{"id":47548,"date":"2023-04-22T00:13:03","date_gmt":"2023-04-22T05:13:03","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-make-ultrasonic-waves\/"},"modified":"2025-01-21T07:20:39","modified_gmt":"2025-01-21T12:20:39","slug":"how-to-make-ultrasonic-waves","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-to-make-ultrasonic-waves\/","title":{"rendered":"T\u1ea1o s\u00f3ng si\u00eau \u00e2m: Ph\u01b0\u01a1ng ph\u00e1p v\u00e0 \u1ee9ng d\u1ee5ng"},"content":{"rendered":"<p>Si\u00eau \u00e2m, v\u1edbi t\u1ea7n s\u1ed1 v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi, \u0111\u00e3 v\u00e0 \u0111ang \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb y t\u1ebf, c\u00f4ng nghi\u1ec7p \u0111\u1ebfn \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y. Vi\u1ec7c t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m \u0111\u00f2i h\u1ecfi s\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 nguy\u00ean l\u00fd v\u1eadt l\u00fd v\u00e0 \u1ee9ng d\u1ee5ng c\u00f4ng ngh\u1ec7 ph\u00f9 h\u1ee3p. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m, c\u00f9ng v\u1edbi nh\u1eefng \u01b0u nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a t\u1eebng ph\u01b0\u01a1ng ph\u00e1p.<\/p>\n<h3>S\u1eed d\u1ee5ng hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n<\/h3>\n<p>Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n l\u00e0 m\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u1ec3 t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m.  Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean 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. Khi \u00e1p m\u1ed9t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u v\u00e0o v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, n\u00f3 s\u1ebd dao \u0111\u1ed9ng v\u1edbi t\u1ea7n s\u1ed1 t\u01b0\u01a1ng \u1ee9ng, t\u1ea1o 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>T\u1ea7n s\u1ed1<\/td>\n<td>R\u1ed9ng, d\u1ec5 \u0111i\u1ec1u ch\u1ec9nh<\/td>\n<td>Hi\u1ec7u su\u1ea5t gi\u1ea3m \u1edf t\u1ea7n s\u1ed1 r\u1ea5t cao<\/td>\n<\/tr>\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>K\u00edch th\u01b0\u1edbc<\/td>\n<td>Nh\u1ecf g\u1ecdn<\/td>\n<td>Gi\u1edbi h\u1ea1n v\u1ec1 c\u00f4ng su\u1ea5t \u1edf k\u00edch th\u01b0\u1edbc nh\u1ecf<\/td>\n<\/tr>\n<tr>\n<td>Chi ph\u00ed<\/td>\n<td>T\u01b0\u01a1ng \u0111\u1ed1i th\u1ea5p<\/td>\n<td>V\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n c\u00f3 th\u1ec3 b\u1ecb l\u00e3o h\u00f3a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>S\u1eed d\u1ee5ng hi\u1ec7u \u1ee9ng t\u1eeb gi\u1ea3o<\/h3>\n<p>Hi\u1ec7u \u1ee9ng t\u1eeb gi\u1ea3o x\u1ea3y ra khi m\u1ed9t v\u1eadt li\u1ec7u t\u1eeb t\u00ednh thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a t\u1eeb tr\u01b0\u1eddng. 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 t\u1ea1o ra dao \u0111\u1ed9ng c\u01a1 h\u1ecdc v\u00e0 t\u1eeb \u0111\u00f3 t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi c\u00f4ng su\u1ea5t cao.<\/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>C\u00f4ng su\u1ea5t<\/td>\n<td>Cao<\/td>\n<td>K\u00edch th\u01b0\u1edbc l\u1edbn<\/td>\n<\/tr>\n<tr>\n<td>T\u1ea7n s\u1ed1<\/td>\n<td>Th\u1ea5p h\u01a1n so v\u1edbi \u00e1p \u0111i\u1ec7n<\/td>\n<td>Hi\u1ec7u su\u1ea5t gi\u1ea3m \u1edf t\u1ea7n s\u1ed1 cao<\/td>\n<\/tr>\n<tr>\n<td>Hi\u1ec7u su\u1ea5t<\/td>\n<td>Trung b\u00ecnh<\/td>\n<td>Nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng b\u1ecb gi\u1edbi h\u1ea1n<\/td>\n<\/tr>\n<tr>\n<td>Chi ph\u00ed<\/td>\n<td>Cao<\/td>\n<td>C\u1ea5u tr\u00fac ph\u1ee9c t\u1ea1p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>S\u1eed d\u1ee5ng hi\u1ec7u \u1ee9ng \u0111i\u1ec7n gi\u1ea3o<\/h3>\n<p>T\u01b0\u01a1ng t\u1ef1 nh\u01b0 hi\u1ec7u \u1ee9ng t\u1eeb gi\u1ea3o, hi\u1ec7u \u1ee9ng \u0111i\u1ec7n gi\u1ea3o l\u00e0 s\u1ef1 thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc c\u1ee7a v\u1eadt li\u1ec7u d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a \u0111i\u1ec7n tr\u01b0\u1eddng.  Tuy nhi\u00ean, hi\u1ec7u \u1ee9ng n\u00e0y th\u01b0\u1eddng y\u1ebfu h\u01a1n so v\u1edbi hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n v\u00e0 \u00edt \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong vi\u1ec7c t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m.<\/p>\n<h3>Ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c<\/h3>\n<p>Ngo\u00e0i ba ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh tr\u00ean, c\u00f2n c\u00f3 m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c \u0111\u1ec3 t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m, v\u00ed d\u1ee5 nh\u01b0 s\u1eed d\u1ee5ng s\u00f3ng xung k\u00edch, laser ho\u1eb7c tia n\u01b0\u1edbc. Tuy nhi\u00ean, c\u00e1c ph\u01b0\u01a1ng ph\u00e1p n\u00e0y th\u01b0\u1eddng ph\u1ee9c t\u1ea1p h\u01a1n v\u00e0 \u00edt \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng th\u00f4ng th\u01b0\u1eddng.<\/p>\n<p>T\u00f3m l\u1ea1i, vi\u1ec7c t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m c\u00f3 th\u1ec3 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 nh\u1eefng \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 y\u00eau c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a t\u1eebng \u1ee9ng d\u1ee5ng, bao g\u1ed3m t\u1ea7n s\u1ed1, c\u00f4ng su\u1ea5t, k\u00edch th\u01b0\u1edbc v\u00e0 chi ph\u00ed. Hi\u1ec3u r\u00f5 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a t\u1eebng ph\u01b0\u01a1ng ph\u00e1p s\u1ebd gi\u00fap t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng s\u00f3ng si\u00eau \u00e2m trong c\u00e1c l\u0129nh v\u1ef1c kh\u00e1c nhau.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Si\u00eau \u00e2m, v\u1edbi t\u1ea7n s\u1ed1 v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi, \u0111\u00e3 v\u00e0 \u0111ang \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb y t\u1ebf, c\u00f4ng nghi\u1ec7p \u0111\u1ebfn \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y. Vi\u1ec7c t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m \u0111\u00f2i h\u1ecfi s\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 nguy\u00ean l\u00fd v\u1eadt l\u00fd v\u00e0 \u1ee9ng d\u1ee5ng c\u00f4ng ngh\u1ec7<\/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-47548","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\/47548","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=47548"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/47548\/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=47548"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=47548"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=47548"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}