{"id":52268,"date":"2023-04-21T12:59:06","date_gmt":"2023-04-21T17:59:06","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/diy-infrasound-generator\/"},"modified":"2025-01-21T07:08:28","modified_gmt":"2025-01-21T12:08:28","slug":"diy-infrasound-generator","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/diy-infrasound-generator\/","title":{"rendered":"T\u1ef1 ch\u1ebf m\u00e1y ph\u00e1t h\u1ea1 \u00e2m: Kh\u00e1m ph\u00e1 th\u1ebf gi\u1edbi t\u1ea7n s\u1ed1 th\u1ea5p"},"content":{"rendered":"

\u00c2m thanh h\u1ea1 \u00e2m, n\u1eb1m d\u01b0\u1edbi ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi, lu\u00f4n mang m\u1ed9t v\u1ebb b\u00ed \u1ea9n v\u00e0 th\u00fa v\u1ecb. Vi\u1ec7c t\u1ef1 ch\u1ebf t\u1ea1o m\u1ed9t m\u00e1y ph\u00e1t h\u1ea1 \u00e2m tuy kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t d\u1ef1 \u00e1n \u0111\u01a1n gi\u1ea3n, nh\u01b0ng l\u1ea1i l\u00e0 m\u1ed9t th\u1eed th\u00e1ch h\u1ea5p d\u1eabn cho nh\u1eefng ng\u01b0\u1eddi \u0111am m\u00ea \u0111i\u1ec7n t\u1eed v\u00e0 \u00e2m thanh. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd h\u01b0\u1edbng d\u1eabn b\u1ea1n c\u00e1ch x\u00e2y d\u1ef1ng m\u1ed9t m\u00e1y ph\u00e1t h\u1ea1 \u00e2m \u0111\u01a1n gi\u1ea3n, c\u00f9ng v\u1edbi nh\u1eefng l\u01b0u \u00fd quan tr\u1ecdng trong qu\u00e1 tr\u00ecnh th\u1ef1c hi\u1ec7n.<\/p>\n

Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00e1y ph\u00e1t h\u1ea1 \u00e2m<\/h3>\n

M\u00e1y ph\u00e1t h\u1ea1 \u00e2m ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd t\u1ea1o ra nh\u1eefng dao \u0111\u1ed9ng c\u01a1 h\u1ecdc v\u1edbi t\u1ea7n s\u1ed1 th\u1ea5p, th\u01b0\u1eddng d\u01b0\u1edbi 20Hz. C\u00e1c dao \u0111\u1ed9ng n\u00e0y sau \u0111\u00f3 \u0111\u01b0\u1ee3c khu\u1ebfch \u0111\u1ea1i v\u00e0 truy\u1ec1n qua m\u00f4i tr\u01b0\u1eddng, t\u1ea1o th\u00e0nh s\u00f3ng h\u1ea1 \u00e2m. C\u00f3 nhi\u1ec1u c\u00e1ch \u0111\u1ec3 t\u1ea1o ra nh\u1eefng dao \u0111\u1ed9ng n\u00e0y, t\u1eeb vi\u1ec7c s\u1eed d\u1ee5ng loa subwoofer \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh \u0111\u1eb7c bi\u1ec7t, \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb c\u01a1 kh\u00ed nh\u01b0 qu\u1ea1t l\u1edbn quay ch\u1eadm.<\/p>\n

C\u00e1c linh ki\u1ec7n c\u1ea7n thi\u1ebft<\/h3>\n

\u0110\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t m\u00e1y ph\u00e1t h\u1ea1 \u00e2m \u0111\u01a1n gi\u1ea3n, b\u1ea1n s\u1ebd c\u1ea7n nh\u1eefng linh ki\u1ec7n sau:<\/p>\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 subwoofer<\/td>\nCh\u1ecdn lo\u1ea1i c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn v\u00e0 kh\u1ea3 n\u0103ng t\u00e1i t\u1ea1o t\u1ea7n s\u1ed1 th\u1ea5p.<\/td>\n<\/tr>\n
B\u1ed9 khu\u1ebfch \u0111\u1ea1i \u00e2m thanh<\/td>\nC\u00f4ng su\u1ea5t ph\u00f9 h\u1ee3p v\u1edbi loa subwoofer.<\/td>\n<\/tr>\n
M\u00e1y ph\u00e1t t\u00edn hi\u1ec7u<\/td>\nC\u00f3 kh\u1ea3 n\u0103ng t\u1ea1o ra t\u00edn hi\u1ec7u s\u00f3ng sine v\u1edbi t\u1ea7n s\u1ed1 th\u1ea5p.<\/td>\n<\/tr>\n
Ngu\u1ed3n \u0111i\u1ec7n<\/td>\nCung c\u1ea5p \u0111i\u1ec7n cho b\u1ed9 khu\u1ebfch \u0111\u1ea1i v\u00e0 m\u00e1y ph\u00e1t t\u00edn hi\u1ec7u.<\/td>\n<\/tr>\n
D\u00e2y d\u1eabn v\u00e0 c\u00e1c linh ki\u1ec7n \u0111i\u1ec7n t\u1eed kh\u00e1c<\/td>\nT\u00f9y thu\u1ed9c v\u00e0o thi\u1ebft k\u1ebf c\u1ee5 th\u1ec3.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00e1c b\u01b0\u1edbc th\u1ef1c hi\u1ec7n<\/h3>\n
    \n
  1. K\u1ebft n\u1ed1i m\u00e1y ph\u00e1t t\u00edn hi\u1ec7u v\u1edbi b\u1ed9 khu\u1ebfch \u0111\u1ea1i.<\/strong> \u0110\u1ea3m b\u1ea3o t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n \u0111\u00fang c\u00e1ch v\u00e0 m\u1ee9c \u00e2m l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh ph\u00f9 h\u1ee3p.<\/li>\n
  2. K\u1ebft n\u1ed1i b\u1ed9 khu\u1ebfch \u0111\u1ea1i v\u1edbi loa subwoofer.<\/strong> Ki\u1ec3m tra k\u1ef9 c\u00e1c k\u1ebft n\u1ed1i \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3.<\/li>\n
  3. C\u00e0i \u0111\u1eb7t t\u1ea7n s\u1ed1 tr\u00ean m\u00e1y ph\u00e1t t\u00edn hi\u1ec7u.<\/strong> B\u1eaft \u0111\u1ea7u v\u1edbi t\u1ea7n s\u1ed1 kho\u1ea3ng 15Hz v\u00e0 t\u1eeb t\u1eeb gi\u1ea3m xu\u1ed1ng \u0111\u1ec3 t\u00ecm t\u1ea7n s\u1ed1 mong mu\u1ed1n.<\/li>\n
  4. Ki\u1ec3m tra ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00e1y ph\u00e1t.<\/strong> L\u01b0u \u00fd r\u1eb1ng b\u1ea1n s\u1ebd kh\u00f4ng nghe th\u1ea5y \u00e2m thanh tr\u1ef1c ti\u1ebfp, nh\u01b0ng c\u00f3 th\u1ec3 c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c s\u1ef1 rung \u0111\u1ed9ng ho\u1eb7c \u00e1p su\u1ea5t.<\/li>\n<\/ol>\n

    Nh\u1eefng l\u01b0u \u00fd quan tr\u1ecdng<\/h3>\n

    Vi\u1ec7c ti\u1ebfp x\u00fac v\u1edbi h\u1ea1 \u00e2m \u1edf c\u01b0\u1eddng \u0111\u1ed9 cao c\u00f3 th\u1ec3 g\u00e2y ra nh\u1eefng \u1ea3nh h\u01b0\u1edfng ti\u00eau c\u1ef1c \u0111\u1ebfn s\u1ee9c kh\u1ecfe. V\u00ec v\u1eady, c\u1ea7n h\u1ebft s\u1ee9c th\u1eadn tr\u1ecdng khi th\u1eed nghi\u1ec7m m\u00e1y ph\u00e1t h\u1ea1 \u00e2m. N\u00ean th\u1ef1c hi\u1ec7n trong kh\u00f4ng gian r\u1ed9ng v\u00e0 tho\u00e1ng, h\u1ea1n ch\u1ebf th\u1eddi gian ti\u1ebfp x\u00fac v\u00e0 gi\u1eef m\u1ee9c \u00e2m l\u01b0\u1ee3ng \u1edf m\u1ee9c th\u1ea5p. Tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng h\u01b0\u1edbng m\u00e1y ph\u00e1t v\u1ec1 ph\u00eda ng\u01b0\u1eddi ho\u1eb7c \u0111\u1ed9ng v\u1eadt.<\/p>\n

    Bi\u1ebfn th\u1ec3 v\u00e0 c\u1ea3i ti\u1ebfn<\/h3>\n

    C\u00f3 th\u1ec3 c\u1ea3i ti\u1ebfn m\u00e1y ph\u00e1t h\u1ea1 \u00e2m b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c b\u1ed9 l\u1ecdc \u00e2m thanh \u0111\u1ec3 lo\u1ea1i b\u1ecf c\u00e1c t\u1ea7n s\u1ed1 kh\u00f4ng mong mu\u1ed1n, ho\u1eb7c s\u1eed d\u1ee5ng c\u00e1c ph\u1ea7n m\u1ec1m chuy\u00ean d\u1ee5ng \u0111\u1ec3 t\u1ea1o ra c\u00e1c d\u1ea1ng s\u00f3ng ph\u1ee9c t\u1ea1p h\u01a1n.<\/p>\n

    Vi\u1ec7c t\u1ef1 ch\u1ebf t\u1ea1o m\u00e1y ph\u00e1t h\u1ea1 \u00e2m l\u00e0 m\u1ed9t d\u1ef1 \u00e1n th\u00fa v\u1ecb v\u00e0 mang t\u00ednh th\u1eed th\u00e1ch. Tuy nhi\u00ean, c\u1ea7n lu\u00f4n nh\u1edb \u0111\u1ebfn nh\u1eefng r\u1ee7i ro ti\u1ec1m \u1ea9n v\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c bi\u1ec7n ph\u00e1p an to\u00e0n c\u1ea7n thi\u1ebft. Hy v\u1ecdng b\u00e0i vi\u1ebft n\u00e0y \u0111\u00e3 cung c\u1ea5p cho b\u1ea1n nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n \u0111\u1ec3 b\u1eaft \u0111\u1ea7u h\u00e0nh tr\u00ecnh kh\u00e1m ph\u00e1 th\u1ebf gi\u1edbi \u00e2m thanh h\u1ea1 \u00e2m.<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u00c2m thanh h\u1ea1 \u00e2m, n\u1eb1m d\u01b0\u1edbi ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi, lu\u00f4n mang m\u1ed9t v\u1ebb b\u00ed \u1ea9n v\u00e0 th\u00fa v\u1ecb. Vi\u1ec7c t\u1ef1 ch\u1ebf t\u1ea1o m\u1ed9t m\u00e1y ph\u00e1t h\u1ea1 \u00e2m tuy kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t d\u1ef1 \u00e1n \u0111\u01a1n gi\u1ea3n, nh\u01b0ng l\u1ea1i l\u00e0 m\u1ed9t th\u1eed th\u00e1ch h\u1ea5p d\u1eabn cho nh\u1eefng ng\u01b0\u1eddi \u0111am m\u00ea \u0111i\u1ec7n t\u1eed v\u00e0 \u00e2m<\/p>\n","protected":false},"author":1,"featured_media":26461,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-52268","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\/52268","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=52268"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/52268\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/26461"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=52268"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=52268"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=52268"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}