{"id":3792,"date":"2020-04-15T03:02:32","date_gmt":"2020-04-14T20:02:32","guid":{"rendered":"https:\/\/bacdau.vn\/?post_type=kb&p=3792"},"modified":"2020-04-15T03:03:15","modified_gmt":"2020-04-14T20:03:15","slug":"am-la-gi-cung-nhu-la-cac-thong-tin-chuyen-sau-ve-am","status":"publish","type":"kb","link":"https:\/\/bacdau.vn\/kb\/am-la-gi-cung-nhu-la-cac-thong-tin-chuyen-sau-ve-am\/","title":{"rendered":"\u00c2m l\u00e0 g\u00ec c\u0169ng nh\u01b0 l\u00e0 c\u00e1c th\u00f4ng tin chuy\u00ean s\u00e2u v\u1ec1 \u00c2m"},"content":{"rendered":"

\u00c2m l\u00e0 g\u00ec c\u0169ng nh\u01b0 l\u00e0 c\u00e1c th\u00f4ng tin chuy\u00ean s\u00e2u v\u1ec1 \u00c2m<\/strong><\/h2>\n

\u00c2m l\u00e0 m\u1ed9t d\u1ea1ng \u00e2m thanh, lu\u00f4n lu\u00f4n xu\u1ea5t hi\u1ec7n xung quanh ta, \u00e2m c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t lo\u1ea1i \u00e2m thanh c\u1ee7a nh\u1ea1c c\u0169, c\u0169ng c\u00f3 th\u1ec3 l\u00e0 c\u00e1c t\u1eadp \u00e2m t\u1eeb c\u00e1c bu\u1ed5i ch\u1ee3 … V\u1eady \u00e2m l\u00e0 g\u00ec c\u0169ng nh\u01b0 l\u00e0 c\u00e1c th\u00f4ng tin chuy\u00ean s\u00e2u v\u1ec1 \u00e2m ra sao? M\u1eddi c\u00e1c b\u1ea1n c\u00f9ng BacDau.Vn ch\u00fang t\u00f4i \u0111i gi\u1ea3i \u0111\u00e1p nh\u1eefng th\u1eafc m\u1eafc n\u00e0y nh\u00e9!.<\/p>\n

\"\"<\/p>\n

\u00c2m l\u00e0 g\u00ec?<\/strong><\/h3>\n

\u00c2m l\u00e0 m\u1ed9t d\u1ea1ng l\u00e0n s\u1ed1ng trong c\u00e1c m\u00f4i tr\u01b0\u1eddng r\u1eafn, l\u1ecfng v\u00e0 kh\u00ed, hay g\u1ecdi c\u00e1ch kh\u00e1c th\u00ec \u00e2m l\u00e0 nh\u1eefng \u00e2m xung quanh n\u01a1i ch\u00fang ta t\u1ed3n t\u1ea1i d\u01b0\u1edbi d\u1ea1ng s\u00f3ng c\u01a1. Ch\u00fang \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh n\u00ean nh\u1edd s\u1ef1 dao \u0111\u1ed9ng gi\u1eefa c\u00e1c ph\u00e2n t\u1eed l\u1ea1i v\u1edbi nhau trong m\u00f4i tr\u01b0\u1eddng truy\u1ec1n s\u00f3ng v\u00e0 lan truy\u1ec1n qua c\u00e1c m\u00f4i tr\u01b0\u1eddng kh\u00e1c. M\u1ed9t v\u00e0i \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a \u00e2m nh\u01b0:<\/p>\n

+ Khi \u00e2m \u0111\u01b0\u1ee3c truy\u1ec1n qua m\u00f4i tr\u01b0\u1eddng ch\u1ea5t l\u1ecfng v\u00e0 kh\u00ed th\u00ec \u00e2m s\u1ebd c\u00f3 d\u1ea1ng s\u00f3ng d\u1ecdc, c\u00f3 v\u1eadn t\u1ed1c truy\u1ec1n \u00e2m v\u00f4 c\u00f9ng l\u1edbn.
\n+ C\u00f2n khi \u00e2m \u0111\u01b0\u1ee3c truy\u1ec1n v\u00e0o m\u00f4i tr\u01b0\u1eddng r\u1eafn th\u00ec \u00e2m s\u1ebd c\u00f3 d\u1ea1ng s\u00f3ng ngang, v\u00e0 khi \u0111\u00f3 v\u1eadn t\u1ed1c truy\u1ec1n \u00e2m c\u0169ng v\u00f4 c\u00f9ng nh\u1ecf.
\n+ C\u00f2n khi \u00e2m \u0111\u01b0\u1ee3c truy\u1ec1n v\u00e0 ch\u00e2n kh\u00f4ng th\u00ec \u00e2m kh\u00f4ng th\u1ec3 di truy\u1ec3n n\u00ean kh\u00f4ng th\u1ec3 truy\u1ec1n \u0111i \u0111\u01b0\u1ee3c.<\/p>\n

\"\"<\/p>\n

Ph\u00e2n lo\u1ea1i \u00e2m<\/h3>\n

Hi\u1ec7n nay, c\u00f3 2 lo\u1ea1i \u00e2m ph\u1ed5 bi\u1ebfn nh\u01b0 \u00e2m b\u1ed3i v\u00e0 t\u1ea1p \u00e2m.<\/em><\/p>\n

+ \u00c2m b\u1ed3i<\/strong> l\u00e0 m\u1ed9t thu\u1eadt ng\u1eef \u0111\u01b0\u1ee3c xu\u1ea5t hi\u1ec7n trong \u00e2m nh\u1ea1c, th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi v\u1edbi nhi\u1ec1u t\u00ean g\u1ecdi kh\u00e1c nhau nh\u01b0 h\u1ecda \u00e2m, b\u1ed3i \u00e2m hay h\u00e0i h\u00e2m. \u00c2m b\u1ed3i l\u00e0 nh\u1eefng \u00e2m \u0111\u01b0\u1ee3c n\u00e2ng t\u1ea7n s\u1ed1 Hz l\u00ean cao h\u01a1n ho\u1eb7c th\u1ea5p h\u01a1n so v\u1edbi \u00e2m c\u01a1 b\u1ea3n.
\n+ T\u1ea1p \u00e2m<\/strong> l\u00e0 nh\u1eefng d\u00f2ng \u00e2m thanh c\u00f3 t\u1ea7n s\u1ed1 kh\u00f4ng th\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c, v\u00e0 ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n b\u1ea5t th\u01b0\u1eddng nh\u01b0 ti\u1ebfng truy\u1ec7n, c\u00f2i \u00f4 t\u00f4 xe m\u00e1y hay nh\u1eefng ti\u1ebfng \u1edf m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c h\u1eb1ng ng\u00e0y.<\/p>\n

\"\"<\/p>\n

C\u00e1c \u0111\u1eb7c tr\u01b0ng v\u1eadt l\u00fd c\u1ee7a \u00e2m<\/strong><\/h3>\n

+ T\u1ea7n s\u1ed1 \u00e2m<\/strong> l\u00e0 nh\u1eefng rung \u0111\u1ed9ng c\u1ee7a \u00e2m thanh v\u00e0 mang t\u00ednh ch\u1ea5t tu\u1ea7n honaf, khi \u0111\u00f3 con ng\u01b0\u1eddi ch\u1ec9 c\u00f3 th\u1ec3 nghe \u0111\u01b0\u1ee3c \u00e2m thanh \u1edf n\u1eb1m trong kho\u1ea3ng t\u1ea7n s\u1ed1 \u0111\u01b0\u1ee3c giao \u0111\u1ed9ng t\u1eeb 20 \u0111\u1ebfb 20.000Hz, c\u00f2n n\u1ebfu nh\u01b0 n\u1eb1m ngo\u00e0i ph\u1ea1m vi c\u1ee7a t\u1ea7n s\u1ed1 \u00e2m n\u00e0y th\u00ec con ng\u01b0\u1eddi kh\u00f4ng th\u1ec3 ti\u1ebfp nh\u1eadn \u0111\u01b0\u1ee3c \u00e2m thanh, c\u00f2n \u0111\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi b\u1ecb khi\u1ebfm th\u1ecb th\u00ec t\u1ea7n s\u1ed1 \u00e2m thanh c\u1ee7a h\u1ecd l\u00e0 0Hz. Hi\u1ec7n nay, t\u1ea7n s\u1ed1 \u00e2m \u0111\u01b0\u1ee3c chau l\u00e0m 3 d\u1ea3i t\u1ea7n s\u1ed1 \u00e2m thanh l\u00e0 bass, midrange v\u00e0 treble.<\/p>\n

+ Ho\u1ea1 \u00e2m b\u1eadc n<\/strong> l\u00e0 nh\u1eefng th\u00e0nh ng\u1eef, \u0111\u1ecbnh ngh\u0129a m\u00e0 con ng\u01b0\u1eddi hay nh\u1eafc \u0111\u1ebfn, \u0111\u00e2y l\u00e0 nh\u1eefng \u00e2m ngo\u00e0i \u00e2m c\u01a1 v\u00e0 \u0111\u01b0\u1ee3c s\u1ea3n sinh ra t\u1eeb b\u1ed9i \u00e2m.<\/p>\n

+ C\u01b0\u1eddng \u0111\u1ed9 \u00e2m<\/strong>: \u0111\u00e2y l\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh \u0111\u1ebfn vi\u1ec7c b\u1ea1n c\u00f3 nghe r\u00f5 \u00e2m thanh hay kh\u00f4ng, nghe to v\u00e0 r\u00f5 \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 nh\u01b0 th\u1ebf n\u00e0o. \u0110\u1ed1i v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 \u00e2m th\u00ec s\u1ed1 n\u0103ng l\u01b0\u1ee3ng m\u00e0 s\u1ed1ng \u00e2m ph\u1ea3i truy\u1ec1n \u0111i trong m\u1ed9t kho\u1ea3ng th\u1eddi gian v\u00e0 di\u1ec7n t\u00edch c\u1ed1 \u0111\u1ecbnh \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ph\u01b0\u01a1ng truy\u1ec1n \u00e2m, c\u00f3 \u0111\u01a1n v\u1ecb \u0111o l\u00e0 dB.<\/p>\n

+ V\u1eadn t\u1ed1c truy\u1ec1n \u00e2m<\/strong> l\u00e0 t\u1ed1c \u0111\u1ed9 truy\u1ec1n t\u1ea3i \u00e2m thanh trong m\u1ed9t m\u00f4i tr\u01b0\u1eddng truy\u1ec1n \u00e2m nh\u1ea5t \u0111\u1ecbnh, ngo\u1ea1i tr\u1eeb c\u00e1c m\u00f4i tr\u01b0\u1eddng truy\u1ec1n \u00e2m th\u00ec v\u1eadn t\u1ed1c truy\u1ec1n \u00e2m s\u1ebd b\u1ecb t\u00e1c \u0111\u1ed9ng b\u1edfi m\u1ed9t v\u00e0i y\u1ebfu t\u1ed1 nh\u01b0 nhi\u1ec7t, \u00e1nh s\u00e1ng, hay l\u1ef1c c\u1ea3n … V\u1eadn t\u1ed1c truy\u1ec1n \u00e2m trong kh\u00f4ng kh\u00ed l\u00e0 340m\/s, \u0111\u00e2y l\u00e0 con s\u1ed1 l\u1edbn nh\u1ea5t, sau \u0111\u00f3 \u0111\u1ebfn v\u1eadn t\u1ed1c truy\u1ec1n trong ch\u1ea5t l\u1ecfng v\u00e0 th\u1ea5p nh\u1ea5t trong ch\u1ea5t r\u1eafn, c\u00f2n n\u1ebfu v\u1edbi ch\u1ea5t kh\u00ed th\u00ec v\u1eadn t\u1ed1c truy\u1ec1n \u00e2m l\u00e0 0.<\/p>\n

Nh\u01b0 v\u1eady, ch\u00fang ta \u0111\u00e3 c\u00f9ng nhau \u0111i gi\u1ea3i th\u00edch nh\u1eefng v\u1ea5n \u0111\u1ec1 th\u1eafc m\u1eafc v\u1ec1 \u00e2m l\u00e0 g\u00ec, ph\u00e2n lo\u1ea1i \u00e2m c\u0169ng nh\u01b0 l\u00e0 c\u00e1c t\u00ednh ch\u1ea5t \u0111\u1eb7c tr\u01b0ng v\u1eadt l\u00fd c\u1ee7a \u00e2m \u1edf tr\u00ean. Ho v\u1ecdng s\u1ebd gi\u00fap \u0111\u01b0\u1ee3c b\u1ea1n \u0111\u1ecdc b\u1ed5 sung th\u00eam \u0111\u01b0\u1ee3c m\u1ed9t \u00edt ki\u1ebfn th\u1ee9c n\u00e0o \u0111\u00f3. Hy v\u1ecdng c\u00e1c b\u1ea1n \u0111\u00e3 c\u00f3 nh\u1eefng ph\u00fat gi\u00e2y th\u00fa v\u1ecb v\u00e0 c\u00f3 th\u00eam nhi\u1ec1u nh\u1eefng ki\u1ebfn th\u1ee9c b\u1ed5 \u00edch!<\/p>\n","protected":false},"excerpt":{"rendered":"

\u00c2m l\u00e0 m\u1ed9t d\u1ea1ng \u00e2m thanh, lu\u00f4n lu\u00f4n xu\u1ea5t hi\u1ec7n xung quanh ta, \u00e2m c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t lo\u1ea1i \u00e2m thanh c\u1ee7a nh\u1ea1c c\u0169, c\u0169ng c\u00f3 th\u1ec3 l\u00e0 c\u00e1c t\u1eadp \u00e2m t\u1eeb c\u00e1c bu\u1ed5i ch\u1ee3 …<\/p>\n","protected":false},"author":1,"featured_media":3793,"comment_status":"open","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}}},"kbtopic":[641],"kbtag":[],"_links":{"self":[{"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/kb\/3792"}],"collection":[{"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/kb"}],"about":[{"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/types\/kb"}],"author":[{"embeddable":true,"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/comments?post=3792"}],"version-history":[{"count":0,"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/kb\/3792\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/media\/3793"}],"wp:attachment":[{"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/media?parent=3792"}],"wp:term":[{"taxonomy":"kbtopic","embeddable":true,"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/kbtopic?post=3792"},{"taxonomy":"kbtag","embeddable":true,"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/kbtag?post=3792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}