{"id":49348,"date":"2023-04-21T22:22:19","date_gmt":"2023-04-22T03:22:19","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-generate-ultrasound\/"},"modified":"2025-01-21T07:16:12","modified_gmt":"2025-01-21T12:16:12","slug":"how-to-generate-ultrasound","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-to-generate-ultrasound\/","title":{"rendered":"K\u1ef9 thu\u1eadt t\u1ea1o s\u00f3ng si\u00eau \u00e2m: Nguy\u00ean l\u00fd v\u00e0 \u1ee9ng d\u1ee5ng"},"content":{"rendered":"<p>Si\u00eau \u00e2m, m\u1ed9t lo\u1ea1i s\u00f3ng \u00e2m thanh c\u00f3 t\u1ea7n s\u1ed1 cao h\u01a1n ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi, \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu trong nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb y t\u1ebf \u0111\u1ebfn c\u00f4ng nghi\u1ec7p. Vi\u1ec7c t\u1ea1o ra si\u00eau \u00e2m \u0111\u00f2i h\u1ecfi s\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 c\u00e1c nguy\u00ean l\u00fd v\u1eadt l\u00fd v\u00e0 c\u00f4ng ngh\u1ec7 \u0111\u1eb7c bi\u1ec7t. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o chi ti\u1ebft c\u00e1ch th\u1ee9c t\u1ea1o ra si\u00eau \u00e2m, bao g\u1ed3m c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang.<\/p>\n<h3>Nguy\u00ean l\u00fd t\u1ea1o si\u00eau \u00e2m<\/h3>\n<p>Si\u00eau \u00e2m \u0111\u01b0\u1ee3c t\u1ea1o ra d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n ho\u1eb7c hi\u1ec7u \u1ee9ng 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 hay 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 m\u1ed9t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u \u0111\u01b0\u1ee3c \u00e1p v\u00e0o v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, n\u00f3 s\u1ebd dao \u0111\u1ed9ng v\u1edbi t\u1ea7n s\u1ed1 c\u1ee7a \u0111i\u1ec7n \u00e1p, t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m. Hi\u1ec7u \u1ee9ng t\u1eeb gi\u1ea3o t\u01b0\u01a1ng t\u1ef1, nh\u01b0ng s\u1eed d\u1ee5ng t\u1eeb tr\u01b0\u1eddng thay v\u00ec \u0111i\u1ec7n tr\u01b0\u1eddng \u0111\u1ec3 t\u1ea1o ra s\u1ef1 dao \u0111\u1ed9ng.<\/p>\n<h3>Ph\u01b0\u01a1ng ph\u00e1p t\u1ea1o si\u00eau \u00e2m b\u1eb1ng hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n<\/h3>\n<p>\u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u1ec3 t\u1ea1o ra si\u00eau \u00e2m. M\u1ed9t b\u1ed9 chuy\u1ec3n \u0111\u1ed5i si\u00eau \u00e2m, th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111\u1ea7u d\u00f2, ch\u1ee9a m\u1ed9t tinh th\u1ec3 \u00e1p \u0111i\u1ec7n. Khi m\u1ed9t \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u \u0111\u01b0\u1ee3c \u00e1p v\u00e0o tinh th\u1ec3, n\u00f3 s\u1ebd dao \u0111\u1ed9ng v\u00e0 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 \u00e1p v\u00e0o.<\/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><\/td>\n<\/tr>\n<tr>\n<td>T\u1ea7n s\u1ed1<\/td>\n<td>R\u1ed9ng<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>K\u00edch th\u01b0\u1edbc<\/td>\n<td>\u0110a d\u1ea1ng<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>Gi\u00e1 th\u00e0nh<\/td>\n<td>H\u1ee3p l\u00fd<\/td>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Ph\u01b0\u01a1ng ph\u00e1p t\u1ea1o si\u00eau \u00e2m b\u1eb1ng hi\u1ec7u \u1ee9ng t\u1eeb gi\u1ea3o<\/h3>\n<p>Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u t\u1eeb gi\u1ea3o, c\u00f3 kh\u1ea3 n\u0103ng thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc khi \u0111\u1eb7t trong t\u1eeb tr\u01b0\u1eddng bi\u1ebfn thi\u00ean.  M\u1ed9t cu\u1ed9n d\u00e2y \u0111\u01b0\u1ee3c qu\u1ea5n quanh v\u1eadt li\u1ec7u t\u1eeb gi\u1ea3o. Khi d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u ch\u1ea1y qua cu\u1ed9n d\u00e2y, n\u00f3 t\u1ea1o ra t\u1eeb tr\u01b0\u1eddng bi\u1ebfn thi\u00ean, l\u00e0m v\u1eadt li\u1ec7u t\u1eeb gi\u1ea3o dao \u0111\u1ed9ng v\u00e0 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>Hi\u1ec7u su\u1ea5t<\/td>\n<td>Th\u1ea5p h\u01a1n \u00e1p \u0111i\u1ec7n<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>T\u1ea7n s\u1ed1<\/td>\n<td>H\u1ea1n ch\u1ebf<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>K\u00edch th\u01b0\u1edbc<\/td>\n<td>L\u1edbn<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>Gi\u00e1 th\u00e0nh<\/td>\n<td>Cao<\/td>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng si\u00eau \u00e2m<\/h3>\n<p>Ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a s\u00f3ng si\u00eau \u00e2m \u0111\u01b0\u1ee3c t\u1ea1o ra ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1, bao g\u1ed3m t\u1ea7n s\u1ed1, c\u01b0\u1eddng \u0111\u1ed9, v\u00e0 h\u00ecnh d\u1ea1ng c\u1ee7a \u0111\u1ea7u d\u00f2. T\u1ea7n s\u1ed1 c\u00e0ng cao, \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u00e0ng t\u1ed1t nh\u01b0ng \u0111\u1ed9 xuy\u00ean th\u1ea5u c\u00e0ng k\u00e9m. C\u01b0\u1eddng \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn n\u0103ng l\u01b0\u1ee3ng c\u1ee7a s\u00f3ng si\u00eau \u00e2m. H\u00ecnh d\u1ea1ng c\u1ee7a \u0111\u1ea7u d\u00f2 quy\u1ebft \u0111\u1ecbnh h\u01b0\u1edbng v\u00e0 \u0111\u1ed9 t\u1eadp trung c\u1ee7a ch\u00f9m si\u00eau \u00e2m.<\/p>\n<h3>\u1ee8ng d\u1ee5ng c\u1ee7a si\u00eau \u00e2m<\/h3>\n<p>Si\u00eau \u00e2m c\u00f3 r\u1ea5t nhi\u1ec1u \u1ee9ng d\u1ee5ng trong cu\u1ed9c s\u1ed1ng, t\u1eeb y t\u1ebf (ch\u1ea9n \u0111o\u00e1n h\u00ecnh \u1ea3nh, \u0111i\u1ec1u tr\u1ecb ung th\u01b0), c\u00f4ng nghi\u1ec7p (ki\u1ec3m tra v\u1eadt li\u1ec7u, h\u00e0n si\u00eau \u00e2m, l\u00e0m s\u1ea1ch) \u0111\u1ebfn h\u00e0ng h\u1ea3i (sonar). V\u00ed d\u1ee5, trong y t\u1ebf, si\u00eau \u00e2m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o h\u00ecnh \u1ea3nh c\u1ee7a c\u00e1c c\u01a1 quan b\u00ean trong c\u01a1 th\u1ec3, gi\u00fap ch\u1ea9n \u0111o\u00e1n c\u00e1c b\u1ec7nh l\u00fd. Trong c\u00f4ng nghi\u1ec7p, si\u00eau \u00e2m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra khuy\u1ebft t\u1eadt trong v\u1eadt li\u1ec7u.<\/p>\n<p>T\u00f3m l\u1ea1i, vi\u1ec7c t\u1ea1o ra si\u00eau \u00e2m d\u1ef1a tr\u00ean c\u00e1c nguy\u00ean l\u00fd v\u1eadt l\u00fd nh\u01b0 hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n v\u00e0 hi\u1ec7u \u1ee9ng t\u1eeb gi\u1ea3o.  Ph\u01b0\u01a1ng ph\u00e1p \u00e1p \u0111i\u1ec7n l\u00e0 ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n.  Vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c nguy\u00ean l\u00fd n\u00e0y v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng si\u00eau \u00e2m l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u1ee9ng d\u1ee5ng si\u00eau \u00e2m m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 trong c\u00e1c l\u0129nh v\u1ef1c kh\u00e1c nhau.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Si\u00eau \u00e2m, m\u1ed9t lo\u1ea1i s\u00f3ng \u00e2m thanh c\u00f3 t\u1ea7n s\u1ed1 cao h\u01a1n ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi, \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu trong nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb y t\u1ebf \u0111\u1ebfn c\u00f4ng nghi\u1ec7p. Vi\u1ec7c t\u1ea1o ra si\u00eau \u00e2m \u0111\u00f2i h\u1ecfi s\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 c\u00e1c nguy\u00ean l\u00fd v\u1eadt l\u00fd v\u00e0 c\u00f4ng ngh\u1ec7<\/p>\n","protected":false},"author":1,"featured_media":26471,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-49348","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\/49348","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=49348"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/49348\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/26471"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=49348"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=49348"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=49348"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}