{"id":45356,"date":"2023-04-22T02:57:19","date_gmt":"2023-04-22T07:57:19","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-make-ultrasonic-sound\/"},"modified":"2025-01-21T07:20:33","modified_gmt":"2025-01-21T12:20:33","slug":"how-to-make-ultrasonic-sound","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-to-make-ultrasonic-sound\/","title":{"rendered":"T\u1ea1o \u00e2m thanh si\u00eau \u00e2m: Ph\u01b0\u01a1ng ph\u00e1p v\u00e0 \u1ee9ng d\u1ee5ng"},"content":{"rendered":"<p>\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 \u0111\u1eddi s\u1ed1ng v\u00e0 khoa h\u1ecdc k\u1ef9 thu\u1eadt. T\u1eeb vi\u1ec7c ki\u1ec3m tra khuy\u1ebft t\u1eadt trong v\u1eadt li\u1ec7u, si\u00eau \u00e2m y t\u1ebf ch\u1ea9n \u0111o\u00e1n b\u1ec7nh, cho \u0111\u1ebfn l\u00e0m s\u1ea1ch \u0111\u1ed3 v\u1eadt, \u00e2m thanh si\u00eau \u00e2m \u0111\u1ec1u \u0111\u00f3ng vai tr\u00f2 kh\u00f4ng th\u1ec3 thi\u1ebfu. V\u1eady l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u1ea1o ra \u00e2m thanh si\u00eau \u00e2m? B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o t\u00ecm hi\u1ec3u c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ea1o ra lo\u1ea1i \u00e2m thanh \u0111\u1eb7c bi\u1ec7t n\u00e0y.<\/p>\n<h3>Nguy\u00ean L\u00fd T\u1ea1o \u00c2m Thanh Si\u00eau \u00c2m<\/h3>\n<p>\u00c2m thanh si\u00eau \u00e2m \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1eb1ng c\u00e1ch khai th\u00e1c hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n ho\u1eb7c t\u1eeb gi\u1ea3o. Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n l\u00e0 kh\u1ea3 n\u0103ng c\u1ee7a m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u (nh\u01b0 th\u1ea1ch anh, g\u1ed1m \u00e1p \u0111i\u1ec7n) bi\u1ebfn \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00e0nh n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. Hi\u1ec7u \u1ee9ng t\u1eeb gi\u1ea3o l\u00e0 s\u1ef1 thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng c\u1ee7a v\u1eadt li\u1ec7u s\u1eaft t\u1eeb d\u01b0\u1edbi t\u00e1c d\u1ee5ng c\u1ee7a t\u1eeb tr\u01b0\u1eddng.<\/p>\n<h3>S\u1eed D\u1ee5ng Hi\u1ec7u \u1ee8ng \u00c1p \u0110i\u1ec7n<\/h3>\n<p>Ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u1ec3 t\u1ea1o ra \u00e2m thanh si\u00eau \u00e2m l\u00e0 s\u1eed d\u1ee5ng c\u00e1c b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n. M\u1ed9t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u \u0111\u01b0\u1ee3c \u00e1p v\u00e0o tinh th\u1ec3 \u00e1p \u0111i\u1ec7n, khi\u1ebfn n\u00f3 dao \u0111\u1ed9ng v\u1edbi t\u1ea7n s\u1ed1 cao, t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m. T\u1ea7n s\u1ed1 c\u1ee7a s\u00f3ng si\u00eau \u00e2m \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi t\u1ea7n s\u1ed1 c\u1ee7a \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>\u0110\u1eb7c \u0111i\u1ec3m<\/th>\n<th>\u01afu \u0111i\u1ec3m<\/th>\n<th>Nh\u01b0\u1ee3c \u0111i\u1ec3m<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Hi\u1ec7u su\u1ea5t<\/td>\n<td>Cao<\/td>\n<td>C\u00f3 th\u1ec3 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec7t \u0111\u1ed9<\/td>\n<\/tr>\n<tr>\n<td>T\u1ea7n s\u1ed1<\/td>\n<td>R\u1ed9ng<\/td>\n<td>C\u1ea7n m\u1ea1ch \u0111i\u1ec7n ph\u1ee9c t\u1ea1p \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n<\/td>\n<\/tr>\n<tr>\n<td>K\u00edch th\u01b0\u1edbc<\/td>\n<td>Nh\u1ecf g\u1ecdn<\/td>\n<td>\u0110\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc c\u00f3 th\u1ec3 b\u1ecb h\u1ea1n ch\u1ebf<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>S\u1eed D\u1ee5ng Hi\u1ec7u \u1ee8ng T\u1eeb Gi\u1ea3o<\/h3>\n<p>Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u s\u1eaft t\u1eeb \u0111\u1eb7t trong m\u1ed9t t\u1eeb tr\u01b0\u1eddng bi\u1ebfn \u0111\u1ed5i. T\u1eeb tr\u01b0\u1eddng bi\u1ebfn \u0111\u1ed5i s\u1ebd l\u00e0m thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc c\u1ee7a v\u1eadt li\u1ec7u, t\u1ea1o ra dao \u0111\u1ed9ng c\u01a1 h\u1ecdc v\u00e0 ph\u00e1t ra s\u00f3ng si\u00eau \u00e2m.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>\u0110\u1eb7c \u0111i\u1ec3m<\/th>\n<th>\u01afu \u0111i\u1ec3m<\/th>\n<th>Nh\u01b0\u1ee3c \u0111i\u1ec3m<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Hi\u1ec7u su\u1ea5t<\/td>\n<td>Th\u1ea5p h\u01a1n \u00e1p \u0111i\u1ec7n<\/td>\n<td>\u0110\u01a1n gi\u1ea3n, chi ph\u00ed th\u1ea5p<\/td>\n<\/tr>\n<tr>\n<td>T\u1ea7n s\u1ed1<\/td>\n<td>H\u1ea1n ch\u1ebf \u1edf t\u1ea7n s\u1ed1 th\u1ea5p<\/td>\n<td>K\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n so v\u1edbi \u00e1p \u0111i\u1ec7n<\/td>\n<\/tr>\n<tr>\n<td>K\u00edch th\u01b0\u1edbc<\/td>\n<td>L\u1edbn<\/td>\n<td>Kh\u00f3 ki\u1ec3m so\u00e1t t\u1ea7n s\u1ed1 ch\u00ednh x\u00e1c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>C\u00e1c Y\u1ebfu T\u1ed1 \u1ea2nh H\u01b0\u1edfng \u0110\u1ebfn Ch\u1ea5t L\u01b0\u1ee3ng \u00c2m Thanh Si\u00eau \u00c2m<\/h3>\n<p>Ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a \u00e2m thanh si\u00eau \u00e2m \u0111\u01b0\u1ee3c t\u1ea1o ra ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1, bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>T\u1ea7n s\u1ed1:<\/strong> T\u1ea7n s\u1ed1 c\u00e0ng cao, \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u00e0ng t\u1ed1t nh\u01b0ng kh\u1ea3 n\u0103ng xuy\u00ean s\u00e2u c\u00e0ng k\u00e9m.<\/li>\n<li><strong>Bi\u00ean \u0111\u1ed9:<\/strong> Bi\u00ean \u0111\u1ed9 c\u00e0ng l\u1edbn, c\u01b0\u1eddng \u0111\u1ed9 \u00e2m thanh c\u00e0ng m\u1ea1nh.<\/li>\n<li><strong>H\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u01b0\u1edbc c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i:<\/strong>  \u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn h\u01b0\u1edbng v\u00e0 \u0111\u1ed9 t\u1eadp trung c\u1ee7a ch\u00f9m s\u00f3ng si\u00eau \u00e2m.<\/li>\n<li><strong>M\u00f4i tr\u01b0\u1eddng truy\u1ec1n \u00e2m:<\/strong>  T\u1ed1c \u0111\u1ed9 lan truy\u1ec1n v\u00e0 m\u1ee9c \u0111\u1ed9 h\u1ea5p th\u1ee5 \u00e2m thanh c\u1ee7a m\u00f4i tr\u01b0\u1eddng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u qu\u1ea3 c\u1ee7a \u1ee9ng d\u1ee5ng.<\/li>\n<\/ul>\n<p>T\u00f3m l\u1ea1i, vi\u1ec7c t\u1ea1o ra \u00e2m thanh si\u00eau \u00e2m \u0111\u00e3 v\u00e0 \u0111ang l\u00e0 m\u1ed9t l\u0129nh v\u1ef1c nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n quan tr\u1ecdng. S\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 nguy\u00ean l\u00fd v\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ea1o ra \u00e2m thanh si\u00eau \u00e2m l\u00e0 n\u1ec1n t\u1ea3ng cho vi\u1ec7c \u1ee9ng d\u1ee5ng c\u00f4ng ngh\u1ec7 n\u00e0y v\u00e0o nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau, t\u1eeb y t\u1ebf, c\u00f4ng nghi\u1ec7p \u0111\u1ebfn \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y.  Vi\u1ec7c l\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o y\u00eau c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a t\u1eebng \u1ee9ng d\u1ee5ng.  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 s\u1ebd ti\u1ebfp t\u1ee5c m\u1edf ra nh\u1eefng kh\u1ea3 n\u0103ng 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":"<p>\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 \u0111\u1eddi s\u1ed1ng v\u00e0 khoa h\u1ecdc k\u1ef9 thu\u1eadt. T\u1eeb vi\u1ec7c ki\u1ec3m tra khuy\u1ebft t\u1eadt trong v\u1eadt li\u1ec7u, si\u00eau \u00e2m y t\u1ebf ch\u1ea9n \u0111o\u00e1n b\u1ec7nh, cho \u0111\u1ebfn l\u00e0m s\u1ea1ch \u0111\u1ed3 v\u1eadt, \u00e2m thanh si\u00eau<\/p>\n","protected":false},"author":1,"featured_media":26473,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-45356","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\/45356","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=45356"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/45356\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/26473"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=45356"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=45356"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=45356"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}