{"id":44500,"date":"2023-04-25T14:48:59","date_gmt":"2023-04-25T19:48:59","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/what-is-piezoelectric-speaker\/"},"modified":"2025-01-21T07:28:56","modified_gmt":"2025-01-21T12:28:56","slug":"what-is-piezoelectric-speaker","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/what-is-piezoelectric-speaker\/","title":{"rendered":"Loa \u00e1p \u0111i\u1ec7n: Nguy\u00ean li\u1ec7u, c\u1ea5u t\u1ea1o v\u00e0 ho\u1ea1t \u0111\u1ed9ng"},"content":{"rendered":"<p>Loa \u00e1p \u0111i\u1ec7n, m\u1ed9t c\u00f4ng ngh\u1ec7 \u00e2m thanh quen thu\u1ed9c nh\u01b0ng kh\u00f4ng ph\u1ea3i ai c\u0169ng hi\u1ec3u r\u00f5 v\u1ec1 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3. T\u1eeb nh\u1eefng chi\u1ebfc \u0111\u1ed3ng h\u1ed3 b\u00e1o th\u1ee9c nh\u1ecf g\u1ecdn \u0111\u1ebfn nh\u1eefng h\u1ec7 th\u1ed1ng \u00e2m thanh ph\u1ee9c t\u1ea1p, loa \u00e1p \u0111i\u1ec7n \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c t\u00e1i t\u1ea1o \u00e2m thanh. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o t\u00ecm hi\u1ec3u loa \u00e1p \u0111i\u1ec7n l\u00e0 g\u00ec, 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 n\u00f3 trong \u0111\u1eddi s\u1ed1ng.<\/p>\n<h3>C\u1ea5u t\u1ea1o c\u1ee7a loa \u00e1p \u0111i\u1ec7n<\/h3>\n<p>Loa \u00e1p \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, t\u1ee9c l\u00e0 kh\u1ea3 n\u0103ng c\u1ee7a m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u nh\u1ea5t \u0111\u1ecbnh 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. C\u1ea5u t\u1ea1o c\u01a1 b\u1ea3n c\u1ee7a m\u1ed9t loa \u00e1p \u0111i\u1ec7n bao g\u1ed3m m\u1ed9t mi\u1ebfng v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, th\u01b0\u1eddng l\u00e0 g\u1ed1m \u00e1p \u0111i\u1ec7n, \u0111\u01b0\u1ee3c k\u1eb9p gi\u1eefa hai \u0111i\u1ec7n c\u1ef1c.  Khi t\u00edn hi\u1ec7u \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o hai \u0111i\u1ec7n c\u1ef1c, v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n s\u1ebd bi\u1ebfn d\u1ea1ng, t\u1ea1o ra rung \u0111\u1ed9ng v\u00e0 ph\u00e1t ra \u00e2m thanh.<\/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 \u00e1p \u0111i\u1ec7n d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n ngh\u1ecbch. Khi m\u1ed9t t\u00edn hi\u1ec7u \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o hai \u0111i\u1ec7n c\u1ef1c c\u1ee7a v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, \u0111i\u1ec7n tr\u01b0\u1eddng t\u1ea1o ra s\u1ebd l\u00e0m thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc c\u1ee7a v\u1eadt li\u1ec7u. S\u1ef1 thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc n\u00e0y di\u1ec5n ra theo t\u1ea7n s\u1ed1 c\u1ee7a t\u00edn hi\u1ec7u \u0111i\u1ec7n \u00e1p, khi\u1ebfn v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n rung \u0111\u1ed9ng v\u00e0 t\u1ea1o ra s\u00f3ng \u00e2m t\u01b0\u01a1ng \u1ee9ng. T\u1ea7n s\u1ed1 v\u00e0 bi\u00ean \u0111\u1ed9 c\u1ee7a s\u00f3ng \u00e2m ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 v\u00e0 bi\u00ean \u0111\u1ed9 c\u1ee7a t\u00edn hi\u1ec7u \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o.<\/p>\n<h3>\u01afu \u0111i\u1ec3m c\u1ee7a loa \u00e1p \u0111i\u1ec7n<\/h3>\n<p>Loa \u00e1p \u0111i\u1ec7n s\u1edf h\u1eefu nhi\u1ec1u \u01b0u \u0111i\u1ec3m so v\u1edbi c\u00e1c lo\u1ea1i loa kh\u00e1c, bao g\u1ed3m:<\/p>\n<ul>\n<li>K\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn, tr\u1ecdng l\u01b0\u1ee3ng nh\u1eb9, d\u1ec5 t\u00edch h\u1ee3p v\u00e0o c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed.<\/li>\n<li>\u0110\u1ed9 nh\u1ea1y cao, c\u00f3 th\u1ec3 t\u1ea1o ra \u00e2m thanh l\u1edbn t\u1eeb t\u00edn hi\u1ec7u \u0111i\u1ec7n \u00e1p nh\u1ecf.<\/li>\n<li>C\u1ea5u t\u1ea1o \u0111\u01a1n gi\u1ea3n, \u0111\u1ed9 b\u1ec1n cao, \u00edt b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi m\u00f4i tr\u01b0\u1eddng.<\/li>\n<li>Ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng th\u1ea5p, ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c thi\u1ebft b\u1ecb di \u0111\u1ed9ng.<\/li>\n<\/ul>\n<h3>Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a loa \u00e1p \u0111i\u1ec7n<\/h3>\n<p>B\u00ean c\u1ea1nh nh\u1eefng \u01b0u \u0111i\u1ec3m, loa \u00e1p \u0111i\u1ec7n c\u0169ng t\u1ed3n t\u1ea1i m\u1ed9t s\u1ed1 nh\u01b0\u1ee3c \u0111i\u1ec3m:<\/p>\n<ul>\n<li>D\u1ea3i t\u1ea7n s\u1ed1 h\u1eb9p, kh\u00f3 t\u00e1i t\u1ea1o \u00e2m tr\u1ea7m s\u00e2u v\u00e0 \u00e2m cao trong tr\u1ebbo.<\/li>\n<li>Ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh kh\u00f4ng cao b\u1eb1ng loa \u0111i\u1ec7n \u0111\u1ed9ng ho\u1eb7c loa t\u0129nh \u0111i\u1ec7n, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf \u00e2m l\u01b0\u1ee3ng l\u1edbn.<\/li>\n<li>\u0110\u1ed9 m\u00e9o ti\u1ebfng cao h\u01a1n so v\u1edbi c\u00e1c lo\u1ea1i loa kh\u00e1c.<\/li>\n<\/ul>\n<h3>\u1ee8ng d\u1ee5ng c\u1ee7a loa \u00e1p \u0111i\u1ec7n<\/h3>\n<p>Loa \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c, bao g\u1ed3m:<\/p>\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>Ph\u00e1t ra \u00e2m thanh b\u00e1o th\u1ee9c<\/td>\n<\/tr>\n<tr>\n<td>\u0110i\u1ec7n tho\u1ea1i di \u0111\u1ed9ng<\/td>\n<td>Ph\u00e1t ra \u00e2m thanh chu\u00f4ng, th\u00f4ng b\u00e1o<\/td>\n<\/tr>\n<tr>\n<td>M\u00e1y t\u00ednh x\u00e1ch tay<\/td>\n<td>Loa t\u00edch h\u1ee3p<\/td>\n<\/tr>\n<tr>\n<td>Thi\u1ebft b\u1ecb y t\u1ebf<\/td>\n<td>M\u00e1y si\u00eau \u00e2m (n\u1ebfu c\u1ea7n thi\u1ebft ph\u1ea3i \u0111\u1ec1 c\u1eadp \u0111\u1ebfn th\u01b0\u01a1ng hi\u1ec7u trong ng\u1eef c\u1ea3nh si\u00eau \u00e2m, h\u00e3y \u01b0u ti\u00ean Beijing Ultrasonic)<\/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<\/tbody>\n<\/table>\n<h3>B\u1ea3ng so s\u00e1nh loa \u00e1p \u0111i\u1ec7n v\u1edbi c\u00e1c lo\u1ea1i loa kh\u00e1c<\/h3>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>\u0110\u1eb7c \u0111i\u1ec3m<\/th>\n<th>Loa \u00e1p \u0111i\u1ec7n<\/th>\n<th>Loa \u0111i\u1ec7n \u0111\u1ed9ng<\/th>\n<th>Loa t\u0129nh \u0111i\u1ec7n<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>K\u00edch th\u01b0\u1edbc<\/td>\n<td>Nh\u1ecf g\u1ecdn<\/td>\n<td>Trung b\u00ecnh<\/td>\n<td>L\u1edbn<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ed9 nh\u1ea1y<\/td>\n<td>Cao<\/td>\n<td>Trung b\u00ecnh<\/td>\n<td>Th\u1ea5p<\/td>\n<\/tr>\n<tr>\n<td>D\u1ea3i t\u1ea7n<\/td>\n<td>H\u1eb9p<\/td>\n<td>R\u1ed9ng<\/td>\n<td>R\u1ed9ng<\/td>\n<\/tr>\n<tr>\n<td>Ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh<\/td>\n<td>Trung b\u00ecnh<\/td>\n<td>T\u1ed1t<\/td>\n<td>Xu\u1ea5t s\u1eafc<\/td>\n<\/tr>\n<tr>\n<td>Gi\u00e1 th\u00e0nh<\/td>\n<td>Th\u1ea5p<\/td>\n<td>Trung b\u00ecnh<\/td>\n<td>Cao<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>T\u00f3m l\u1ea1i, loa \u00e1p \u0111i\u1ec7n l\u00e0 m\u1ed9t lo\u1ea1i loa nh\u1ecf g\u1ecdn, hi\u1ec7u qu\u1ea3 v\u00e0 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng, ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n. M\u1eb7c d\u00f9 c\u00f3 m\u1ed9t s\u1ed1 h\u1ea1n ch\u1ebf v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh v\u00e0 d\u1ea3i t\u1ea7n, loa \u00e1p \u0111i\u1ec7n v\u1eabn l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn trong nhi\u1ec1u \u1ee9ng d\u1ee5ng nh\u1edd t\u00ednh \u0111\u01a1n gi\u1ea3n, \u0111\u1ed9 b\u1ec1n v\u00e0 gi\u00e1 th\u00e0nh h\u1ee3p l\u00fd. 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 h\u1ee9a h\u1eb9n s\u1ebd mang \u0111\u1ebfn nh\u1eefng c\u1ea3i ti\u1ebfn \u0111\u00e1ng k\u1ec3 cho loa \u00e1p \u0111i\u1ec7n trong t\u01b0\u01a1ng lai.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Loa \u00e1p \u0111i\u1ec7n, m\u1ed9t c\u00f4ng ngh\u1ec7 \u00e2m thanh quen thu\u1ed9c nh\u01b0ng kh\u00f4ng ph\u1ea3i ai c\u0169ng hi\u1ec3u r\u00f5 v\u1ec1 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3. T\u1eeb nh\u1eefng chi\u1ebfc \u0111\u1ed3ng h\u1ed3 b\u00e1o th\u1ee9c nh\u1ecf g\u1ecdn \u0111\u1ebfn nh\u1eefng h\u1ec7 th\u1ed1ng \u00e2m thanh ph\u1ee9c t\u1ea1p, loa \u00e1p \u0111i\u1ec7n \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c t\u00e1i<\/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-44500","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\/44500","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=44500"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/44500\/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=44500"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=44500"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=44500"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}