{"id":48852,"date":"2023-04-21T22:56:39","date_gmt":"2023-04-22T03:56:39","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-make-a-sonic-weapon\/"},"modified":"2025-01-21T07:17:29","modified_gmt":"2025-01-21T12:17:29","slug":"how-to-make-a-sonic-weapon","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-to-make-a-sonic-weapon\/","title":{"rendered":"Ch\u1ebf t\u1ea1o v\u0169 kh\u00ed \u00e2m thanh: H\u01b0\u1edbng d\u1eabn chi ti\u1ebft"},"content":{"rendered":"<p>\u00c2m thanh, ngo\u00e0i vi\u1ec7c mang l\u1ea1i nh\u1eefng giai \u0111i\u1ec7u \u00eam tai, c\u00f2n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 m\u1ed9t c\u00f4ng c\u1ee5, th\u1eadm ch\u00ed l\u00e0 v\u0169 kh\u00ed. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o kh\u00eda c\u1ea1nh \u00edt \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn n\u00e0y: c\u00e1ch ch\u1ebf t\u1ea1o m\u1ed9t v\u0169 kh\u00ed \u00e2m thanh. Xin l\u01b0u \u00fd r\u1eb1ng vi\u1ec7c ch\u1ebf t\u1ea1o v\u00e0 s\u1eed d\u1ee5ng v\u0169 kh\u00ed \u00e2m thanh c\u00f3 th\u1ec3 vi ph\u1ea1m ph\u00e1p lu\u1eadt v\u00e0 g\u00e2y nguy hi\u1ec3m. Th\u00f4ng tin d\u01b0\u1edbi \u0111\u00e2y ch\u1ec9 mang t\u00ednh ch\u1ea5t l\u00fd thuy\u1ebft v\u00e0 gi\u00e1o d\u1ee5c, kh\u00f4ng khuy\u1ebfn kh\u00edch b\u1ea5t k\u1ef3 h\u00e0nh vi n\u00e0o li\u00ean quan \u0111\u1ebfn vi\u1ec7c ch\u1ebf t\u1ea1o ho\u1eb7c s\u1eed d\u1ee5ng v\u0169 kh\u00ed.<\/p>\n<h3>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a v\u0169 kh\u00ed \u00e2m thanh<\/h3>\n<p>V\u0169 kh\u00ed \u00e2m thanh, hay c\u00f2n g\u1ecdi l\u00e0 v\u0169 kh\u00ed s\u00f3ng \u00e2m, ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd s\u1eed d\u1ee5ng s\u00f3ng \u00e2m thanh \u1edf t\u1ea7n s\u1ed1 v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 cao \u0111\u1ec3 g\u00e2y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1ee5c ti\u00eau.  T\u00e1c \u0111\u1ed9ng c\u00f3 th\u1ec3 t\u1eeb g\u00e2y kh\u00f3 ch\u1ecbu, m\u1ea5t ph\u01b0\u01a1ng h\u01b0\u1edbng, cho \u0111\u1ebfn t\u1ed5n th\u01b0\u01a1ng v\u1eadt l\u00fd. T\u1ea7n s\u1ed1 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng n\u1eb1m trong kho\u1ea3ng h\u1ea1 \u00e2m (d\u01b0\u1edbi 20Hz), si\u00eau \u00e2m (tr\u00ean 20kHz) ho\u1eb7c \u00e2m thanh nghe \u0111\u01b0\u1ee3c (20Hz &#8211; 20kHz) nh\u01b0ng \u1edf m\u1ee9c c\u01b0\u1eddng \u0111\u1ed9 r\u1ea5t l\u1edbn.<\/p>\n<h3>C\u00e1c lo\u1ea1i v\u0169 kh\u00ed \u00e2m thanh<\/h3>\n<p>C\u00f3 nhi\u1ec1u lo\u1ea1i v\u0169 kh\u00ed \u00e2m thanh kh\u00e1c nhau, d\u1ef1a tr\u00ean t\u1ea7n s\u1ed1 v\u00e0 ph\u01b0\u01a1ng th\u1ee9c ph\u00e1t s\u00f3ng:<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Lo\u1ea1i V\u0169 Kh\u00ed<\/th>\n<th>T\u1ea7n S\u1ed1<\/th>\n<th>T\u00e1c D\u1ee5ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>H\u1ea1 \u00e2m (Infrasonic)<\/td>\n<td>D\u01b0\u1edbi 20Hz<\/td>\n<td>G\u00e2y bu\u1ed3n n\u00f4n, ch\u00f3ng m\u1eb7t, m\u1ea5t ph\u01b0\u01a1ng h\u01b0\u1edbng, th\u1eadm ch\u00ed t\u1ed5n th\u01b0\u01a1ng n\u1ed9i t\u1ea1ng \u1edf c\u01b0\u1eddng \u0111\u1ed9 c\u1ef1c cao<\/td>\n<\/tr>\n<tr>\n<td>Si\u00eau \u00e2m (Ultrasonic)<\/td>\n<td>Tr\u00ean 20kHz<\/td>\n<td>G\u00e2y kh\u00f3 ch\u1ecbu, \u0111au \u0111\u1ea7u, \u00f9 tai, c\u00f3 th\u1ec3 g\u00e2y t\u1ed5n th\u01b0\u01a1ng m\u00f4 \u1edf c\u01b0\u1eddng \u0111\u1ed9 r\u1ea5t cao<\/td>\n<\/tr>\n<tr>\n<td>\u00c2m thanh nghe \u0111\u01b0\u1ee3c (Sonic)<\/td>\n<td>20Hz &#8211; 20kHz<\/td>\n<td>G\u00e2y \u0111au tai, m\u1ea5t th\u00ednh l\u1ef1c t\u1ea1m th\u1eddi ho\u1eb7c v\u0129nh vi\u1ec5n, r\u1ed1i lo\u1ea1n t\u00e2m l\u00fd<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>C\u00e1c th\u00e0nh ph\u1ea7n c\u01a1 b\u1ea3n<\/h3>\n<p>\u0110\u1ec3 ch\u1ebf t\u1ea1o m\u1ed9t v\u0169 kh\u00ed \u00e2m thanh, c\u1ea7n c\u00f3 c\u00e1c th\u00e0nh ph\u1ea7n sau:<\/p>\n<ul>\n<li><strong>B\u1ed9 ph\u1eadn ph\u00e1t s\u00f3ng:<\/strong> \u0110\u00e2y l\u00e0 th\u00e0nh ph\u1ea7n quan tr\u1ecdng nh\u1ea5t, ch\u1ecbu tr\u00e1ch nhi\u1ec7m t\u1ea1o ra s\u00f3ng \u00e2m \u1edf t\u1ea7n s\u1ed1 v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 mong mu\u1ed1n. C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng loa, c\u00f2i, ho\u1eb7c c\u00e1c thi\u1ebft b\u1ecb t\u1ea1o s\u00f3ng si\u00eau \u00e2m.<\/li>\n<li><strong>B\u1ed9 khu\u1ebfch \u0111\u1ea1i:<\/strong>  Khu\u1ebfch \u0111\u1ea1i t\u00edn hi\u1ec7u \u00e2m thanh \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u01b0\u1eddng \u0111\u1ed9 c\u1ea7n thi\u1ebft.<\/li>\n<li><strong>Ngu\u1ed3n \u0111i\u1ec7n:<\/strong> Cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng cho to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng.<\/li>\n<li><strong>B\u1ed9 \u0111i\u1ec1u khi\u1ec3n:<\/strong>  \u0110i\u1ec1u ch\u1ec9nh t\u1ea7n s\u1ed1 v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a s\u00f3ng \u00e2m.<\/li>\n<\/ul>\n<h3>Ch\u1ebf t\u1ea1o m\u1ed9t thi\u1ebft b\u1ecb ph\u00e1t s\u00f3ng si\u00eau \u00e2m \u0111\u01a1n gi\u1ea3n<\/h3>\n<p>M\u1ed9t v\u00ed d\u1ee5 \u0111\u01a1n gi\u1ea3n v\u1ec1 thi\u1ebft b\u1ecb ph\u00e1t s\u00f3ng si\u00eau \u00e2m l\u00e0 s\u1eed d\u1ee5ng b\u1ed9 chuy\u1ec3n \u0111\u1ed5i si\u00eau \u00e2m. Tuy nhi\u00ean, vi\u1ec7c t\u1ea1o ra m\u1ed9t v\u0169 kh\u00ed si\u00eau \u00e2m hi\u1ec7u qu\u1ea3 \u0111\u00f2i h\u1ecfi ki\u1ebfn th\u1ee9c chuy\u00ean s\u00e2u v\u00e0 thi\u1ebft b\u1ecb ph\u1ee9c t\u1ea1p.  Vi\u1ec7c t\u1ef1 ch\u1ebf t\u1ea1o c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn hi\u1ec7u qu\u1ea3 th\u1ea5p ho\u1eb7c g\u00e2y nguy hi\u1ec3m.<\/p>\n<h3>L\u01b0u \u00fd v\u1ec1 t\u00ednh an to\u00e0n v\u00e0 ph\u00e1p l\u00fd<\/h3>\n<p>Vi\u1ec7c ch\u1ebf t\u1ea1o v\u00e0 s\u1eed d\u1ee5ng v\u0169 kh\u00ed \u00e2m thanh l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 nh\u1ea1y c\u1ea3m v\u00e0 c\u00f3 th\u1ec3 g\u00e2y ra h\u1eadu qu\u1ea3 nghi\u00eam tr\u1ecdng.  Ph\u1ea7n l\u1edbn c\u00e1c qu\u1ed1c gia \u0111\u1ec1u c\u00f3 lu\u1eadt l\u1ec7 nghi\u00eam c\u1ea5m vi\u1ec7c s\u1ea3n xu\u1ea5t v\u00e0 s\u1eed d\u1ee5ng v\u0169 kh\u00ed \u00e2m thanh.  Vi\u1ec7c s\u1eed d\u1ee5ng sai m\u1ee5c \u0111\u00edch c\u00f3 th\u1ec3 g\u00e2y t\u1ed5n h\u1ea1i \u0111\u1ebfn s\u1ee9c kh\u1ecfe con ng\u01b0\u1eddi v\u00e0 vi ph\u1ea1m ph\u00e1p lu\u1eadt.<\/p>\n<p>T\u00f3m l\u1ea1i, vi\u1ec7c ch\u1ebf t\u1ea1o v\u0169 kh\u00ed \u00e2m thanh l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh ph\u1ee9c t\u1ea1p, \u0111\u00f2i h\u1ecfi ki\u1ebfn th\u1ee9c chuy\u00ean m\u00f4n v\u00e0 thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng. B\u00e0i vi\u1ebft n\u00e0y ch\u1ec9 mang t\u00ednh ch\u1ea5t cung c\u1ea5p th\u00f4ng tin c\u01a1 b\u1ea3n v\u1ec1 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n c\u1ea5u t\u1ea1o.  Tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng khuy\u1ebfn kh\u00edch vi\u1ec7c ch\u1ebf t\u1ea1o v\u00e0 s\u1eed d\u1ee5ng v\u0169 kh\u00ed \u00e2m thanh v\u00ec m\u1ee5c \u0111\u00edch b\u1ea5t h\u1ee3p ph\u00e1p ho\u1eb7c g\u00e2y h\u1ea1i.  H\u00e3y lu\u00f4n tu\u00e2n th\u1ee7 ph\u00e1p lu\u1eadt v\u00e0 \u0111\u1eb7t s\u1ef1 an to\u00e0n l\u00ean h\u00e0ng \u0111\u1ea7u.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00c2m thanh, ngo\u00e0i vi\u1ec7c mang l\u1ea1i nh\u1eefng giai \u0111i\u1ec7u \u00eam tai, c\u00f2n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 m\u1ed9t c\u00f4ng c\u1ee5, th\u1eadm ch\u00ed l\u00e0 v\u0169 kh\u00ed. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o kh\u00eda c\u1ea1nh \u00edt \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn n\u00e0y: c\u00e1ch ch\u1ebf t\u1ea1o m\u1ed9t v\u0169 kh\u00ed \u00e2m thanh. Xin l\u01b0u \u00fd r\u1eb1ng vi\u1ec7c ch\u1ebf t\u1ea1o<\/p>\n","protected":false},"author":1,"featured_media":1589,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-48852","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\/48852","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=48852"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/48852\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/1589"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=48852"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=48852"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=48852"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}