B\u1eadt c\u00f4ng t\u1eafc ra\u0111i\u00f4 l\u00ean, xoay n\u00fam v\u1eb7n t\u00ecm s\u00f3ng l\u00e0 b\u1ea1n c\u00f3 th\u1ec3 tu\u1ef3 \u00fd ch\u1ecdn l\u1ef1a ti\u1ebft m\u1ee5c ph\u00e1t thanh m\u00e0 b\u1ea1n mu\u1ed1n thu nghe, ti\u1ec7n l\u1ee3i bi\u1ebft bao!<\/p>\n\n\n\n
M\u1ed9t c\u00e1i n\u00fam v\u1eb7n t\u00ecm s\u00f3ng nho nh\u1ecf v\u00ec sao c\u00f3 th\u1ec3 c\u00f3 t\u00e1c d\u1ee5ng to l\u1edbn nh\u01b0 v\u1eady nh\u1ec9?<\/p>\n\n\n\n
Ho\u00e1 ra l\u00e0, \u0111\u00e0i ph\u00e1t thanh c\u1ee7a c\u00e1c n\u01a1i \u0111\u1ec1u theo t\u1ea7n s\u1ed1 c\u1ee7a m\u00ecnh, c\u0103n c\u1ee9 v\u00e0o th\u1eddi gian v\u00e0 ti\u1ebft m\u1ee5c \u0111\u00e3 s\u1eafp x\u1ebfp tr\u01b0\u1edbc, ph\u00e1t s\u00f3ng v\u00f4 tuy\u1ebfn \u0111i\u1ec7n l\u00ean kh\u00f4ng trung. Ch\u00fang ta ng\u1ed3i trong ph\u00f2ng, kh\u00f4ng nh\u00ecn th\u1ea5y v\u00e0 kh\u00f4ng s\u1edd \u0111\u01b0\u1ee3c nh\u1eefng d\u00f2ng \u0111i\u1ec7n \u0111\u00f3, nh\u01b0ng ch\u1ec9 c\u1ea7n c\u00f3 \u0111\u01b0\u1ee3c m\u1ed9t c\u00e1i ra\u0111i\u00f4, \u0103ng ten c\u1ee7a ra\u0111i\u00f4 s\u1ebd l\u1eadp t\u1ee9c c\u1ea3m \u1ee9ng ra d\u00f2ng \u0111i\u1ec7n y\u1ebfu \u1edbt c\u1ee7a c\u00e1c lo\u1ea1i t\u1ea7n s\u1ed1 kh\u00e1c nhau, \u0111\u1ee3i ch\u00fang ta ch\u1ecdn l\u1ef1a khi thu nghe.<\/p>\n\n\n\n
Khi b\u1ea1n xoay n\u00fam t\u00ecm s\u00f3ng, c\u00e1i t\u1ee5 \u0111i\u1ec7n bi\u1ebfn \u0111\u1ed5i c\u00f9ng theo \u0111\u00f3 m\u00e0 xoay. T\u1ee5 \u0111i\u1ec7n n\u00e0y n\u1ed1i li\u1ec1n v\u1edbi cu\u1ed9n d\u00e2y dao \u0111\u1ed9ng c\u1ed9ng h\u01b0\u1edfng. Ch\u00fang h\u1ee3p th\u00e0nh m\u1ed9t c\u01a1 c\u1ea5u ch\u1ecdn l\u1ef1a. T\u1ee5 \u0111i\u1ec7n xoay \u0111\u1ebfn m\u1ed9t v\u1ecb tr\u00ed n\u00e0o \u0111\u00f3, c\u01a1 c\u1ea5u ch\u1ecdn l\u1ef1a ch\u1ec9 \u0111\u1ec3 cho d\u00f2ng \u0111i\u1ec7n y\u1ebfu \u1edbt c\u1ee7a t\u1ea7n s\u1ed1 m\u00e0 c\u00e1i kim di \u0111\u1ed9ng ch\u1ec9 ra \u0111\u01b0\u1ee3c ph\u00e9p l\u1ecdt v\u00e0o v\u00e0 t\u0103ng c\u01b0\u1eddng l\u00ean, c\u00f2n nh\u1eefng d\u00f2ng \u0111i\u1ec7n y\u1ebfu \u1edbt c\u1ee7a c\u00e1c t\u1ea7n s\u1ed1 kh\u00e1c kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p nh\u1eadn s\u1ef1 t\u0103ng c\u01b0\u1eddng. N\u1ebfu nh\u01b0 l\u00fac \u1ea5y c\u00f4ng t\u1eafc \u0111\u00e3 b\u1eadt l\u00ean, d\u00f2ng \u0111i\u1ec7n \u0111\u01b0\u1ee3c t\u0103ng c\u01b0\u1eddng th\u00f4ng qua s\u1ef1 kh\u1eed bi\u1ebfn \u0111i\u1ec7u (t\u00e1ch b\u1ecf s\u00f3ng mang), \u0111\u1ec3 cho t\u00edn hi\u1ec7u \u0111i\u1ec7n \u00e2m t\u1ea7n c\u1ee7a ti\u1ebft m\u1ee5c ph\u00e1t thanh v\u1eeba “c\u1edfi” ra \u0111i v\u00e0o b\u1ed9 khu\u1ebfch \u0111\u1ea1i c\u1ee7a ra\u0111i\u00f4 khu\u1ebfch \u0111\u1ea1i l\u00ean, r\u1ed3i chuy\u1ec3n \u0111\u1ed5i th\u00e0nh \u00e2m thanh trong loa \u0111i\u1ec7n v\u00e0 ph\u00e1t ra ngo\u00e0i.<\/p>\n\n\n\n
Tr\u00ean th\u1ef1c t\u1ebf, t\u00e1c d\u1ee5ng c\u1ee7a c\u01a1 c\u1ea5u l\u1ecdc l\u1ef1a do t\u1ee5 \u0111i\u1ec7n n\u1ed1i li\u1ec1n v\u1edbi cu\u1ed9n d\u00e2y t\u1ea1o th\u00e0nh c\u0169ng gi\u1ed1ng v\u1edbi t\u00e1c d\u1ee5ng c\u1ed9ng h\u01b0\u1edfng n\u00f3i \u0111\u1ebfn trong dao \u0111\u1ed9ng. Trong c\u01a1 c\u1ea5u l\u1ecdc l\u1ef1a n\u00e0y c\u00f3 th\u1ec3 sinh ra d\u00f2ng \u0111i\u1ec7n c\u1ee7a t\u1ea7n s\u1ed1 nh\u1ea5t \u0111\u1ecbnh. Khi t\u1ea7n s\u1ed1 m\u00e0 t\u1ee5 \u0111i\u1ec7n bi\u1ebfn \u0111\u1ed5i \u0111i\u1ec1u ti\u1ebft ra b\u1eb1ng v\u1edbi t\u1ea7n s\u1ed1 c\u1ee7a d\u00f2ng \u0111i\u1ec7n n\u00e0o \u0111\u00f3 trong \u0103ng ten th\u00ec x\u1ea3y ra c\u1ed9ng h\u01b0\u1edfng \u0111i\u1ec7n, qua \u0111\u00f3 d\u00f2ng \u0111i\u1ec7n c\u1ee7a t\u1ea7n s\u1ed1 n\u00e0y \u0111\u01b0\u1ee3c l\u1ecdc l\u1ef1a v\u00e0 t\u0103ng c\u01b0\u1eddng.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Ra\u0111i\u00f4; S\u00f3ng v\u00f4 tuy\u1ebfn \u0111i\u1ec7n; \u0102ngten; T\u1ee5 \u0111i\u1ec7n bi\u1ebfn \u0111\u1ed5i; C\u1ed9ng<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
B\u1eadt c\u00f4ng t\u1eafc ra\u0111i\u00f4 l\u00ean, xoay n\u00fam v\u1eb7n t\u00ecm s\u00f3ng l\u00e0 b\u1ea1n c\u00f3 th\u1ec3 tu\u1ef3 \u00fd ch\u1ecdn l\u1ef1a ti\u1ebft m\u1ee5c ph\u00e1t thanh m\u00e0 b\u1ea1n mu\u1ed1n thu nghe, ti\u1ec7n l\u1ee3i bi\u1ebft bao! M\u1ed9t c\u00e1i n\u00fam v\u1eb7n t\u00ecm s\u00f3ng nho nh\u1ecf v\u00ec sao c\u00f3 th\u1ec3 c\u00f3 t\u00e1c d\u1ee5ng to l\u1edbn nh\u01b0 v\u1eady nh\u1ec9? Ho\u00e1 ra l\u00e0, \u0111\u00e0i […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,7],"tags":[],"class_list":["post-5928","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/5928","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=5928"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/5928\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=5928"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=5928"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=5928"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}