{"id":21058,"date":"2025-07-08T02:20:54","date_gmt":"2025-07-07T19:20:54","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=21058"},"modified":"2025-07-08T10:04:53","modified_gmt":"2025-07-08T03:04:53","slug":"ly-thuyet-do-cao-cua-am-va-bai-tap-van-dung-vat-ly-7","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/ly-thuyet-do-cao-cua-am-va-bai-tap-van-dung-vat-ly-7\/","title":{"rendered":"L\u00fd thuy\u1ebft \u0111\u1ed9 cao c\u1ee7a \u00e2m v\u00e0 b\u00e0i t\u1eadp v\u1eadn d\u1ee5ng (v\u1eadt l\u00fd 7)"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ckconitsha.com\/vn\/ly-thuyet-do-cao-cua-am-va-bai-tap-van-dung-vat-ly-7\/#Chieu_cao_cua_am_thanh_la_gi\" >Chi\u1ec1u cao c\u1ee7a \u00e2m thanh l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/ly-thuyet-do-cao-cua-am-va-bai-tap-van-dung-vat-ly-7\/#Tan_so_am\" >T\u1ea7n s\u1ed1 \u00e2m<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/ly-thuyet-do-cao-cua-am-va-bai-tap-van-dung-vat-ly-7\/#Chieu_cao_cua_am_thanh_phu_thuoc_vao_tan_so\" >Chi\u1ec1u cao c\u1ee7a \u00e2m thanh ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/ly-thuyet-do-cao-cua-am-va-bai-tap-van-dung-vat-ly-7\/#Cong_thuc_tinh_toan_tan_so_dao_dong\" >C\u00f4ng th\u1ee9c t\u00ednh to\u00e1n t\u1ea7n s\u1ed1 dao \u0111\u1ed9ng<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/ly-thuyet-do-cao-cua-am-va-bai-tap-van-dung-vat-ly-7\/#Am_thanh_cao_trunge_am_thanh_thap_bass\" >\u00c2m thanh cao (trunge), \u00e2m thanh th\u1ea5p (bass)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/ly-thuyet-do-cao-cua-am-va-bai-tap-van-dung-vat-ly-7\/#Cac_yeu_to_phan_biet_cac_am_thanh_khac_nhau\" >C\u00e1c y\u1ebfu t\u1ed1 ph\u00e2n bi\u1ec7t c\u00e1c \u00e2m thanh kh\u00e1c nhau<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/ly-thuyet-do-cao-cua-am-va-bai-tap-van-dung-vat-ly-7\/#Cac_bai_tap_am_thanh_cao\" >C\u00e1c b\u00e0i t\u1eadp \u00e2m thanh cao<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p style=\"text-align: left\">\n<p dir=\"ltr\">Trong Ch\u01b0\u01a1ng tr\u00ecnh V\u1eadt l\u00fd 7, h\u1ecd s\u1ebd h\u1ecdc \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u v\u1ec1 \u00e2m thanh v\u00e0 nh\u1eefng \u0111i\u1ec1u th\u00fa v\u1ecb xung quanh ch\u00fang. Ng\u00e0y nay, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd gi\u1edbi thi\u1ec7u cho h\u1ecd ki\u1ebfn \u200b\u200bth\u1ee9c v\u1ec1 chi\u1ec1u cao c\u1ee7a \u00e2m thanh? C\u00f4ng th\u1ee9c l\u00e0 c\u0169ng nh\u01b0 c\u00e1c y\u1ebfu t\u1ed1 ti\u00eau c\u1ef1c kh\u00e1c nhau. T\u1ea5t c\u1ea3 s\u1ebd c\u00f3 trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n<p>                                    <img decoding=\"async\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/image\/600x480.png\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Chieu_cao_cua_am_thanh_la_gi\"><\/span>Chi\u1ec1u cao c\u1ee7a \u00e2m thanh l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/do-cao-cua-am-1.png\" alt=\"Chi\u1ec1u cao c\u1ee7a \u00e2m thanh kh\u00f4ng gi\u1ed1ng nhau. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"800\"><\/p>\n<p dir=\"ltr\">\u00c2m thanh xu\u1ea5t hi\u1ec7n xung quanh ch\u00fang ta, c\u00f3 th\u1ec3 l\u00e0 t\u1eeb ho\u1eb7c c\u00e1c c\u00f4ng c\u1ee5 \u00e2m nh\u1ea1c. Tuy nhi\u00ean, \u00e2m thanh s\u1ebd kh\u00e1c, b\u1edfi v\u00ec ch\u00fang \u0111\u01b0\u1ee3c quy\u1ebft \u0111\u1ecbnh t\u1eeb c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m v\u1eadt l\u00fd c\u1ee7a \u00e2m thanh, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 t\u1ea7n s\u1ed1.<\/p>\n<p dir=\"ltr\">Chi\u1ec1u cao c\u1ee7a \u00e2m thanh s\u1ebd ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 ho\u1eb7c s\u1ed1 l\u01b0\u1ee3ng dao \u0111\u1ed9ng trong m\u1ed7i gi\u00e2y c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng ph\u00e1t ra \u00e2m thanh \u0111\u00f3.<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5, khi k\u00e9o d\u00e0i d\u00e2y v\u00e0 nh\u1ed5 n\u00f3, t\u1ea7n s\u1ed1 c\u1ee7a d\u00e2y l\u00e0 l\u1edbn, \u00e2m thanh cao h\u01a1n.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Tan_so_am\"><\/span>T\u1ea7n s\u1ed1 \u00e2m<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">T\u1ea7n s\u1ed1 \u00e2m l\u00e0 t\u1ea7n s\u1ed1 m\u00e0 con ng\u01b0\u1eddi c\u00f3 th\u1ec3 nghe th\u1ea5y, trong ph\u1ea1m vi t\u1eeb 20Hz \u0111\u1ebfn 20kHz. T\u1ea7n s\u1ed1 \u00e2m thanh l\u00e0 s\u1ed1 l\u01b0\u1ee3ng quy\u1ebft \u0111\u1ecbnh nh\u1ea5t so v\u1edbi chi\u1ec1u cao<\/p>\n<p dir=\"ltr\">\u0110\u01a1n v\u1ecb ti\u00eau chu\u1ea9n l\u00e0 Hertz (vi\u1ebft t\u1eaft HZ). <\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Chieu_cao_cua_am_thanh_phu_thuoc_vao_tan_so\"><\/span>Chi\u1ec1u cao c\u1ee7a \u00e2m thanh ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/do-cao-cua-am-2.jpg\" alt=\"Chi\u1ec1u cao c\u1ee7a \u00e2m thanh s\u1ebd kh\u00e1c nhau d\u1ef1a tr\u00ean t\u1ea7n s\u1ed1. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"800\"><\/p>\n<p dir=\"ltr\">Nh\u01b0 \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u trong \u0111\u1ecbnh ngh\u0129a, chi\u1ec1u cao c\u1ee7a \u00e2m thanh s\u1ebd ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1. Dao \u0111\u1ed9ng c\u1ee7a v\u1eadt th\u1ec3 ph\u00e1t ra c\u00e1c \u00e2m thanh kh\u00e1c nhau v\u00e0 ch\u00fang s\u1ebd \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c \u0111\u1ed9 cao kh\u00e1c nhau. <\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Khi \u0111\u1ed1i t\u01b0\u1ee3ng dao \u0111\u1ed9ng nhanh ch\u00f3ng v\u00e0 c\u00f3 t\u1ea7n s\u1ed1 dao \u0111\u1ed9ng l\u1edbn (ngh\u0129a l\u00e0 trong m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi gian \u0111\u1ed1i t\u01b0\u1ee3ng th\u1ef1c hi\u1ec7n nhi\u1ec1u dao \u0111\u1ed9ng h\u01a1n), \u00e2m thanh s\u1ebd \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u00e2m thanh c\u00e0ng cao ho\u1eb7c \u00e2m thanh c\u00e0ng nhi\u1ec1u.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Khi \u0111\u1ed1i t\u01b0\u1ee3ng dao \u0111\u1ed9ng ch\u1eadm v\u00e0 t\u1ea7n s\u1ed1 dao \u0111\u1ed9ng kh\u00e1 nh\u1ecf (ngh\u0129a l\u00e0, trong m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi gian \u0111\u1ed1i t\u01b0\u1ee3ng th\u1ef1c hi\u1ec7n \u00edt dao \u0111\u1ed9ng h\u01a1n), \u00e2m thanh s\u1ebd \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u00e2m tr\u1ea7m th\u1ea5p h\u01a1n ho\u1eb7c \u00e2m thanh th\u1ea5p h\u01a1n.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">\u0110\u1ed1i t\u01b0\u1ee3ng t\u1ea1o ra m\u1ed9t dao \u0111\u1ed9ng c\u00f3 ngh\u0129a l\u00e0: khi \u0111\u1ed1i t\u01b0\u1ee3ng di chuy\u1ec3n kho\u1ea3ng c\u00e1ch t\u1eeb \u0111\u1ea7u dao \u0111\u1ed9ng cho \u0111\u1ebfn khi n\u00f3 l\u1eb7p l\u1ea1i c\u00f9ng m\u1ed9t v\u1ecb tr\u00ed.<\/p>\n<p dir=\"ltr\">T\u1ea7n s\u1ed1: l\u00e0 s\u1ed1 dao \u0111\u1ed9ng m\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong 1 gi\u00e2y.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_toan_tan_so_dao_dong\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh to\u00e1n t\u1ea7n s\u1ed1 dao \u0111\u1ed9ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table style=\"border-collapse: collapse;width: 100.019%\" border=\"1\">\n<tr>\n<td style=\"width: 98.9117%;background-color: #c2e0f4;text-align: center;border: 0.5px solid #4e4c50\">\n<p>f = n\/t<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<p dir=\"ltr\">F: T\u1ea7n s\u1ed1 dao \u0111\u1ed9ng (HZ)<\/p>\n<p dir=\"ltr\">N: S\u1ed1 l\u01b0\u1ee3ng dao \u0111\u1ed9ng<\/p>\n<p dir=\"ltr\">T: Th\u1eddi gian cho \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean n dao \u0111\u1ed9ng<\/p>\n<p dir=\"ltr\">\u0110\u01a1n v\u1ecb: \u0110\u01a1n v\u1ecb c\u1ee7a t\u1ea7n s\u1ed1 dao \u0111\u1ed9ng l\u00e0 H\u00e9c (Bi\u1ec3u t\u01b0\u1ee3ng: Hz)<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Am_thanh_cao_trunge_am_thanh_thap_bass\"><\/span>\u00c2m thanh cao (trunge), \u00e2m thanh th\u1ea5p (bass) <span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/do-cao-cua-am-3.jpg\" alt=\"C\u00e1 heo c\u00f3 th\u1ec3 nghe th\u1ea5y si\u00eau \u00e2m. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"800\"><\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u00c2m thanh cao (v\u1ec9a h\u00e8): Dao \u0111\u1ed9ng c\u00e0ng nhanh (t\u1ea7n s\u1ed1 dao \u0111\u1ed9ng c\u00e0ng l\u1edbn), \u00e2m thanh s\u1ebd c\u00e0ng cao (b\u1ea1n c\u00e0ng nhi\u1ec1u).<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u00c2m thanh th\u1ea5p (\u00e2m thanh bass): Khi \u0111\u1ed1i t\u01b0\u1ee3ng th\u1ef1c hi\u1ec7n dao \u0111\u1ed9ng ch\u1eadm h\u01a1n (t\u1ea7n s\u1ed1 dao \u0111\u1ed9ng c\u00e0ng nh\u1ecf), \u00e2m thanh s\u1ebd c\u00e0ng th\u1ea5p (\u00e2m tr\u1ea7m c\u00e0ng nhi\u1ec1u).<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">M\u1ed9t s\u1ed1 ghi ch\u00fa:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">V\u1edbi \u00e2m thanh c\u00f3 t\u1ea7n s\u1ed1 d\u01b0\u1edbi 20Hz \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u00e2m thanh th\u1ea5p h\u01a1n.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">V\u1edbi \u00e2m thanh c\u00f3 t\u1ea7n s\u1ed1 l\u1edbn h\u01a1n 20.000Hz \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 si\u00eau \u00e2m.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u1ea7n s\u1ed1 t\u1eeb 20Hz \u0111\u1ebfn 20.000Hz l\u00e0 t\u1ea7n s\u1ed1 th\u00f4ng th\u01b0\u1eddng m\u00e0 tai ng\u01b0\u1eddi c\u00f3 th\u1ec3 nghe th\u1ea5y.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t s\u1ed1 \u0111\u1ed9ng v\u1eadt c\u00f3 th\u1ec3 nghe th\u1ea5y \u00e2m thanh v\u00e0 si\u00eau \u00e2m th\u1ea5p h\u01a1n (d\u01a1i, ch\u00f3, c\u00e1 heo, &#8230;).<\/p>\n<\/li>\n<\/ul>\n<p>Xem th\u00eam: \u00c1nh s\u00e1ng l\u00e0 g\u00ec? H\u1ecdc ki\u1ebfn \u200b\u200bth\u1ee9c v\u1ec1 \u00e1nh s\u00e1ng t\u1eeb AZ<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_yeu_to_phan_biet_cac_am_thanh_khac_nhau\"><\/span>C\u00e1c y\u1ebfu t\u1ed1 ph\u00e2n bi\u1ec7t c\u00e1c \u00e2m thanh kh\u00e1c nhau<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/do-cao-cua-am-4.jpg\" alt=\"\u00c2m thanh c\u1ee7a \u00e2m thanh c\u00e0ng l\u1edbn khi c\u01b0\u1eddng \u0111\u1ed9 \u00e2m thanh l\u1edbn h\u01a1n. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"800\"><\/p>\n<p dir=\"ltr\">\u0110\u1ec3 c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t c\u00e1c \u00e2m thanh kh\u00e1c nhau, ch\u00fang ta c\u1ea7n d\u1ef1a v\u00e0o ba \u0111\u1eb7c \u0111i\u1ec3m sinh l\u00fd c\u1ee7a \u00e2m thanh, bao g\u1ed3m: chi\u1ec1u cao, \u0111\u1ed9 \u1ed3n v\u00e0 \u00e2m \u0111i\u1ec7u.<\/p>\n<p dir=\"ltr\">Chi\u1ec1u cao c\u1ee7a \u00e2m thanh<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u00e2y l\u00e0 m\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m sinh l\u00fd c\u1ee7a \u00e2m thanh, li\u00ean quan \u0111\u1ebfn t\u1ea7n s\u1ed1 c\u1ee7a \u00e2m thanh.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u1ea7n s\u1ed1 c\u00e0ng l\u1edbn, \u00e2m thanh c\u00e0ng cao. Ng\u01b0\u1ee3c l\u1ea1i, \u00e2m thanh s\u1ebd th\u1ea5p h\u01a1n khi t\u1ea7n s\u1ed1 nh\u1ecf h\u01a1n.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">\u0110\u1ed9 \u1ed3n c\u1ee7a \u00e2m thanh<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u1ed9 \u1ed3n c\u1ee7a \u00e2m thanh l\u00e0 kh\u00e1i ni\u1ec7m v\u1ec1 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m sinh l\u00fd c\u1ee7a \u00e2m thanh, li\u00ean quan \u0111\u1ebfn c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m v\u1eadt l\u00fd c\u1ee7a c\u01b0\u1eddng \u0111\u1ed9 \u00e2m thanh. Tuy nhi\u00ean, vi\u1ec7c \u0111o l\u01b0\u1eddng \u00e2m thanh c\u1ee7a \u00e2m thanh kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c \u0111o d\u1ef1a tr\u00ean m\u1ee9c c\u01b0\u1eddng \u0111\u1ed9 \u00e2m thanh.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u1ed9 \u1ed3n c\u1ee7a \u00e2m thanh s\u1ebd ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 \u00e2m, c\u01b0\u1eddng \u0111\u1ed9 \u00e2m thanh v\u00e0 m\u1ee9c c\u01b0\u1eddng \u0111\u1ed9 \u00e2m thanh.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u00c2m thanh c\u00e0ng l\u1edbn n\u1ebfu c\u01b0\u1eddng \u0111\u1ed9 \u00e2m thanh l\u1edbn h\u01a1n.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u00c2m thanh c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 \u00e2m thanh nh\u1ecf nh\u1ea5t m\u00e0 tai ch\u00fang ta c\u1ea3m th\u1ea5y, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ng\u01b0\u1ee1ng nghe.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u00c2m thanh c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 \u00e2m thanh l\u00ean t\u1edbi 10W\/m2, tai ch\u00fang ta nghe c\u00f3 v\u1ebb \u0111au nh\u00f3i cho t\u1ea5t c\u1ea3 c\u00e1c t\u1ea7n s\u1ed1 g\u1ecdi l\u00e0 ng\u01b0\u1ee1ng \u0111au.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">\u00c2m thanh<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u00c2m thanh c\u1ee7a \u00e2m thanh th\u01b0\u1eddng kh\u00e1c nhau v\u00e0 r\u1ea5t d\u1ec5 nghe, v\u00ed d\u1ee5, khi c\u00e1c lo\u1ea1i nh\u1ea1c c\u1ee5 kh\u00e1c nhau ph\u00e1t ra \u00e2m thanh c\u1ee7a c\u00f9ng m\u1ed9t chi\u1ec1u cao, tai ch\u00fang ta v\u1eabn c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t t\u1eebng lo\u1ea1i nh\u1ea1c c\u1ee5.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u00c2m thanh c\u00f3 c\u00f9ng chi\u1ec1u cao l\u00e0 do c\u00e1c lo\u1ea1i nh\u1ea1c c\u1ee5 kh\u00e1c nhau c\u00f3 c\u00f9ng chu k\u1ef3, nh\u01b0ng \u0111\u1ed3 th\u1ecb dao \u0111\u1ed9ng c\u1ee7a ch\u00fang ho\u00e0n to\u00e0n kh\u00e1c nhau.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c hi\u1ec3u l\u00e0 m\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m sinh l\u00fd c\u1ee7a \u00e2m thanh, \u0111\u1ec3 ch\u00fang ta c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t \u00e2m thanh v\u1edbi c\u00e1c ngu\u1ed3n kh\u00e1c nhau. \u0110\u1ed3 th\u1ecb dao \u0111\u1ed9ng \u00e2m thanh c\u00f3 li\u00ean quan ch\u1eb7t ch\u1ebd v\u1edbi m\u00e0u s\u1eafc. <\/p>\n<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_bai_tap_am_thanh_cao\"><\/span>C\u00e1c b\u00e0i t\u1eadp \u00e2m thanh cao<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">C\u00e2u 1: K\u1ebft lu\u1eadn n\u00e0o sau \u0111\u00e2y l\u00e0 sai?<\/p>\n<p dir=\"ltr\">A. Tai c\u1ee7a ng\u01b0\u1eddi nghe \u0111\u01b0\u1ee3c h\u1ea1 xu\u1ed1ng v\u00e0 si\u00eau \u00e2m.<\/p>\n<p dir=\"ltr\">B. \u00c2m thanh th\u1ea5p h\u01a1n l\u00e0 \u00e2m thanh c\u00f3 t\u1ea7n s\u1ed1 d\u01b0\u1edbi 20Hz.<\/p>\n<p dir=\"ltr\">C. Si\u00eau \u00e2m m\u00e1y ph\u00e1t \u0111i\u1ec7n l\u00e0 m\u1ed9t tr\u00ecnh t\u1ea1o \u00e2m thanh v\u1edbi t\u1ea7n s\u1ed1 l\u1edbn h\u01a1n 20.000Hz.<\/p>\n<p dir=\"ltr\">D. M\u1ed9t s\u1ed1 \u0111\u1ed9ng v\u1eadt c\u00f3 th\u1ec3 nghe th\u1ea5y \u00e2m thanh m\u00e0 m\u1ecdi ng\u01b0\u1eddi kh\u00f4ng th\u1ec3 nghe th\u1ea5y.<\/p>\n<p dir=\"ltr\">C\u00e2u 2: Khi g\u00f5 v\u00e0o m\u1eb7t tr\u1ed1ng, b\u1ec1 m\u1eb7t tr\u1ed1ng rung l\u00ean \u00e2m thanh. Nh\u01b0ng khi con l\u1eafc dao \u0111\u1ed9ng, kh\u00f4ng c\u00f3 \u00e2m thanh. Ai \u0111\u00f3 gi\u1ea3i th\u00edch nh\u01b0 sau, ch\u1ecdn gi\u1ea3i th\u00edch ch\u00ednh x\u00e1c?<\/p>\n<p dir=\"ltr\">A. Con l\u1eafc kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t ngu\u1ed3n \u00e2m.<\/p>\n<p dir=\"ltr\">B. Con l\u1eafc l\u00e0 ngu\u1ed3n \u00e2m thanh nh\u01b0ng t\u1ea7n s\u1ed1 nh\u1ecf (\u00e2m thanh th\u1ea5p h\u01a1n) n\u00ean tai kh\u00f4ng th\u1ec3 nghe th\u1ea5y.<\/p>\n<p dir=\"ltr\">C. V\u00ec d\u00e2y c\u1ee7a con l\u1eafc ng\u1eafn, con l\u1eafc kh\u00f4ng th\u1ec3 t\u1ea1o ra \u00e2m thanh.<\/p>\n<p dir=\"ltr\">D. Con l\u1eafc di chuy\u1ec3n \u0111\u1ec3 n\u00f3 kh\u00f4ng ph\u00e1t ra \u00e2m thanh.<\/p>\n<p dir=\"ltr\">C\u00e2u 3: Ch\u1ecdn c\u00e2u l\u1ec7nh ch\u00ednh x\u00e1c?<\/p>\n<p dir=\"ltr\">A. T\u1ea7n s\u1ed1 l\u00e0 s\u1ed1 l\u01b0\u1ee3ng dao \u0111\u1ed9ng \u0111\u1ed9ng v\u1eadt \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh.<\/p>\n<p dir=\"ltr\">B. \u0110\u01a1n v\u1ecb t\u1ea7n s\u1ed1 l\u00e0 th\u1ee9 hai (s).<\/p>\n<p dir=\"ltr\">C. T\u1ea7n s\u1ed1 l\u00e0 s\u1ed1 l\u01b0\u1ee3ng kh\u00f4ng c\u00f3 \u0111\u01a1n v\u1ecb.<\/p>\n<p dir=\"ltr\">D. T\u1ea7n s\u1ed1 l\u00e0 s\u1ed1 l\u01b0\u1ee3ng dao \u0111\u1ed9ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong 1 gi\u00e2y.<\/p>\n<p dir=\"ltr\">C\u00e2u 4: T\u1ea7n su\u1ea5t dao \u0111\u1ed9ng c\u00e0ng cao<\/p>\n<p dir=\"ltr\">A. \u00c2m thanh s\u00e2u h\u01a1n <\/p>\n<p dir=\"ltr\">B. \u00c2m thanh to h\u01a1n<\/p>\n<p dir=\"ltr\">C. \u00c2m thanh \u00e2m thanh ng\u00e0y c\u00e0ng nhi\u1ec1u <\/p>\n<p dir=\"ltr\">D. \u00c2m thanh th\u1eadm ch\u00ed c\u00f2n nhi\u1ec1u h\u01a1n<\/p>\n<p dir=\"ltr\">C\u00e2u 5: Khi \u0111i\u1ec1u ch\u1ec9nh chu\u1ed7i, t\u1ea7n s\u1ed1 s\u1ebd thay \u0111\u1ed5i. C\u00e0ng k\u00e9o d\u00e0i guitar, \u00e2m thanh c\u00e0ng ph\u00e1t ra:<\/p>\n<p dir=\"ltr\">A. L\u1edbn <\/p>\n<p dir=\"ltr\">B. <\/p>\n<p dir=\"ltr\">C. Th\u1ea5p <\/p>\n<p dir=\"ltr\">D. em b\u00e9<\/p>\n<p dir=\"ltr\">C\u00e2u 6: M\u1ed9t con l\u1eafc th\u1ef1c hi\u1ec7n 20 dao \u0111\u1ed9ng trong 10 gi\u00e2y. T\u1ea7n s\u1ed1 dao \u0111\u1ed9ng c\u1ee7a con l\u1eafc n\u00e0y l\u00e0:<\/p>\n<p dir=\"ltr\">A. 2Hz<\/p>\n<p dir=\"ltr\">B. 0,5Hz <\/p>\n<p dir=\"ltr\">C. 2s <\/p>\n<p dir=\"ltr\">D. 0,5s<\/p>\n<p dir=\"ltr\">C\u00e2u 7: X\u00e1c \u0111\u1ecbnh dao \u0111\u1ed9ng n\u00e0o c\u00f3 t\u1ea7n s\u1ed1 l\u1edbn nh\u1ea5t c\u1ee7a c\u00e1c dao \u0111\u1ed9ng sau \u0111\u00e2y?<\/p>\n<p dir=\"ltr\">A. \u0110\u1ed1i t\u01b0\u1ee3ng trong 5 gi\u00e2y c\u00f3 500 bi\u1ebfn \u0111\u1ed9ng v\u00e0 ph\u00e1t ra \u00e2m thanh.<\/p>\n<p dir=\"ltr\">B. \u0110\u1ed1i t\u01b0\u1ee3ng dao \u0111\u1ed9ng ph\u00e1t ra \u00e2m thanh 200Hz.<\/p>\n<p dir=\"ltr\">C. Trong 1 gi\u00e2y, \u0111\u1ed1i t\u01b0\u1ee3ng dao \u0111\u1ed9ng l\u00e0 70 rung.<\/p>\n<p dir=\"ltr\">D. Trong m\u1ed9t ph\u00fat, dao \u0111\u1ed9ng l\u00e0 1000 dao \u0111\u1ed9ng.<\/p>\n<p dir=\"ltr\">C\u00e2u 8: M\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng dao \u0111\u1ed9ng v\u1edbi t\u1ea7n s\u1ed1 50Hz, do \u0111\u00f3, s\u1ed1 l\u01b0\u1ee3ng dao \u0111\u1ed9ng c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng trong 5 gi\u00e2y s\u1ebd l\u00e0:<\/p>\n<p dir=\"ltr\">A. 10 <\/p>\n<p dir=\"ltr\">B. 55 <\/p>\n<p dir=\"ltr\">C. 250 <\/p>\n<p dir=\"ltr\">D. 45<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed8T<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">D<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">D<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed8T<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i quy\u1ebft c\u00e2u h\u1ecfi 6,7,8:<\/p>\n<p dir=\"ltr\">C\u00e2u 6: F = NT = 2010 = 2 (Hz)<\/p>\n<p dir=\"ltr\">C\u00e2u 7: <\/p>\n<p dir=\"ltr\">&#8211; Tr\u01b0\u1eddng h\u1ee3p A: F = N\/T = 500\/5 = 100 (Hz)<\/p>\n<p dir=\"ltr\">&#8211; Tr\u01b0\u1eddng h\u1ee3p B: F = 200 (Hz)<\/p>\n<p dir=\"ltr\">&#8211; Tr\u01b0\u1eddng h\u1ee3p C: F = 70 (Hz)<\/p>\n<p dir=\"ltr\">&#8211; Tr\u01b0\u1eddng h\u1ee3p D: F = N\/T = 1000\/60 17 (Hz)<\/p>\n<p dir=\"ltr\">Tr\u01b0\u1eddng h\u1ee3p B c\u00f3 t\u1ea7n s\u1ed1 l\u1edbn nh\u1ea5t.<\/p>\n<p dir=\"ltr\">C\u00e2u 8:<\/p>\n<p dir=\"ltr\">Trong 5 gi\u00e2y, s\u1ed1 l\u01b0\u1ee3ng dao \u0111\u1ed9ng l\u00e0:<\/p>\n<p dir=\"ltr\">f = n\/t \u21d2 n = ft = 50,5 = 250 (dao \u0111\u1ed9ng)<\/p>\n<p dir=\"ltr\">Hy v\u1ecdng, th\u00f4ng qua b\u00e0i vi\u1ebft n\u00e0y, h\u1ecd s\u1ebd hi\u1ec3u l\u00fd thuy\u1ebft c\u0169ng nh\u01b0 c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn chi\u1ec1u cao c\u1ee7a \u00e2m thanh v\u00e0 \u1ee9ng d\u1ee5ng l\u00e0 nhi\u1ec1u cu\u1ed9c s\u1ed1ng b\u00ean ngo\u00e0i. C\u1ea3m \u01a1n b\u1ea1n \u0111\u00e3 \u0111\u1ecdc b\u00e0i vi\u1ebft.<\/p>\n<\/p>\n<p>Ngu\u1ed3n: <a href=\"http:\/\/www.ckconitsha.com\/vn\/\">http:\/\/www.ckconitsha.com\/vn\/<\/a> T\u00e1c gi\u1ea3: <a href=\"https:\/\/www.ckconitsha.com\/vn\/author\/nguyenlandung\">Nguy\u1ec5n L\u00e2n d\u0169ng<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trong Ch\u01b0\u01a1ng tr\u00ecnh V\u1eadt l\u00fd 7, h\u1ecd s\u1ebd h\u1ecdc \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u v\u1ec1 \u00e2m thanh v\u00e0 nh\u1eefng \u0111i\u1ec1u th\u00fa v\u1ecb xung quanh ch\u00fang. Ng\u00e0y nay, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd gi\u1edbi thi\u1ec7u cho h\u1ecd ki\u1ebfn \u200b\u200bth\u1ee9c v\u1ec1 chi\u1ec1u cao c\u1ee7a \u00e2m thanh? C\u00f4ng th\u1ee9c l\u00e0 c\u0169ng nh\u01b0 c\u00e1c y\u1ebfu t\u1ed1 ti\u00eau c\u1ef1c&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[],"class_list":["post-21058","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/21058","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/comments?post=21058"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/21058\/revisions"}],"predecessor-version":[{"id":25055,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/21058\/revisions\/25055"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=21058"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=21058"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=21058"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}