{"id":27731,"date":"2025-10-06T08:54:42","date_gmt":"2025-10-06T01:54:42","guid":{"rendered":"https:\/\/i-clc.edu.vn\/?p=27731"},"modified":"2025-10-06T08:54:42","modified_gmt":"2025-10-06T01:54:42","slug":"khoa-hoc-song-ngu-vi-sao-am-thanh-vang-doi-trong-nui","status":"publish","type":"post","link":"https:\/\/i-clc.edu.vn\/en\/kien-thuc-toan-khoa-hoc-song-ngu\/khoa-hoc-song-ngu-vi-sao-am-thanh-vang-doi-trong-nui\/","title":{"rendered":"Khoa h\u1ecdc song ng\u1eef: V\u00ec sao \u00e2m thanh vang d\u1ed9i trong n\u00fai?"},"content":{"rendered":"

B\u00e9 c\u00f3 bao gi\u1edd h\u00e9t th\u1eadt to gi\u1eefa n\u00fai r\u1eebng v\u00e0 nghe th\u1ea5y gi\u1ecdng m\u00ecnh \u201ctr\u1ea3 l\u1eddi\u201d l\u1ea1i ch\u01b0a? \u00c2m thanh vang d\u1ed9i nh\u01b0 c\u00f3 ai \u0111ang n\u00f3i chuy\u1ec7n c\u00f9ng m\u00ecnh v\u1eady! Hi\u1ec7n t\u01b0\u1ee3ng th\u00fa v\u1ecb \u1ea5y g\u1ecdi l\u00e0 <\/span>ti\u1ebfng v\u1ecdng (echo)<\/b>. H\u00e3y c\u00f9ng I-CLC t\u00ecm hi\u1ec3u v\u00ec sao \u00e2m thanh l\u1ea1i vang d\u1ed9i trong n\u00fai nh\u00e9!<\/span>
\n<\/span>Have you ever shouted loudly in the mountains and heard your voice \u201canswering\u201d back? It feels like someone else is talking to you! This fascinating phenomenon is called an <\/span>echo<\/b>. Let\u2019s join I-CLC to discover why sound echoes in the mountains!<\/span><\/p>\n

\u00c2m thanh truy\u1ec1n \u0111i nh\u01b0 th\u1ebf n\u00e0o?<\/b><\/p>\n

How does sound travel?<\/b><\/p>\n

\u00c2m thanh th\u1ef1c ch\u1ea5t l\u00e0 nh\u1eefng <\/span>s\u00f3ng rung \u0111\u1ed9ng<\/b> lan truy\u1ec1n trong kh\u00f4ng kh\u00ed. Khi B\u00e9 h\u00e9t l\u00ean, s\u00f3ng \u00e2m lan \u0111i theo nhi\u1ec1u h\u01b0\u1edbng kh\u00e1c nhau, cho \u0111\u1ebfn khi g\u1eb7p v\u1eadt c\u1ea3n nh\u01b0 v\u00e1ch n\u00fai, hang \u0111\u1ed9ng hay t\u01b0\u1eddng \u0111\u00e1.<\/span>
\n<\/span>Sound is actually <\/span>vibrating waves<\/b> that move through the air. When you shout, sound waves travel in all directions until they hit obstacles like cliffs, caves, or rocky walls.<\/span><\/p>\n

Hi\u1ec7n t\u01b0\u1ee3ng ph\u1ea3n x\u1ea1 \u00e2m<\/b><\/p>\n

Sound reflection<\/b><\/p>\n

Khi s\u00f3ng \u00e2m ch\u1ea1m v\u00e0o v\u00e1ch \u0111\u00e1, ch\u00fang s\u1ebd b\u1ecb <\/span>ph\u1ea3n x\u1ea1<\/b> tr\u1edf l\u1ea1i gi\u1ed1ng nh\u01b0 khi \u00e1nh s\u00e1ng ph\u1ea3n chi\u1ebfu trong g\u01b0\u01a1ng. \u00c2m thanh quay l\u1ea1i tai B\u00e9 sau m\u1ed9t kho\u1ea3ng th\u1eddi gian ng\u1eafn, t\u1ea1o th\u00e0nh ti\u1ebfng v\u1ecdng.<\/span>
\n<\/span>When sound waves hit a rocky surface, they get <\/span>reflected<\/b> back, just like light bouncing off a mirror. The sound returns to your ears after a short delay, creating an echo.<\/span><\/p>\n

\"\"<\/a><\/p>\n

V\u00ec sao ti\u1ebfng v\u1ecdng r\u00f5 h\u01a1n \u1edf n\u00fai?<\/b><\/p>\n

Why are echoes clearer in the mountains?<\/b><\/p>\n

\u1ede v\u00f9ng n\u00fai, v\u00e1ch \u0111\u00e1 v\u00e0 thung l\u0169ng r\u1ed9ng l\u1edbn t\u1ea1o ra nh\u1eefng b\u1ec1 m\u1eb7t c\u1ee9ng, ph\u1eb3ng v\u00e0 c\u00e1ch xa nhau. S\u00f3ng \u00e2m d\u1ec5 d\u00e0ng b\u1eadt l\u1ea1i nhi\u1ec1u l\u1ea7n, khi\u1ebfn ti\u1ebfng v\u1ecdng nghe r\u00f5 r\u00e0ng, vang d\u1ed9i. Trong khi \u0111\u00f3, \u1edf th\u00e0nh ph\u1ed1 nhi\u1ec1u v\u1eadt m\u1ec1m nh\u01b0 c\u00e2y, r\u00e8m, t\u01b0\u1eddng g\u1ea1ch h\u1ea5p th\u1ee5 \u00e2m thanh, n\u00ean kh\u00f3 nghe th\u1ea5y v\u1ecdng r\u00f5 nh\u01b0 \u1edf n\u00fai.<\/span>
\n<\/span>In the mountains, cliffs and wide valleys provide hard, flat, and distant surfaces. Sound waves easily bounce back several times, making echoes loud and clear. In cities, soft objects like trees, curtains, or brick walls absorb sound, so echoes are weaker.<\/span><\/p>\n

\"\"<\/a><\/p>\n

M\u1ed9t ch\u00fat th\u00fa v\u1ecb v\u1ec1 th\u1eddi gian v\u1ecdng<\/b><\/p>\n

A fun fact about echo timing<\/b><\/p>\n

N\u1ebfu v\u00e1ch \u0111\u00e1 c\u00e1ch b\u00e9 kho\u1ea3ng 170 m\u00e9t, \u00e2m thanh s\u1ebd m\u1ea5t ch\u1eebng <\/span>1 gi\u00e2y<\/b> \u0111\u1ec3 \u0111i v\u00e0 quay l\u1ea1i tai (v\u00ec t\u1ed1c \u0111\u1ed9 \u00e2m thanh kho\u1ea3ng 340 m\/s). Nh\u1edd \u0111\u00f3, tai B\u00e9 c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t r\u00f5 \u0111\u00e2u l\u00e0 ti\u1ebfng g\u1ed1c, \u0111\u00e2u l\u00e0 ti\u1ebfng v\u1ecdng.<\/span>
\n<\/span>If a cliff is about 170 meters away, sound takes roughly <\/span>1 second<\/b> to travel and return (since sound speed is about 340 m\/s). That\u2019s why your ears can tell the difference between the original sound and the echo.<\/span><\/p>\n

V\u1eady l\u00e0 ti\u1ebfng v\u1ecdng trong n\u00fai l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng thi\u00ean nhi\u00ean. \u0110\u00f3 l\u00e0 s\u00f3ng \u00e2m ph\u1ea3n x\u1ea1 t\u1eeb v\u00e1ch \u0111\u00e1 v\u00e0 thung l\u0169ng r\u1ed9ng l\u1edbn. L\u1ea7n t\u1edbi khi \u0111i d\u00e3 ngo\u1ea1i, th\u1eed h\u00e9t to m\u1ed9t ti\u1ebfng, B\u00e9 s\u1ebd nghe n\u00fai r\u1eebng \u201ch\u00e1t\u201d c\u00f9ng m\u00ecnh!<\/span>
\n<\/span>So, echoes in the mountains are a natural phenomenon. They are sound waves reflecting off cliffs and wide valleys. Next time you go on a trip, try shouting loudly \u2014 you\u2019ll hear the mountains \u201csing\u201d along with you!<\/span><\/p>\n

S\u01b0u t\u1ea7m<\/b>
\n<\/b>Collected<\/span><\/p>\n

LANGUAGE CENTER INTERCONTINENTAL (I-CLC)<\/b>
\n<\/b>CN TP.HCM: 64 \u0110\u01b0\u1eddng 85, Ph\u01b0\u1eddng T\u00e2n H\u01b0ng, TP. HCM<\/span>
\n<\/span>CN Nha Trang: Plot no. 12, Road B2, Urban Area, Vinh Diem Trung, Vinh Hiep, ho chi minh City, Nha Trang<\/span>
\n<\/span> 0917729932<\/span><\/p>\n

#ICLC #tienganhtreem #khoahoc #kienthucsongngu<\/span><\/p>\n

 <\/p>","protected":false},"excerpt":{"rendered":"

B\u00e9 c\u00f3 bao gi\u1edd h\u00e9t th\u1eadt to gi\u1eefa n\u00fai r\u1eebng v\u00e0 nghe th\u1ea5y gi\u1ecdng m\u00ecnh \u201ctr\u1ea3 l\u1eddi\u201d l\u1ea1i ch\u01b0a? \u00c2m thanh vang d\u1ed9i nh\u01b0 c\u00f3 ai \u0111ang n\u00f3i chuy\u1ec7n c\u00f9ng m\u00ecnh v\u1eady! Hi\u1ec7n t\u01b0\u1ee3ng th\u00fa v\u1ecb \u1ea5y g\u1ecdi l\u00e0 ti\u1ebfng v\u1ecdng (echo). H\u00e3y c\u00f9ng I-CLC t\u00ecm hi\u1ec3u v\u00ec sao \u00e2m thanh l\u1ea1i vang d\u1ed9i trong …<\/p>\n

Khoa h\u1ecdc song ng\u1eef: V\u00ec sao \u00e2m thanh vang d\u1ed9i trong n\u00fai?<\/span> Read More »<\/a><\/p>","protected":false},"author":427,"featured_media":27733,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","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":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"categories":[188],"tags":[],"class_list":["post-27731","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kien-thuc-toan-khoa-hoc-song-ngu"],"acf":[],"_links":{"self":[{"href":"https:\/\/i-clc.edu.vn\/en\/wp-json\/wp\/v2\/posts\/27731","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i-clc.edu.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i-clc.edu.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i-clc.edu.vn\/en\/wp-json\/wp\/v2\/users\/427"}],"replies":[{"embeddable":true,"href":"https:\/\/i-clc.edu.vn\/en\/wp-json\/wp\/v2\/comments?post=27731"}],"version-history":[{"count":2,"href":"https:\/\/i-clc.edu.vn\/en\/wp-json\/wp\/v2\/posts\/27731\/revisions"}],"predecessor-version":[{"id":27737,"href":"https:\/\/i-clc.edu.vn\/en\/wp-json\/wp\/v2\/posts\/27731\/revisions\/27737"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/i-clc.edu.vn\/en\/wp-json\/wp\/v2\/media\/27733"}],"wp:attachment":[{"href":"https:\/\/i-clc.edu.vn\/en\/wp-json\/wp\/v2\/media?parent=27731"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i-clc.edu.vn\/en\/wp-json\/wp\/v2\/categories?post=27731"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i-clc.edu.vn\/en\/wp-json\/wp\/v2\/tags?post=27731"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}