{"id":45300,"date":"2023-04-22T02:59:14","date_gmt":"2023-04-22T07:59:14","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-make-high-frequency-sound-generator\/"},"modified":"2025-01-21T07:18:37","modified_gmt":"2025-01-21T12:18:37","slug":"how-to-make-high-frequency-sound-generator","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-to-make-high-frequency-sound-generator\/","title":{"rendered":"T\u1ef1 ch\u1ebf m\u00e1y ph\u00e1t \u00e2m thanh t\u1ea7n s\u1ed1 cao"},"content":{"rendered":"

\u00c2m thanh cao t\u1ea7n, hay c\u00f2n g\u1ecdi l\u00e0 si\u00eau \u00e2m, c\u00f3 t\u1ea7n s\u1ed1 v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi (th\u01b0\u1eddng tr\u00ean 20kHz). Vi\u1ec7c t\u1ea1o ra \u00e2m thanh cao t\u1ea7n c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng trong cu\u1ed9c s\u1ed1ng, t\u1eeb c\u00e1c thi\u1ebft b\u1ecb y t\u1ebf, l\u00e0m s\u1ea1ch b\u1eb1ng s\u00f3ng si\u00eau \u00e2m cho \u0111\u1ebfn c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd h\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch ch\u1ebf t\u1ea1o m\u1ed9t m\u00e1y ph\u00e1t \u00e2m thanh cao t\u1ea7n \u0111\u01a1n gi\u1ea3n.<\/p>\n

Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng<\/h3>\n

M\u00e1y ph\u00e1t \u00e2m thanh cao t\u1ea7n ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd bi\u1ebfn \u0111\u1ed5i t\u00edn hi\u1ec7u \u0111i\u1ec7n th\u00e0nh t\u00edn hi\u1ec7u \u00e2m thanh. M\u1ed9t m\u1ea1ch \u0111i\u1ec7n t\u1eed s\u1ebd t\u1ea1o ra t\u00edn hi\u1ec7u \u0111i\u1ec7n dao \u0111\u1ed9ng \u1edf t\u1ea7n s\u1ed1 cao, t\u00edn hi\u1ec7u n\u00e0y sau \u0111\u00f3 \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o m\u1ed9t b\u1ed9 ph\u1eadn chuy\u1ec3n \u0111\u1ed5i (transducer) \u0111\u1ec3 bi\u1ebfn th\u00e0nh s\u00f3ng \u00e2m. B\u1ed9 ph\u1eadn chuy\u1ec3n \u0111\u1ed5i ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 loa piezo, lo\u1ea1i loa ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n.<\/p>\n

Linh ki\u1ec7n c\u1ea7n thi\u1ebft<\/h3>\n

\u0110\u1ec3 ch\u1ebf t\u1ea1o m\u00e1y ph\u00e1t \u00e2m thanh cao t\u1ea7n, b\u1ea1n c\u1ea7n chu\u1ea9n b\u1ecb c\u00e1c linh ki\u1ec7n sau:<\/p>\n\n\n\n\n\n\n\n\n\n\n
Linh ki\u1ec7n<\/th>\nM\u00f4 t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
Loa Piezo<\/td>\nBi\u1ebfn \u0111\u1ed5i t\u00edn hi\u1ec7u \u0111i\u1ec7n th\u00e0nh s\u00f3ng \u00e2m<\/td>\n<\/tr>\n
B\u1ed9 t\u1ea1o dao \u0111\u1ed9ng (oscillator)<\/td>\nT\u1ea1o ra t\u00edn hi\u1ec7u \u0111i\u1ec7n dao \u0111\u1ed9ng<\/td>\n<\/tr>\n
Ngu\u1ed3n \u0111i\u1ec7n<\/td>\nCung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng cho m\u1ea1ch \u0111i\u1ec7n<\/td>\n<\/tr>\n
\u0110i\u1ec7n tr\u1edf, t\u1ee5 \u0111i\u1ec7n<\/td>\n\u0110i\u1ec1u ch\u1ec9nh t\u1ea7n s\u1ed1 v\u00e0 bi\u00ean \u0111\u1ed9 c\u1ee7a t\u00edn hi\u1ec7u<\/td>\n<\/tr>\n
M\u1ea1ch in (PCB) ho\u1eb7c breadboard<\/td>\nK\u1ebft n\u1ed1i c\u00e1c linh ki\u1ec7n<\/td>\n<\/tr>\n
D\u00e2y n\u1ed1i, m\u1ecf h\u00e0n<\/td>\nD\u00f9ng \u0111\u1ec3 l\u1eafp r\u00e1p m\u1ea1ch<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

B\u1ed9 t\u1ea1o dao \u0111\u1ed9ng (Oscillator)<\/h3>\n

C\u00f3 nhi\u1ec1u lo\u1ea1i b\u1ed9 t\u1ea1o dao \u0111\u1ed9ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng, v\u00ed d\u1ee5 nh\u01b0 555 timer, ho\u1eb7c c\u00e1c IC chuy\u00ean d\u1ee5ng kh\u00e1c. Vi\u1ec7c l\u1ef1a ch\u1ecdn IC ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 mong mu\u1ed1n v\u00e0 \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a m\u1ea1ch. 555 timer l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn cho c\u00e1c m\u1ea1ch \u0111\u01a1n gi\u1ea3n, d\u1ec5 t\u00ecm mua v\u00e0 gi\u00e1 th\u00e0nh r\u1ebb.<\/p>\n

L\u1eafp r\u00e1p m\u1ea1ch<\/h3>\n

Sau khi chu\u1ea9n b\u1ecb \u0111\u1ea7y \u0111\u1ee7 linh ki\u1ec7n, b\u1ea1n c\u1ea7n l\u1eafp r\u00e1p ch\u00fang theo s\u01a1 \u0111\u1ed3 m\u1ea1ch. S\u01a1 \u0111\u1ed3 m\u1ea1ch s\u1ebd kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o lo\u1ea1i b\u1ed9 t\u1ea1o dao \u0111\u1ed9ng b\u1ea1n s\u1eed d\u1ee5ng. B\u1ea1n c\u00f3 th\u1ec3 t\u00ecm th\u1ea5y nhi\u1ec1u s\u01a1 \u0111\u1ed3 m\u1ea1ch m\u00e1y ph\u00e1t \u00e2m thanh cao t\u1ea7n tr\u00ean internet. H\u00e3y ch\u1eafc ch\u1eafn r\u1eb1ng b\u1ea1n hi\u1ec3u r\u00f5 s\u01a1 \u0111\u1ed3 m\u1ea1ch tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u l\u1eafp r\u00e1p. S\u1eed d\u1ee5ng m\u1ecf h\u00e0n \u0111\u1ec3 h\u00e0n c\u00e1c linh ki\u1ec7n l\u00ean m\u1ea1ch in ho\u1eb7c k\u1ebft n\u1ed1i ch\u00fang tr\u00ean breadboard.<\/p>\n

\u0110i\u1ec1u ch\u1ec9nh t\u1ea7n s\u1ed1<\/h3>\n

T\u1ea7n s\u1ed1 c\u1ee7a \u00e2m thanh \u0111\u01b0\u1ee3c t\u1ea1o ra ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a \u0111i\u1ec7n tr\u1edf v\u00e0 t\u1ee5 \u0111i\u1ec7n trong m\u1ea1ch dao \u0111\u1ed9ng. B\u1ea1n c\u00f3 th\u1ec3 thay \u0111\u1ed5i gi\u00e1 tr\u1ecb c\u1ee7a c\u00e1c linh ki\u1ec7n n\u00e0y \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh t\u1ea7n s\u1ed1 theo \u00fd mu\u1ed1n. S\u1eed d\u1ee5ng \u0111\u1ed3ng h\u1ed3 \u0111o t\u1ea7n s\u1ed1 \u0111\u1ec3 ki\u1ec3m tra t\u1ea7n s\u1ed1 \u0111\u1ea7u ra.<\/p>\n

Ki\u1ec3m tra ho\u1ea1t \u0111\u1ed9ng<\/h3>\n

Sau khi ho\u00e0n th\u00e0nh vi\u1ec7c l\u1eafp r\u00e1p, k\u1ebft n\u1ed1i ngu\u1ed3n \u0111i\u1ec7n v\u00e0 ki\u1ec3m tra ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ea1ch. N\u1ebfu m\u1ea1ch ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang, loa piezo s\u1ebd ph\u00e1t ra \u00e2m thanh cao t\u1ea7n. L\u01b0u \u00fd r\u1eb1ng tai ng\u01b0\u1eddi kh\u00f4ng th\u1ec3 nghe \u0111\u01b0\u1ee3c \u00e2m thanh c\u00f3 t\u1ea7n s\u1ed1 qu\u00e1 cao. B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u1ed9t microphone k\u1ebft n\u1ed1i v\u1edbi m\u00e1y hi\u1ec7n s\u00f3ng \u0111\u1ec3 quan s\u00e1t t\u00edn hi\u1ec7u \u00e2m thanh.<\/p>\n

Vi\u1ec7c ch\u1ebf t\u1ea1o m\u00e1y ph\u00e1t \u00e2m thanh cao t\u1ea7n \u0111\u00f2i h\u1ecfi ki\u1ebfn th\u1ee9c v\u1ec1 \u0111i\u1ec7n t\u1eed v\u00e0 k\u1ef9 n\u0103ng h\u00e0n m\u1ea1ch. Tuy nhi\u00ean, v\u1edbi c\u00e1c h\u01b0\u1edbng d\u1eabn chi ti\u1ebft v\u00e0 s\u1ef1 ki\u00ean nh\u1eabn, b\u1ea1n ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 t\u1ef1 tay ch\u1ebf t\u1ea1o m\u1ed9t m\u00e1y ph\u00e1t \u00e2m thanh cao t\u1ea7n \u0111\u01a1n gi\u1ea3n. Hy v\u1ecdng b\u00e0i vi\u1ebft n\u00e0y \u0111\u00e3 cung c\u1ea5p cho b\u1ea1n nh\u1eefng th\u00f4ng tin h\u1eefu \u00edch.<\/p>\n","protected":false},"excerpt":{"rendered":"

\u00c2m thanh cao t\u1ea7n, hay c\u00f2n g\u1ecdi l\u00e0 si\u00eau \u00e2m, c\u00f3 t\u1ea7n s\u1ed1 v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi (th\u01b0\u1eddng tr\u00ean 20kHz). Vi\u1ec7c t\u1ea1o ra \u00e2m thanh cao t\u1ea7n c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng trong cu\u1ed9c s\u1ed1ng, t\u1eeb c\u00e1c thi\u1ebft b\u1ecb y t\u1ebf, l\u00e0m s\u1ea1ch b\u1eb1ng s\u00f3ng si\u00eau \u00e2m cho \u0111\u1ebfn c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng<\/p>\n","protected":false},"author":1,"featured_media":26475,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-45300","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","prodpage-classic"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/45300","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/comments?post=45300"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/45300\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/26475"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=45300"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=45300"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=45300"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}