{"id":49372,"date":"2023-04-21T22:21:09","date_gmt":"2023-04-22T03:21:09","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-generate-ultrasonic-sound\/"},"modified":"2025-01-21T07:16:09","modified_gmt":"2025-01-21T12:16:09","slug":"how-to-generate-ultrasonic-sound","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-to-generate-ultrasonic-sound\/","title":{"rendered":"T\u1ea1o s\u00f3ng si\u00eau \u00e2m: Ph\u01b0\u01a1ng ph\u00e1p v\u00e0 \u1ee9ng d\u1ee5ng"},"content":{"rendered":"

\u00c2m thanh si\u00eau \u00e2m, v\u1edbi t\u1ea7n s\u1ed1 v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi (tr\u00ean 20kHz), c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng quan tr\u1ecdng trong y t\u1ebf, c\u00f4ng nghi\u1ec7p v\u00e0 \u0111\u1eddi s\u1ed1ng. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ea1o ra \u00e2m thanh si\u00eau \u00e2m, t\u1eeb nguy\u00ean l\u00fd c\u01a1 b\u1ea3n \u0111\u1ebfn c\u00e1c k\u1ef9 thu\u1eadt hi\u1ec7n \u0111\u1ea1i.<\/p>\n

Nguy\u00ean l\u00fd t\u1ea1o ra \u00e2m thanh si\u00eau \u00e2m<\/h3>\n

\u00c2m thanh si\u00eau \u00e2m \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1eb1ng c\u00e1ch l\u00e0m cho m\u1ed9t v\u1eadt th\u1ec3 dao \u0111\u1ed9ng v\u1edbi t\u1ea7n s\u1ed1 r\u1ea5t cao. S\u1ef1 dao \u0111\u1ed9ng n\u00e0y t\u1ea1o ra s\u00f3ng \u00e1p su\u1ea5t lan truy\u1ec1n trong m\u00f4i tr\u01b0\u1eddng, ch\u00ednh l\u00e0 s\u00f3ng si\u00eau \u00e2m. T\u1ea7n s\u1ed1 dao \u0111\u1ed9ng c\u00e0ng cao th\u00ec t\u1ea7n s\u1ed1 c\u1ee7a s\u00f3ng si\u00eau \u00e2m c\u00e0ng l\u1edbn.<\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p \u00e1p \u0111i\u1ec7n<\/h3>\n

Ph\u01b0\u01a1ng ph\u00e1p \u00e1p \u0111i\u1ec7n s\u1eed d\u1ee5ng c\u00e1c v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, ch\u1eb3ng h\u1ea1n nh\u01b0 th\u1ea1ch anh ho\u1eb7c g\u1ed1m \u00e1p \u0111i\u1ec7n, \u0111\u1ec3 t\u1ea1o ra \u00e2m thanh si\u00eau \u00e2m. Khi \u00e1p m\u1ed9t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u v\u00e0o v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, n\u00f3 s\u1ebd bi\u1ebfn \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00e0nh n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc d\u01b0\u1edbi d\u1ea1ng dao \u0111\u1ed9ng, t\u1eeb \u0111\u00f3 t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m. T\u1ea7n s\u1ed1 c\u1ee7a s\u00f3ng si\u00eau \u00e2m \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1edfi t\u1ea7n s\u1ed1 c\u1ee7a \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u.<\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p t\u1eeb gi\u1ea3o<\/h3>\n

Ph\u01b0\u01a1ng ph\u00e1p t\u1eeb gi\u1ea3o d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng t\u1eeb gi\u1ea3o, t\u1ee9c l\u00e0 s\u1ef1 thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc c\u1ee7a v\u1eadt li\u1ec7u t\u1eeb t\u00ednh khi \u0111\u1eb7t trong t\u1eeb tr\u01b0\u1eddng bi\u1ebfn thi\u00ean. B\u1eb1ng c\u00e1ch \u0111\u1eb7t m\u1ed9t v\u1eadt li\u1ec7u t\u1eeb gi\u1ea3o trong m\u1ed9t t\u1eeb tr\u01b0\u1eddng xoay chi\u1ec1u, ta c\u00f3 th\u1ec3 l\u00e0m cho n\u00f3 dao \u0111\u1ed9ng v\u00e0 t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m.<\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec7n t\u1eeb<\/h3>\n

Ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec7n t\u1eeb s\u1eed d\u1ee5ng cu\u1ed9n d\u00e2y v\u00e0 nam ch\u00e2m \u0111\u1ec3 t\u1ea1o ra dao \u0111\u1ed9ng. M\u1ed9t d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u ch\u1ea1y qua cu\u1ed9n d\u00e2y s\u1ebd t\u1ea1o ra t\u1eeb tr\u01b0\u1eddng bi\u1ebfn thi\u00ean, t\u00e1c \u0111\u1ed9ng l\u00ean nam ch\u00e2m v\u00e0 l\u00e0m nam ch\u00e2m dao \u0111\u1ed9ng, t\u1eeb \u0111\u00f3 ph\u00e1t ra s\u00f3ng si\u00eau \u00e2m.<\/p>\n

So s\u00e1nh c\u00e1c ph\u01b0\u01a1ng ph\u00e1p<\/h3>\n\n\n\n\n\n\n\n
Ph\u01b0\u01a1ng ph\u00e1p<\/th>\n\u01afu \u0111i\u1ec3m<\/th>\nNh\u01b0\u1ee3c \u0111i\u1ec3m<\/th>\n\u1ee8ng d\u1ee5ng<\/th>\n<\/tr>\n<\/thead>\n
\u00c1p \u0111i\u1ec7n<\/td>\nHi\u1ec7u su\u1ea5t cao, k\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn, d\u1ec5 \u0111i\u1ec1u khi\u1ec3n t\u1ea7n s\u1ed1<\/td>\n\u0110\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc h\u1ea1n ch\u1ebf \u1edf t\u1ea7n s\u1ed1 cao<\/td>\nY t\u1ebf, ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y<\/td>\n<\/tr>\n
T\u1eeb gi\u1ea3o<\/td>\nC\u00f4ng su\u1ea5t l\u1edbn, \u0111\u1ed9 b\u1ec1n cao<\/td>\nT\u1ea7n s\u1ed1 ho\u1ea1t \u0111\u1ed9ng th\u01b0\u1eddng th\u1ea5p h\u01a1n \u00e1p \u0111i\u1ec7n<\/td>\nL\u00e0m s\u1ea1ch si\u00eau \u00e2m c\u00f4ng nghi\u1ec7p<\/td>\n<\/tr>\n
\u0110i\u1ec7n t\u1eeb<\/td>\nC\u1ea5u t\u1ea1o \u0111\u01a1n gi\u1ea3n, gi\u00e1 th\u00e0nh th\u1ea5p<\/td>\nHi\u1ec7u su\u1ea5t th\u1ea5p h\u01a1n so v\u1edbi \u00e1p \u0111i\u1ec7n v\u00e0 t\u1eeb gi\u1ea3o<\/td>\nM\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 trong c\u00f4ng nghi\u1ec7p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t t\u1ea1o s\u00f3ng si\u00eau \u00e2m<\/h3>\n

Hi\u1ec7u su\u1ea5t t\u1ea1o s\u00f3ng si\u00eau \u00e2m ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1, bao g\u1ed3m:<\/p>\n

    \n
  • \u0110\u1eb7c t\u00ednh c\u1ee7a v\u1eadt li\u1ec7u:<\/strong> V\u00ed d\u1ee5, v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n c\u00f3 h\u1ec7 s\u1ed1 \u00e1p \u0111i\u1ec7n cao s\u1ebd t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m m\u1ea1nh h\u01a1n.<\/li>\n
  • T\u1ea7n s\u1ed1:<\/strong> T\u1ea7n s\u1ed1 c\u00e0ng cao th\u00ec vi\u1ec7c t\u1ea1o s\u00f3ng si\u00eau \u00e2m c\u00e0ng kh\u00f3 kh\u0103n.<\/li>\n
  • Thi\u1ebft k\u1ebf v\u00e0 c\u1ea5u tr\u00fac c\u1ee7a b\u1ed9 t\u1ea1o s\u00f3ng:<\/strong> M\u1ed9t thi\u1ebft k\u1ebf t\u1ed1i \u01b0u s\u1ebd gi\u00fap t\u0103ng hi\u1ec7u su\u1ea5t chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng.<\/li>\n
  • M\u00f4i tr\u01b0\u1eddng truy\u1ec1n s\u00f3ng:<\/strong> \u00c2m thanh si\u00eau \u00e2m lan truy\u1ec1n kh\u00e1c nhau trong c\u00e1c m\u00f4i tr\u01b0\u1eddng kh\u00e1c nhau.<\/li>\n<\/ul>\n

    T\u00f3m l\u1ea1i, vi\u1ec7c t\u1ea1o ra \u00e2m thanh si\u00eau \u00e2m c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau, m\u1ed7i ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec1u c\u00f3 \u01b0u \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m ri\u00eang. Vi\u1ec7c l\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 v\u00e0 c\u00e1c y\u00eau c\u1ea7u v\u1ec1 t\u1ea7n s\u1ed1, c\u00f4ng su\u1ea5t v\u00e0 hi\u1ec7u su\u1ea5t. S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng ngh\u1ec7 v\u1eadt li\u1ec7u v\u00e0 k\u1ef9 thu\u1eadt \u0111i\u1ec7n t\u1eed \u0111ang m\u1edf ra nh\u1eefng tri\u1ec3n v\u1ecdng m\u1edbi cho vi\u1ec7c t\u1ea1o ra v\u00e0 \u1ee9ng d\u1ee5ng \u00e2m thanh si\u00eau \u00e2m trong t\u01b0\u01a1ng lai.<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u00c2m thanh si\u00eau \u00e2m, v\u1edbi t\u1ea7n s\u1ed1 v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi (tr\u00ean 20kHz), c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng quan tr\u1ecdng trong y t\u1ebf, c\u00f4ng nghi\u1ec7p v\u00e0 \u0111\u1eddi s\u1ed1ng. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ea1o ra \u00e2m thanh si\u00eau \u00e2m, t\u1eeb nguy\u00ean l\u00fd c\u01a1 b\u1ea3n \u0111\u1ebfn c\u00e1c k\u1ef9 thu\u1eadt<\/p>\n","protected":false},"author":1,"featured_media":26472,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-49372","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","prodpage-classic"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/49372","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/comments?post=49372"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/49372\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/26472"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=49372"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=49372"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=49372"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}