{"id":44204,"date":"2023-04-25T16:20:47","date_gmt":"2023-04-25T21:20:47","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/what-is-a-piezo-speaker\/"},"modified":"2025-01-21T07:28:16","modified_gmt":"2025-01-21T12:28:16","slug":"what-is-a-piezo-speaker","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/what-is-a-piezo-speaker\/","title":{"rendered":"Loa Piezo l\u00e0 g\u00ec? Kh\u00e1m ph\u00e1 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng"},"content":{"rendered":"<p>Loa piezo, hay c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 loa g\u1ed1m, l\u00e0 m\u1ed9t lo\u1ea1i loa d\u1ef1a tr\u00ean t\u00ednh ch\u1ea5t \u00e1p \u0111i\u1ec7n c\u1ee7a m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u nh\u1ea5t \u0111\u1ecbnh, \u0111i\u1ec3n h\u00ecnh l\u00e0 g\u1ed1m. T\u00ednh ch\u1ea5t n\u00e0y cho ph\u00e9p v\u1eadt li\u1ec7u t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi ch\u1ecbu \u00e1p l\u1ef1c c\u01a1 h\u1ecdc v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, bi\u1ebfn \u0111\u1ed5i \u0111i\u1ec7n \u00e1p th\u00e0nh rung \u0111\u1ed9ng c\u01a1 h\u1ecdc.  Nh\u1edd nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed9c \u0111\u00e1o n\u00e0y, loa piezo c\u00f3 th\u1ec3 t\u1ea1o ra \u00e2m thanh t\u1eeb t\u00edn hi\u1ec7u \u0111i\u1ec7n.  Ch\u00fang ta s\u1ebd c\u00f9ng t\u00ecm hi\u1ec3u s\u00e2u h\u01a1n v\u1ec1 c\u1ea5u t\u1ea1o, nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng, \u01b0u nh\u01b0\u1ee3c \u0111i\u1ec3m v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a lo\u1ea1i loa n\u00e0y.<\/p>\n<h3>C\u1ea5u t\u1ea1o c\u1ee7a loa Piezo<\/h3>\n<p>Loa piezo th\u01b0\u1eddng bao g\u1ed3m m\u1ed9t m\u00e0ng diaphragm l\u00e0m t\u1eeb v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, th\u01b0\u1eddng l\u00e0 g\u1ed1m PZT (ch\u00ec zirconat titanat), \u0111\u01b0\u1ee3c g\u1eafn li\u1ec1n v\u1edbi m\u1ed9t mi\u1ebfng kim lo\u1ea1i m\u1ecfng.  Mi\u1ebfng kim lo\u1ea1i n\u00e0y \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t \u0111i\u1ec7n c\u1ef1c, v\u00e0 khi m\u1ed9t t\u00edn hi\u1ec7u \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c \u00e1p v\u00e0o, v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n s\u1ebd bi\u1ebfn d\u1ea1ng, l\u00e0m rung m\u00e0ng diaphragm v\u00e0 t\u1ea1o ra s\u00f3ng \u00e2m. C\u1ea5u t\u1ea1o \u0111\u01a1n gi\u1ea3n n\u00e0y gi\u00fap loa piezo c\u00f3 k\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn v\u00e0 chi ph\u00ed s\u1ea3n xu\u1ea5t th\u1ea5p.<\/p>\n<h3>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng<\/h3>\n<p>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a loa piezo d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n. Khi m\u1ed9t \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c \u00e1p v\u00e0o v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, n\u00f3 s\u1ebd thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng. S\u1ef1 thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng n\u00e0y di\u1ec5n ra r\u1ea5t nhanh, theo t\u1ea7n s\u1ed1 c\u1ee7a t\u00edn hi\u1ec7u \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o.  S\u1ef1 bi\u1ebfn d\u1ea1ng c\u1ee7a v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n l\u00e0m cho m\u00e0ng diaphragm rung \u0111\u1ed9ng, t\u1ea1o ra s\u00f3ng \u00e2m trong kh\u00f4ng kh\u00ed.  T\u1ea7n s\u1ed1 c\u1ee7a s\u00f3ng \u00e2m n\u00e0y t\u01b0\u01a1ng \u1ee9ng v\u1edbi t\u1ea7n s\u1ed1 c\u1ee7a t\u00edn hi\u1ec7u \u0111i\u1ec7n \u00e1p, cho ph\u00e9p loa piezo t\u00e1i t\u1ea1o \u00e2m thanh.<\/p>\n<h3>\u01afu \u0111i\u1ec3m c\u1ee7a loa Piezo<\/h3>\n<ul>\n<li><strong>K\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn:<\/strong> Loa piezo c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o v\u1edbi k\u00edch th\u01b0\u1edbc r\u1ea5t nh\u1ecf, ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c thi\u1ebft b\u1ecb di \u0111\u1ed9ng.<\/li>\n<li><strong>Chi ph\u00ed th\u1ea5p:<\/strong>  Qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t loa piezo t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u01a1n gi\u1ea3n, d\u1eabn \u0111\u1ebfn chi ph\u00ed s\u1ea3n xu\u1ea5t th\u1ea5p.<\/li>\n<li><strong>\u0110\u1ed9 b\u1ec1n cao:<\/strong> Loa piezo c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu t\u1ed1t v\u1edbi m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t, \u0111\u1ed9 \u1ea9m v\u00e0 b\u1ee5i b\u1ea9n.<\/li>\n<li><strong>D\u1ec5 d\u00e0ng \u0111i\u1ec1u khi\u1ec3n:<\/strong>  Vi\u1ec7c \u0111i\u1ec1u khi\u1ec3n loa piezo kh\u00e1 \u0111\u01a1n gi\u1ea3n, ch\u1ec9 c\u1ea7n m\u1ed9t t\u00edn hi\u1ec7u \u0111i\u1ec7n \u00e1p.<\/li>\n<\/ul>\n<h3>Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a loa Piezo<\/h3>\n<ul>\n<li><strong>Ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh h\u1ea1n ch\u1ebf:<\/strong> Loa piezo th\u01b0\u1eddng c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh k\u00e9m h\u01a1n so v\u1edbi c\u00e1c lo\u1ea1i loa kh\u00e1c, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf d\u1ea3i t\u1ea7n th\u1ea5p. \u00c2m thanh th\u01b0\u1eddng b\u1ecb m\u00e9o ti\u1ebfng v\u00e0 thi\u1ebfu bass.<\/li>\n<li><strong>\u0110\u1ed9 nh\u1ea1y th\u1ea5p:<\/strong> Loa piezo c\u1ea7n m\u1ed9t t\u00edn hi\u1ec7u \u0111i\u1ec7n \u00e1p t\u01b0\u01a1ng \u0111\u1ed1i cao \u0111\u1ec3 t\u1ea1o ra \u00e2m l\u01b0\u1ee3ng l\u1edbn.<\/li>\n<\/ul>\n<h3>\u1ee8ng d\u1ee5ng c\u1ee7a loa Piezo<\/h3>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>\u1ee8ng d\u1ee5ng<\/th>\n<th>M\u00f4 t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u0110\u1ed3ng h\u1ed3 b\u00e1o th\u1ee9c<\/td>\n<td>T\u1ea1o \u00e2m thanh b\u00e1o th\u1ee9c<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ed3 ch\u01a1i \u0111i\u1ec7n t\u1eed<\/td>\n<td>Ph\u00e1t ra \u00e2m thanh hi\u1ec7u \u1ee9ng<\/td>\n<\/tr>\n<tr>\n<td>Thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed nh\u1ecf<\/td>\n<td>C\u1ea3nh b\u00e1o, th\u00f4ng b\u00e1o<\/td>\n<\/tr>\n<tr>\n<td>Loa si\u00eau \u00e2m<\/td>\n<td>Trong m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3, v\u00ed d\u1ee5 nh\u01b0 l\u00e0m s\u1ea1ch b\u1eb1ng si\u00eau \u00e2m, v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Loa piezo l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn trong c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u k\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn, chi ph\u00ed th\u1ea5p v\u00e0 \u0111\u1ed9 b\u1ec1n cao. Tuy nhi\u00ean, n\u1ebfu ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng, th\u00ec n\u00ean c\u00e2n nh\u1eafc s\u1eed d\u1ee5ng c\u00e1c lo\u1ea1i loa kh\u00e1c.  S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng ngh\u1ec7 v\u1eadt li\u1ec7u v\u00e0 k\u1ef9 thu\u1eadt ch\u1ebf t\u1ea1o \u0111ang d\u1ea7n c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh c\u1ee7a loa piezo, m\u1edf ra nhi\u1ec1u ti\u1ec1m n\u0103ng \u1ee9ng d\u1ee5ng h\u01a1n trong t\u01b0\u01a1ng lai.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Loa piezo, hay c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 loa g\u1ed1m, l\u00e0 m\u1ed9t lo\u1ea1i loa d\u1ef1a tr\u00ean t\u00ednh ch\u1ea5t \u00e1p \u0111i\u1ec7n c\u1ee7a m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u nh\u1ea5t \u0111\u1ecbnh, \u0111i\u1ec3n h\u00ecnh l\u00e0 g\u1ed1m. T\u00ednh ch\u1ea5t n\u00e0y cho ph\u00e9p v\u1eadt li\u1ec7u t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi ch\u1ecbu \u00e1p l\u1ef1c c\u01a1 h\u1ecdc v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, bi\u1ebfn \u0111\u1ed5i \u0111i\u1ec7n \u00e1p th\u00e0nh<\/p>\n","protected":false},"author":1,"featured_media":26935,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-44204","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\/44204","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=44204"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/44204\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/26935"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=44204"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=44204"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=44204"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}