C\u00e1c nh\u1ea1c c\u1ee5 nh\u01b0 acm\u00f4nica, vi\u00f4l\u00f4ng, piano v.v. c\u00f3 th\u1ec3 t\u1ea5u ra c\u00e1c lo\u1ea1i b\u1ea3n nh\u1ea1c, ch\u00fang ta kh\u00f4ng c\u1ea3m th\u1ea5y k\u00ec l\u1ea1, v\u00ec trong acm\u00f4nica c\u00f3 l\u01b0\u1ee1i g\u00e0, vi\u00f4l\u00f4ng c\u00f3 d\u00e2y \u0111\u00e0n, trong piano c\u00f3 nh\u1eefng d\u00e2y th\u00e9p th\u00f4, m\u1ea3nh kh\u00e1c nhau. Ch\u00ednh l\u00e0 s\u1ef1 rung \u0111\u1ed9ng c\u1ee7a c\u00e1c v\u1eadt th\u1ec3 nh\u01b0 l\u01b0\u1ee1i g\u00e0, d\u00e2y \u0111\u00e0n, d\u00e2y th\u00e9p v.v. \u0111\u00e3 sinh ra c\u00e1c lo\u1ea1i \u00e2m thanh, t\u1ea5u ra c\u00e1c b\u1ea3n nh\u1ea1c \u00eam tai.<\/p>\n\n\n\n
V\u1eady m\u1ed9t c\u00e2y s\u00e1o l\u00e0m b\u1eb1ng \u1ed1ng tr\u00fac, b\u00ean trong ch\u1eb3ng h\u1ec1 c\u00f3 th\u1ee9 g\u00ec c\u1ea3, ch\u1ec9 c\u00f3 v\u00e0i c\u00e1i l\u1ed7 kho\u00e9t tr\u00ean \u1ed1ng, sao c\u0169ng c\u00f3 th\u1ec3 th\u1ed5i ra b\u1ea3n nh\u1ea1c nh\u1ec9?<\/p>\n\n\n\n
\u00c2m thanh l\u00e0 do v\u1eadt th\u1ec3 dao \u0111\u1ed9ng g\u00e2y n\u00ean. L\u01b0\u1ee1i g\u00e0, d\u00e2y \u0111\u00e0n ho\u1eb7c d\u00e2y th\u00e9p dao \u0111\u1ed9ng c\u00f3 th\u1ec3 ph\u00e1t ra \u00e2m thanh. C\u0169ng c\u00f9ng m\u1ed9t nguy\u00ean l\u00ed nh\u01b0 v\u1eady, khi ch\u1ea5t l\u1ecfng v\u00e0 ch\u1ea5t kh\u00ed x\u1ea3y ra dao \u0111\u1ed9ng m\u1ea1nh, c\u0169ng s\u1ebd ph\u00e1t ra \u00e2m thanh.<\/p>\n\n\n\n
B\u00ean trong c\u00e2y s\u00e1o tuy ch\u1ec9 l\u00e0 kh\u00f4ng kh\u00ed, nh\u01b0ng l\u1ea1i l\u00e0 m\u1ed9t c\u1ed9t kh\u00f4ng kh\u00ed kh\u00f4ng nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c. Khi n\u00f3 b\u1ecb ngo\u1ea1i l\u1ef1c k\u00edch \u0111\u1ed9ng, s\u1ebd ph\u00e1t ra \u00e2m thanh theo m\u1ed9t t\u1ea7n s\u1ed1 nh\u1ea5t \u0111\u1ecbnh. C\u1ed9t kh\u00f4ng kh\u00ed c\u00e0ng d\u00e0i, t\u1ea7n s\u1ed1 c\u00e0ng th\u1ea5p, \u00e2m \u0111i\u1ec7u c\u1ee7a \u00e2m thanh ph\u00e1t ra th\u1ea5p; c\u1ed9t kh\u00f4ng kh\u00ed c\u00e0ng ng\u1eafn, t\u1ea7n s\u1ed1 c\u00e0ng cao, \u00e2m \u0111i\u1ec7u c\u1ee7a \u00e2m thanh ph\u00e1t ra c\u0169ng c\u00e0ng cao. Khi b\u1ea1n \u0111\u1eb7t m\u00f4i l\u00ean l\u1ed7 th\u1ed5i, th\u1ed5i ra m\u1ed9t lu\u1ed3ng h\u01a1i v\u1eeba d\u1eb9t v\u1eeba h\u1eb9p \u0111\u1ec3 k\u00edch \u0111\u1ed9ng c\u1ed9t kh\u00f4ng kh\u00ed trong c\u00e2y s\u00e1o, n\u00f3 li\u1ec1n ph\u00e1t ra \u00e2m thanh. N\u1ebfu b\u1ecbt h\u1ebft t\u1ea5t c\u1ea3 s\u00e1u c\u00e1i l\u1ed7, b\u00ean trong c\u00e2y s\u00e1o li\u1ec1n h\u00ecnh th\u00e0nh m\u1ed9t c\u1ed9t kh\u00f4ng kh\u00ed d\u00e0i nh\u1ea5t, \u00e2m \u0111i\u1ec7u c\u1ee7a \u00e2m thanh ph\u00e1t ra th\u1ea5p nh\u1ea5t; n\u1ebfu b\u1ea1n l\u1ea7n l\u01b0\u1ee3t bu\u00f4ng r\u1eddi c\u00e1c l\u1ed7 c\u00e1ch l\u1ed7 th\u1ed5i t\u1eeb xa \u0111\u1ebfn g\u1ea7n, c\u1ed9t kh\u00f4ng kh\u00ed s\u1ebd c\u00e1i sau ng\u1eafn h\u01a1n c\u00e1i tr\u01b0\u1edbc v\u00e0 \u00e2m thanh ph\u00e1t ra c\u0169ng ti\u1ebfng sau cao h\u01a1n ti\u1ebfng tr\u01b0\u1edbc. Ng\u01b0\u1eddi th\u1ed5i s\u00e1o d\u1ef1a v\u00e0o k\u00ed hi\u1ec7u c\u1ee7a b\u1ea3n nh\u1ea1c, bu\u00f4ng ra ho\u1eb7c b\u1ecbt l\u1ea1i c\u00e1c l\u1ed7 kh\u00e1c nhau, l\u00e0m cho c\u1ed9t kh\u00f4ng kh\u00ed ch\u1ee3t d\u00e0i ch\u1ee3t ng\u1eafn, s\u1ebd th\u1ed5i ra b\u1ea3n nh\u1ea1c \u00eam tai.<\/p>\n\n\n\n
Ng\u01b0\u1eddi di\u1ec5n t\u1ea5u c\u00f2n c\u00f3 th\u1ec3 d\u00f9ng c\u00e1ch “th\u1ed5i si\u00eau”, t\u1ee9c l\u00e0 gia t\u0103ng \u00e1p l\u1ef1c th\u1ed5i, c\u00f3 th\u1ec3 th\u1ed5i ra \u00e2m thanh cao h\u01a1n m\u1ed9t qu\u00e3ng t\u00e1m so v\u1edbi \u00e2m g\u1ed1c. V\u00ed d\u1ee5 th\u1ed5i \u00e2m “\u0111\u00f4”, ng\u00f3n tay kh\u00f4ng \u0111\u1ed5i, v\u1eadn d\u1ee5ng c\u00e1ch th\u1ed5i ti\u00eau, c\u00f3 th\u1ec3 th\u1ed5i ra \u00e2m “\u0111\u00f4” cao. Cho n\u00ean, c\u00e2y s\u00e1o tuy ch\u1ec9 c\u00f3 6 l\u1ed7, nh\u01b0ng \u1edf trong tay ng\u01b0\u1eddi di\u1ec5n t\u1ea5u t\u00e0i hoa, v\u1eabn c\u00f3 th\u1ec3 th\u1ed5i ra c\u00e1c b\u1ea3n nh\u1ea1c r\u00e9o r\u1eaft du d\u01b0\u01a1ng c\u01a1 \u0111\u1ea5y!<\/p>\n\n\n\n
T\u1eeb kho\u00e1: C\u00e2y s\u00e1o; \u00c2m thanh; B\u1ea3n nh\u1ea1c; \u00c2m \u0111i\u1ec7u; C\u1ed9t kh\u00f4ng kh\u00ed.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
C\u00e1c nh\u1ea1c c\u1ee5 nh\u01b0 acm\u00f4nica, vi\u00f4l\u00f4ng, piano v.v. c\u00f3 th\u1ec3 t\u1ea5u ra c\u00e1c lo\u1ea1i b\u1ea3n nh\u1ea1c, ch\u00fang ta kh\u00f4ng c\u1ea3m th\u1ea5y k\u00ec l\u1ea1, v\u00ec trong acm\u00f4nica c\u00f3 l\u01b0\u1ee1i g\u00e0, vi\u00f4l\u00f4ng c\u00f3 d\u00e2y \u0111\u00e0n, trong piano c\u00f3 nh\u1eefng d\u00e2y th\u00e9p th\u00f4, m\u1ea3nh kh\u00e1c nhau. Ch\u00ednh l\u00e0 s\u1ef1 rung \u0111\u1ed9ng c\u1ee7a c\u00e1c v\u1eadt th\u1ec3 nh\u01b0 l\u01b0\u1ee1i g\u00e0, […]<\/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-5638","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\/5638","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=5638"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/5638\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=5638"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=5638"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=5638"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}