{"id":44340,"date":"2023-04-25T14:59:42","date_gmt":"2023-04-25T19:59:42","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/what-is-an-audio-transducer\/"},"modified":"2025-01-21T07:28:35","modified_gmt":"2025-01-21T12:28:35","slug":"what-is-an-audio-transducer","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/what-is-an-audio-transducer\/","title":{"rendered":"Gi\u1ea3i M\u00e3 B\u1ed9 Chuy\u1ec3n \u0110\u1ed5i \u00c2m Thanh: Audio Transducer"},"content":{"rendered":"<p>\u00c2m thanh, m\u1ed9t ph\u1ea7n kh\u00f4ng th\u1ec3 thi\u1ebfu c\u1ee7a cu\u1ed9c s\u1ed1ng, \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi s\u1ef1 rung \u0111\u1ed9ng v\u00e0 lan truy\u1ec1n d\u01b0\u1edbi d\u1ea1ng s\u00f3ng.  \u0110\u1ec3 ch\u00fang ta c\u00f3 th\u1ec3 nghe \u0111\u01b0\u1ee3c \u00e2m thanh t\u1eeb thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed, c\u1ea7n c\u00f3 m\u1ed9t thi\u1ebft b\u1ecb \u0111\u1eb7c bi\u1ec7t chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u \u0111i\u1ec7n th\u00e0nh s\u00f3ng \u00e2m v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. Thi\u1ebft b\u1ecb n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e2m thanh, hay c\u00f2n g\u1ecdi l\u00e0 transducer \u00e2m thanh. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o t\u00ecm hi\u1ec3u v\u1ec1 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e2m thanh, nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng, c\u00e1c lo\u1ea1i v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang.<\/p>\n<h3>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e2m thanh<\/h3>\n<p>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e2m thanh ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean c\u00e1c nguy\u00ean l\u00fd v\u1eadt l\u00fd kh\u00e1c nhau \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i gi\u1eefa n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n v\u00e0 n\u0103ng l\u01b0\u1ee3ng \u00e2m thanh. C\u00f3 hai lo\u1ea1i chuy\u1ec3n \u0111\u1ed5i ch\u00ednh: chuy\u1ec3n \u0111\u1ed5i t\u1eeb t\u00edn hi\u1ec7u \u0111i\u1ec7n sang s\u00f3ng \u00e2m (v\u00ed d\u1ee5: loa) v\u00e0 chuy\u1ec3n \u0111\u1ed5i t\u1eeb s\u00f3ng \u00e2m sang t\u00edn hi\u1ec7u \u0111i\u1ec7n (v\u00ed d\u1ee5: microphone).  Qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i n\u00e0y d\u1ef1a tr\u00ean s\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa tr\u01b0\u1eddng \u0111i\u1ec7n t\u1eeb v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n c\u01a1 h\u1ecdc c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i.<\/p>\n<h3>C\u00e1c lo\u1ea1i b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e2m thanh<\/h3>\n<p>C\u00f3 nhi\u1ec1u lo\u1ea1i b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e2m thanh kh\u00e1c nhau, m\u1ed7i lo\u1ea1i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3. M\u1ed9t s\u1ed1 lo\u1ea1i ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Loa \u0111\u1ed9ng \u0111i\u1ec7n:<\/strong> S\u1eed d\u1ee5ng nam ch\u00e2m v\u0129nh c\u1eedu v\u00e0 cu\u1ed9n d\u00e2y d\u1eabn \u0111\u1ec3 t\u1ea1o ra chuy\u1ec3n \u0111\u1ed9ng, t\u1eeb \u0111\u00f3 t\u1ea1o ra s\u00f3ng \u00e2m.  \u0110\u00e2y l\u00e0 lo\u1ea1i loa ph\u1ed5 bi\u1ebfn nh\u1ea5t trong c\u00e1c thi\u1ebft b\u1ecb \u00e2m thanh gia \u0111\u00ecnh.<\/li>\n<li><strong>Loa t\u0129nh \u0111i\u1ec7n:<\/strong> S\u1eed d\u1ee5ng m\u00e0ng ch\u1eafn m\u1ecfng \u0111\u01b0\u1ee3c \u0111\u1eb7t gi\u1eefa hai b\u1ea3n c\u1ef1c t\u00edch \u0111i\u1ec7n. S\u1ef1 thay \u0111\u1ed5i \u0111i\u1ec7n \u00e1p gi\u1eefa c\u00e1c b\u1ea3n c\u1ef1c l\u00e0m m\u00e0ng ch\u1eafn rung \u0111\u1ed9ng v\u00e0 t\u1ea1o ra \u00e2m thanh. Loa t\u0129nh \u0111i\u1ec7n th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c h\u1ec7 th\u1ed1ng \u00e2m thanh cao c\u1ea5p.<\/li>\n<li><strong>Loa piezo:<\/strong> S\u1eed d\u1ee5ng hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, t\u1ee9c l\u00e0 s\u1ef1 bi\u1ebfn \u0111\u1ed5i gi\u1eefa \u00e1p l\u1ef1c c\u01a1 h\u1ecdc v\u00e0 \u0111i\u1ec7n \u00e1p, \u0111\u1ec3 t\u1ea1o ra \u00e2m thanh. Loa piezo th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea7n s\u1ed1 cao.<\/li>\n<li><strong>Microphone \u0111i\u1ec7n \u0111\u1ed9ng:<\/strong> Ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd c\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb. S\u00f3ng \u00e2m l\u00e0m rung \u0111\u1ed9ng m\u00e0ng ch\u1eafn, t\u1eeb \u0111\u00f3 l\u00e0m thay \u0111\u1ed5i t\u1eeb th\u00f4ng qua cu\u1ed9n d\u00e2y v\u00e0 t\u1ea1o ra t\u00edn hi\u1ec7u \u0111i\u1ec7n.<\/li>\n<li><strong>Microphone t\u1ee5 \u0111i\u1ec7n:<\/strong> S\u1eed d\u1ee5ng m\u00e0ng ch\u1eafn m\u1ecfng nh\u01b0 m\u1ed9t b\u1ea3n t\u1ee5 \u0111i\u1ec7n. S\u00f3ng \u00e2m l\u00e0m thay \u0111\u1ed5i kho\u1ea3ng c\u00e1ch gi\u1eefa m\u00e0ng ch\u1eafn v\u00e0 b\u1ea3n c\u1ef1c c\u1ed1 \u0111\u1ecbnh, t\u1eeb \u0111\u00f3 thay \u0111\u1ed5i \u0111i\u1ec7n dung v\u00e0 t\u1ea1o ra t\u00edn hi\u1ec7u \u0111i\u1ec7n.<\/li>\n<\/ul>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Lo\u1ea1i b\u1ed9 chuy\u1ec3n \u0111\u1ed5i<\/th>\n<th>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng<\/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>Loa \u0111\u1ed9ng \u0111i\u1ec7n<\/td>\n<td>Nam ch\u00e2m v\u00e0 cu\u1ed9n d\u00e2y<\/td>\n<td>Gi\u00e1 th\u00e0nh r\u1ebb, hi\u1ec7u su\u1ea5t cao<\/td>\n<td>\u0110\u1ed9 m\u00e9o ti\u1ebfng cao h\u01a1n so v\u1edbi loa t\u0129nh \u0111i\u1ec7n<\/td>\n<\/tr>\n<tr>\n<td>Loa t\u0129nh \u0111i\u1ec7n<\/td>\n<td>M\u00e0ng ch\u1eafn v\u00e0 b\u1ea3n c\u1ef1c t\u00edch \u0111i\u1ec7n<\/td>\n<td>\u00c2m thanh trong tr\u1ebbo, \u0111\u1ed9 m\u00e9o ti\u1ebfng th\u1ea5p<\/td>\n<td>Gi\u00e1 th\u00e0nh cao, k\u00edch th\u01b0\u1edbc l\u1edbn<\/td>\n<\/tr>\n<tr>\n<td>Loa piezo<\/td>\n<td>Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n<\/td>\n<td>K\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn, t\u1ea7n s\u1ed1 cao<\/td>\n<td>D\u1ea3i t\u1ea7n s\u1ed1 h\u1eb9p<\/td>\n<\/tr>\n<tr>\n<td>Microphone \u0111i\u1ec7n \u0111\u1ed9ng<\/td>\n<td>C\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb<\/td>\n<td>\u0110\u1ed9 b\u1ec1n cao, gi\u00e1 th\u00e0nh r\u1ebb<\/td>\n<td>\u0110\u1ed9 nh\u1ea1y k\u00e9m h\u01a1n microphone t\u1ee5 \u0111i\u1ec7n<\/td>\n<\/tr>\n<tr>\n<td>Microphone t\u1ee5 \u0111i\u1ec7n<\/td>\n<td>Bi\u1ebfn \u0111\u1ed5i \u0111i\u1ec7n dung<\/td>\n<td>\u0110\u1ed9 nh\u1ea1y cao, \u00e2m thanh trung th\u1ef1c<\/td>\n<td>Gi\u00e1 th\u00e0nh cao, c\u1ea7n ngu\u1ed3n phantom<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u1ee8ng d\u1ee5ng c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e2m thanh<\/h3>\n<p>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e2m thanh c\u00f3 \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c, bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>\u00c2m thanh gia \u0111\u00ecnh:<\/strong> Loa v\u00e0 microphone trong h\u1ec7 th\u1ed1ng \u00e2m thanh, tivi, \u0111i\u1ec7n tho\u1ea1i.<\/li>\n<li><strong>\u00c2m thanh chuy\u00ean nghi\u1ec7p:<\/strong> Loa v\u00e0 microphone trong ph\u00f2ng thu, s\u00e2n kh\u1ea5u, h\u1ec7 th\u1ed1ng \u00e2m thanh c\u00f4ng c\u1ed9ng.<\/li>\n<li><strong>Y t\u1ebf:<\/strong>  Si\u00eau \u00e2m trong ch\u1ea9n \u0111o\u00e1n h\u00ecnh \u1ea3nh, m\u00e1y tr\u1ee3 th\u00ednh. N\u1ebfu x\u00e9t \u0111\u1ebfn si\u00eau \u00e2m, m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 t\u1eeb c\u00e1c h\u00e3ng nh\u01b0 Beijing Ultrasonic.<\/li>\n<li><strong>C\u00f4ng nghi\u1ec7p:<\/strong> C\u1ea3m bi\u1ebfn \u00e2m thanh trong c\u00e1c h\u1ec7 th\u1ed1ng ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y, h\u1ec7 th\u1ed1ng \u0111o l\u01b0\u1eddng v\u00e0 \u0111i\u1ec1u khi\u1ec3n.<\/li>\n<li><strong>Vi\u1ec5n th\u00f4ng:<\/strong>  Tai nghe v\u00e0 microphone trong \u0111i\u1ec7n tho\u1ea1i di \u0111\u1ed9ng, h\u1ec7 th\u1ed1ng h\u1ed9i ngh\u1ecb truy\u1ec1n h\u00ecnh.<\/li>\n<\/ul>\n<p>T\u00f3m l\u1ea1i, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e2m thanh l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n thi\u1ebft y\u1ebfu trong nhi\u1ec1u thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed hi\u1ec7n \u0111\u1ea1i. S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng ngh\u1ec7 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e2m thanh \u0111\u00e3 v\u00e0 \u0111ang \u0111\u00f3ng g\u00f3p quan tr\u1ecdng v\u00e0o vi\u1ec7c n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh v\u00e0 mang l\u1ea1i tr\u1ea3i nghi\u1ec7m t\u1ed1t h\u01a1n cho ng\u01b0\u1eddi d\u00f9ng.  Vi\u1ec7c hi\u1ec3u r\u00f5 v\u1ec1 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u00e1c lo\u1ea1i b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e2m thanh s\u1ebd gi\u00fap ch\u00fang ta l\u1ef1a ch\u1ecdn v\u00e0 s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00c2m thanh, m\u1ed9t ph\u1ea7n kh\u00f4ng th\u1ec3 thi\u1ebfu c\u1ee7a cu\u1ed9c s\u1ed1ng, \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi s\u1ef1 rung \u0111\u1ed9ng v\u00e0 lan truy\u1ec1n d\u01b0\u1edbi d\u1ea1ng s\u00f3ng. \u0110\u1ec3 ch\u00fang ta c\u00f3 th\u1ec3 nghe \u0111\u01b0\u1ee3c \u00e2m thanh t\u1eeb thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed, c\u1ea7n c\u00f3 m\u1ed9t thi\u1ebft b\u1ecb \u0111\u1eb7c bi\u1ec7t chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u \u0111i\u1ec7n th\u00e0nh s\u00f3ng \u00e2m v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/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-44340","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\/44340","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=44340"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/44340\/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=44340"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=44340"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=44340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}