{"id":44724,"date":"2023-04-25T14:26:43","date_gmt":"2023-04-25T19:26:43","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/what-materials-block-ultrasonic-sound-waves\/"},"modified":"2025-01-21T07:29:54","modified_gmt":"2025-01-21T12:29:54","slug":"what-materials-block-ultrasonic-sound-waves","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/what-materials-block-ultrasonic-sound-waves\/","title":{"rendered":"V\u1eadt li\u1ec7u n\u00e0o ng\u0103n ch\u1eb7n s\u00f3ng si\u00eau \u00e2m hi\u1ec7u qu\u1ea3?"},"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, \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i 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 hi\u1ec3u r\u00f5 kh\u1ea3 n\u0103ng truy\u1ec1n \u00e2m v\u00e0 \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c v\u1eadt li\u1ec7u c\u00f3 kh\u1ea3 n\u0103ng ng\u0103n ch\u1eb7n s\u00f3ng si\u00eau \u00e2m l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng v\u00e0 \u0111\u1ea3m b\u1ea3o an to\u00e0n.  B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o ph\u00e2n t\u00edch c\u00e1c v\u1eadt li\u1ec7u kh\u00e1c nhau v\u00e0 kh\u1ea3 n\u0103ng c\u1ea3n tr\u1edf s\u00f3ng si\u00eau \u00e2m c\u1ee7a ch\u00fang.<\/p>\n<h3>V\u1eadt li\u1ec7u x\u1ed1p v\u00e0 s\u1ee3i<\/h3>\n<p>V\u1eadt li\u1ec7u x\u1ed1p nh\u01b0 b\u00f4ng, len, m\u00fat x\u1ed1p, cao su non&#8230; c\u00f3 c\u1ea5u tr\u00fac ch\u1ee9a nhi\u1ec1u l\u1ed7 kh\u00ed nh\u1ecf.  Ch\u00ednh c\u1ea5u tr\u00fac n\u00e0y gi\u00fap ch\u00fang h\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng c\u1ee7a s\u00f3ng si\u00eau \u00e2m th\u00f4ng qua ma s\u00e1t v\u00e0 t\u00e1n x\u1ea1.  S\u00f3ng \u00e2m b\u1ecb m\u1eafc k\u1eb9t v\u00e0 chuy\u1ec3n h\u00f3a th\u00e0nh nhi\u1ec7t n\u0103ng, l\u00e0m gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 \u00e2m thanh truy\u1ec1n qua.  V\u1eadt li\u1ec7u s\u1ee3i nh\u01b0 v\u1ea3i n\u1ec9, b\u00f4ng th\u1ee7y tinh c\u0169ng c\u00f3 c\u01a1 ch\u1ebf t\u01b0\u01a1ng t\u1ef1, tuy nhi\u00ean hi\u1ec7u qu\u1ea3 h\u1ea5p th\u1ee5 ph\u1ee5 thu\u1ed9c v\u00e0o m\u1eadt \u0111\u1ed9 v\u00e0 \u0111\u1ed9 d\u00e0y c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n<h3>Kim lo\u1ea1i<\/h3>\n<p>Kim lo\u1ea1i, v\u1edbi m\u1eadt \u0111\u1ed9 cao v\u00e0 c\u1ea5u tr\u00fac tinh th\u1ec3 ch\u1eb7t ch\u1ebd, l\u00e0 v\u1eadt li\u1ec7u ph\u1ea3n x\u1ea1 s\u00f3ng si\u00eau \u00e2m r\u1ea5t t\u1ed1t.  B\u1ec1 m\u1eb7t nh\u1eb5n b\u00f3ng c\u1ee7a kim lo\u1ea1i c\u00e0ng l\u00e0m t\u0103ng kh\u1ea3 n\u0103ng ph\u1ea3n x\u1ea1.  V\u00ed d\u1ee5, th\u00e9p kh\u00f4ng g\u1ec9, nh\u00f4m, \u0111\u1ed3ng \u0111\u1ec1u ph\u1ea3n x\u1ea1 ph\u1ea7n l\u1edbn n\u0103ng l\u01b0\u1ee3ng si\u00eau \u00e2m.  \u0110i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong c\u00e1c thi\u1ebft b\u1ecb si\u00eau \u00e2m c\u00f4ng nghi\u1ec7p \u0111\u1ec3 ki\u1ec3m tra khuy\u1ebft t\u1eadt trong kim lo\u1ea1i.<\/p>\n<h3>Nh\u1ef1a v\u00e0 Polymer<\/h3>\n<p>Kh\u1ea3 n\u0103ng ch\u1eb7n s\u00f3ng si\u00eau \u00e2m c\u1ee7a nh\u1ef1a v\u00e0 polymer r\u1ea5t \u0111a d\u1ea1ng, ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i nh\u1ef1a, m\u1eadt \u0111\u1ed9 v\u00e0 \u0111\u1ed9 d\u00e0y. Nh\u1ef1a c\u1ee9ng, \u0111\u1eb7c th\u01b0\u1eddng ph\u1ea3n x\u1ea1 s\u00f3ng si\u00eau \u00e2m t\u1ed1t h\u01a1n nh\u1ef1a m\u1ec1m, x\u1ed1p.  M\u1ed9t s\u1ed1 lo\u1ea1i polymer \u0111\u1eb7c bi\u1ec7t \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 h\u1ea5p th\u1ee5 s\u00f3ng si\u00eau \u00e2m.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Lo\u1ea1i Nh\u1ef1a<\/th>\n<th>Kh\u1ea3 n\u0103ng ch\u1eb7n s\u00f3ng si\u00eau \u00e2m<\/th>\n<th>\u1ee8ng d\u1ee5ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Polyetylen (PE)<\/td>\n<td>Trung b\u00ecnh<\/td>\n<td>Bao b\u00ec<\/td>\n<\/tr>\n<tr>\n<td>Polypropylen (PP)<\/td>\n<td>Trung b\u00ecnh<\/td>\n<td>\u0110\u1ed3 gia d\u1ee5ng<\/td>\n<\/tr>\n<tr>\n<td>Polyvinyl Clorua (PVC)<\/td>\n<td>Kh\u00e1 t\u1ed1t<\/td>\n<td>\u1ed0ng n\u01b0\u1edbc<\/td>\n<\/tr>\n<tr>\n<td>Teflon (PTFE)<\/td>\n<td>T\u1ed1t<\/td>\n<td>L\u1edbp ch\u1ed1ng d\u00ednh<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Ch\u1ea5t l\u1ecfng<\/h3>\n<p>Ch\u1ea5t l\u1ecfng n\u00f3i chung kh\u00f4ng ph\u1ea3i l\u00e0 v\u1eadt li\u1ec7u ch\u1eb7n s\u00f3ng si\u00eau \u00e2m hi\u1ec7u qu\u1ea3.  N\u01b0\u1edbc, d\u1ea7u, v\u00e0 c\u00e1c dung d\u1ecbch kh\u00e1c truy\u1ec1n s\u00f3ng si\u00eau \u00e2m kh\u00e1 t\u1ed1t. Tuy nhi\u00ean, s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a c\u00e1c b\u1ecdt kh\u00ed trong ch\u1ea5t l\u1ecfng c\u00f3 th\u1ec3 l\u00e0m t\u0103ng kh\u1ea3 n\u0103ng t\u00e1n x\u1ea1 v\u00e0 h\u1ea5p th\u1ee5 s\u00f3ng si\u00eau \u00e2m.<\/p>\n<h3>V\u1eadt li\u1ec7u composite<\/h3>\n<p>V\u1eadt li\u1ec7u composite l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a nhi\u1ec1u lo\u1ea1i v\u1eadt li\u1ec7u kh\u00e1c nhau, do \u0111\u00f3 kh\u1ea3 n\u0103ng ch\u1eb7n s\u00f3ng si\u00eau \u00e2m c\u1ee7a ch\u00fang ph\u1ee5 thu\u1ed9c v\u00e0o th\u00e0nh ph\u1ea7n v\u00e0 c\u1ea5u tr\u00fac c\u1ee7a composite.  V\u00ed d\u1ee5, composite k\u1ebft h\u1ee3p gi\u1eefa kim lo\u1ea1i v\u00e0 polymer c\u00f3 th\u1ec3 v\u1eeba ph\u1ea3n x\u1ea1 v\u1eeba h\u1ea5p th\u1ee5 s\u00f3ng si\u00eau \u00e2m.<\/p>\n<p>Vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u ch\u1eb7n s\u00f3ng si\u00eau \u00e2m ph\u1ee5 thu\u1ed9c v\u00e0o \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.  \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng y t\u1ebf, v\u1eadt li\u1ec7u c\u1ea7n c\u00f3 kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 t\u1ed1t \u0111\u1ec3 gi\u1ea3m thi\u1ec3u t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn c\u00e1c m\u00f4 xung quanh. Trong c\u00f4ng nghi\u1ec7p, v\u1eadt li\u1ec7u ph\u1ea3n x\u1ea1 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra khuy\u1ebft t\u1eadt.  Hi\u1ec3u r\u00f5 \u0111\u1eb7c t\u00ednh c\u1ee7a t\u1eebng lo\u1ea1i v\u1eadt li\u1ec7u 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>\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, \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i 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 hi\u1ec3u r\u00f5 kh\u1ea3 n\u0103ng truy\u1ec1n \u00e2m v\u00e0 \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c v\u1eadt li\u1ec7u c\u00f3 kh\u1ea3 n\u0103ng ng\u0103n ch\u1eb7n s\u00f3ng si\u00eau \u00e2m<\/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-44724","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\/44724","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=44724"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/44724\/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=44724"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=44724"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=44724"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}