3 ch\u1ee9ng minh tia laser c\u00f3 th\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u1ebfn b\u1ea5t c\u1ee9 thi\u1ebft b\u1ecb thu n\u00e0o. Kh\u1ea3 n\u0103ng g\u1eedi t\u00edn hi\u1ec7u \u00e2m thanh c\u00f3 m\u1ee5c ti\u00eau qua kh\u00f4ng kh\u00ed c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 li\u00ean l\u1ea1c gi\u1eefa c\u00e1c c\u0103n ph\u00f2ng \u1ed3n \u00e0o ho\u1eb7c c\u1ea3nh b\u00e1o cho m\u1ecdi ng\u01b0\u1eddi v\u1ec1 t\u00ecnh hu\u1ed1ng nguy hi\u1ec3m. C\u1ee5 th\u1ec3, nh\u00f3m nghi\u00ean c\u1ee9u \u0111\u00e3 s\u1eed d\u1ee5ng hai ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau d\u1ef1a v\u00e0o laser \u0111\u1ec3 truy\u1ec1n nhi\u1ec1u \u00e2m thanh, lo\u1ea1i nh\u1ea1c v\u00e0 l\u1eddi n\u00f3i \u0111\u01b0\u1ee3c ghi \u00e2m v\u1edbi \u00e2m l\u01b0\u1ee3ng c\u1ee7a cu\u1ed9c h\u1ed9i tho\u1ea1i.<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

“H\u1ec7 th\u1ed1ng c\u1ee7a ch\u00fang t\u00f4i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng t\u1eeb xa \u0111\u1ec3 truy\u1ec1n th\u00f4ng tin tr\u1ef1c ti\u1ebfp \u0111\u1ebfn tai c\u1ee7a m\u1ed9t ng\u01b0\u1eddi n\u00e0o \u0111\u00f3<\/em>“, Charles M. Wynn, tr\u01b0\u1edfng nh\u00f3m nghi\u00ean c\u1ee9u n\u00f3i. “\u0110\u00e2y l\u00e0 h\u1ec7 th\u1ed1ng \u0111\u1ea7u ti\u00ean s\u1eed d\u1ee5ng tia laser nh\u01b0ng ho\u00e0n to\u00e0n an to\u00e0n cho m\u1eaft v\u00e0 da \u0111\u1ec3 \u0111\u1ecbnh v\u1ecb t\u00edn hi\u1ec7u \u00e2m thanh \u0111\u1ebfn m\u1ed9t ng\u01b0\u1eddi c\u1ee5 th\u1ec3 trong b\u1ea5t c\u1ee9 m\u00f4i tr\u01b0\u1eddng n\u00e0o<\/em>“.<\/p>\n\n\n\n

T\u1ea1o ra \u00e2m thanh t\u1eeb kh\u00f4ng kh\u00ed<\/em><\/p>\n\n\n\n

C\u00e1c ph\u01b0\u01a1ng ph\u00e1p m\u1edbi d\u1ef1a v\u00e0o hi\u1ec7u \u1ee9ng quang \u00e2m xu\u1ea5t hi\u1ec7n khi m\u1ed9t v\u1eadt li\u1ec7u t\u1ea1o s\u00f3ng \u00e2m sau khi h\u1ea5p th\u1ee5 \u00e1nh s\u00e1ng. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u00e3 s\u1eed d\u1ee5ng h\u01a1i n\u01b0\u1edbc trong kh\u00f4ng kh\u00ed \u0111\u1ec3 h\u1ea5p th\u1ee5 \u00e1nh s\u00e1ng v\u00e0 t\u1ea1o ra \u00e2m thanh.<\/p>\n\n\n\n

“\u0110i\u1ec1u \u0111\u00f3 c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng ngay c\u1ea3 trong \u0111i\u1ec1u ki\u1ec7n t\u01b0\u01a1ng \u0111\u1ed1i kh\u00f4 v\u00ec h\u1ea7u nh\u01b0 lu\u00f4n c\u00f3 m\u1ed9t \u00edt n\u01b0\u1edbc trong kh\u00f4ng kh\u00ed, \u0111\u1eb7c bi\u1ec7t l\u00e0 xung quanh con ng\u01b0\u1eddi<\/em>“, Wynn n\u00f3i. “Ch\u00fang t\u00f4i nh\u1eadn th\u1ea5y kh\u00f4ng c\u1ea7n nhi\u1ec1u n\u01b0\u1edbc n\u1ebfu ch\u00fang t\u00f4i s\u1eed d\u1ee5ng b\u01b0\u1edbc s\u00f3ng laser \u0111\u01b0\u1ee3c h\u1ea5p th\u1ee5 r\u1ea5t m\u1ea1nh b\u1edfi n\u01b0\u1edbc. \u0110\u00e2y l\u00e0 \u0111i\u1ec3m m\u1ea5u ch\u1ed1t v\u00ec kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 m\u1ea1nh t\u1ea1o ra nhi\u1ec1u \u00e2m thanh h\u01a1n<\/em>“.<\/p>\n\n\n\n

M\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p m\u1edbi truy\u1ec1n \u00e2m thanh \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n tr\u00ean c\u01a1 s\u1edf c\u1ee7a k\u1ef9 thu\u1eadt quang ph\u1ed5 quang \u00e2m \u0111\u1ed9ng (DPAS) tr\u01b0\u1edbc \u0111\u00e2y l\u00e0m nh\u1eb1m ph\u00e1t hi\u1ec7n h\u00f3a ch\u1ea5t. Trong nghi\u00ean c\u1ee9u tr\u01b0\u1edbc \u0111\u00e2y, c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 ph\u00e1t hi\u1ec7n ra r\u1eb1ng qu\u00e9t m\u1ed9t ch\u00f9m tia laser b\u1eb1ng t\u1ed1c \u0111\u1ed9 \u00e2m thanh c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n h\u00f3a ch\u1ea5t.<\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi ph\u01b0\u01a1ng ph\u00e1p li\u00ean quan \u0111\u1ebfn DPAS, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u thay \u0111\u1ed5i th\u1eddi gian c\u1ee7a c\u00e1c l\u1ea7n qu\u00e9t laser \u0111\u1ec3 m\u00e3 h\u00f3a nhi\u1ec1u t\u1ea7n s\u1ed1 kh\u00e1c nhau ho\u1eb7c c\u00e1c \u00e2m thanh nghe \u0111\u01b0\u1ee3c trong \u00e1nh s\u00e1ng. M\u1ed9t kh\u00eda c\u1ea1nh \u0111\u1ed9c \u0111\u00e1o c\u1ee7a k\u1ef9 thu\u1eadt qu\u00e9t laser n\u00e0y l\u00e0 t\u00edn hi\u1ec7u ch\u1ec9 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c nghe th\u1ea5y t\u1ea1i m\u1ed9t kho\u1ea3ng c\u00e1ch nh\u1ea5t \u0111\u1ecbnh t\u1eeb m\u00e1y ph\u00e1t. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t tin nh\u1eafn c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn m\u1ed9t ng\u01b0\u1eddi, thay v\u00ec t\u1ea5t c\u1ea3 nh\u1eefng ng\u01b0\u1eddi \u0111\u01b0\u1ee3c ch\u00f9m \u00e1nh s\u00e1ng qu\u00e9t qua. T\u1eeb \u0111\u00f3 c\u0169ng m\u1edf ra kh\u1ea3 n\u0103ng truy\u1ec1n 1 tin nh\u1eafn cho nhi\u1ec1u ng\u01b0\u1eddi.<\/p>\n\n\n\n

Th\u00ed nghi\u1ec7m t\u1ea1i lab<\/em><\/p>\n\n\n\n

Trong ph\u00f2ng th\u00ed nghi\u1ec7m, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u00e3 ch\u1ec9 ra r\u1eb1ng thi\u1ebft b\u1ecb th\u01b0\u01a1ng m\u1ea1i c\u00f3 th\u1ec3 truy\u1ec1n \u00e2m thanh \u0111\u1ebfn m\u1ed9t ng\u01b0\u1eddi \u1edf c\u00e1ch xa h\u01a1n 2,5m trong ph\u1ea1m vi 60 decibel b\u1eb1ng k\u1ef9 thu\u1eadt qu\u00e9t laser. Nh\u00f3m nghi\u00ean c\u1ee9u tin r\u1eb1ng h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng quy m\u00f4 \u0111\u1ebfn kho\u1ea3ng c\u00e1ch xa h\u01a1n. C\u00e1c nh\u00e0 khoa h\u1ecdc c\u0169ng \u0111\u00e3 th\u1eed nghi\u1ec7m m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p quang \u00e2m truy\u1ec1n th\u1ed1ng kh\u00f4ng c\u1ea7n qu\u00e9t laser v\u00e0 m\u00e3 h\u00f3a th\u00f4ng \u0111i\u1ec7p \u00e2m thanh b\u1eb1ng c\u00e1ch \u0111i\u1ec1u ch\u1ec9nh c\u00f4ng su\u1ea5t c\u1ee7a ch\u00f9m tia laser.<\/p>\n\n\n\n

C\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u d\u1ef1 ki\u1ebfn s\u1ebd tr\u00ecnh di\u1ec5n c\u00e1c ph\u01b0\u01a1ng ph\u00e1p m\u1edbi \u1edf ngo\u00e0i tr\u1eddi trong ph\u1ea1m vi  d\u00e0i h\u01a1n. “Ch\u00fang t\u00f4i hy v\u1ecdng cu\u1ed1i c\u00f9ng s\u1ebd l\u00e0 s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a m\u1ed9t c\u00f4ng ngh\u1ec7 th\u01b0\u01a1ng m\u1ea1i<\/em>“, Sullenberger n\u00f3i. “C\u00f3 r\u1ea5t nhi\u1ec1u kh\u1ea3 n\u0103ng th\u00fa v\u1ecb v\u00e0 ch\u00fang t\u00f4i mu\u1ed1n ph\u00e1t tri\u1ec3n c\u00f4ng ngh\u1ec7 truy\u1ec1n th\u00f4ng theo c\u00e1ch h\u1eefu \u00edch<\/em>“.<\/p>\n\n\n\n

N.P.D (NASATI)<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u t\u1ea1i Vi\u1ec7n C\u00f4ng ngh\u1ec7 Massachusetts \u0111\u00e3 ch\u1ee9ng minh tia laser c\u00f3 th\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u1ebfn b\u1ea5t c\u1ee9 thi\u1ebft b\u1ecb thu n\u00e0o. Kh\u1ea3 n\u0103ng g\u1eedi t\u00edn hi\u1ec7u \u00e2m thanh c\u00f3 m\u1ee5c ti\u00eau qua kh\u00f4ng kh\u00ed c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 li\u00ean l\u1ea1c gi\u1eefa c\u00e1c c\u0103n ph\u00f2ng […]<\/p>\n","protected":false},"author":17,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-28607","post","type-post","status-publish","format-standard","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28607","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/comments?post=28607"}],"version-history":[{"count":1,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28607\/revisions"}],"predecessor-version":[{"id":28608,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28607\/revisions\/28608"}],"wp:attachment":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media?parent=28607"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/categories?post=28607"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/tags?post=28607"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}