M\u00e1y t\u1ea1o \u1ea9m si\u00eau \u00e2m \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t thi\u1ebft b\u1ecb ph\u1ed5 bi\u1ebfn trong nhi\u1ec1u gia \u0111\u00ecnh, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong nh\u1eefng th\u00e1ng m\u00f9a \u0111\u00f4ng kh\u00f4 hanh ho\u1eb7c khi s\u1eed d\u1ee5ng \u0111i\u1ec1u h\u00f2a. Ch\u00fang gi\u00fap t\u0103ng \u0111\u1ed9 \u1ea9m trong kh\u00f4ng kh\u00ed, mang l\u1ea1i nhi\u1ec1u l\u1ee3i \u00edch cho s\u1ee9c kh\u1ecfe v\u00e0 s\u1ef1 tho\u1ea3i m\u00e1i. V\u1eady m\u00e1y t\u1ea1o \u1ea9m si\u00eau \u00e2m ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o? B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a lo\u1ea1i m\u00e1y n\u00e0y.<\/p>\n
M\u00e1y t\u1ea1o \u1ea9m si\u00eau \u00e2m s\u1eed d\u1ee5ng nguy\u00ean l\u00fd dao \u0111\u1ed9ng si\u00eau \u00e2m \u0111\u1ec3 bi\u1ebfn n\u01b0\u1edbc th\u00e0nh s\u01b0\u01a1ng m\u00f9. Thay v\u00ec \u0111un s\u00f4i n\u01b0\u1edbc nh\u01b0 m\u00e1y t\u1ea1o \u1ea9m truy\u1ec1n th\u1ed1ng, m\u00e1y t\u1ea1o \u1ea9m si\u00eau \u00e2m s\u1eed d\u1ee5ng m\u1ed9t t\u1ea5m g\u1ed1m \u00e1p \u0111i\u1ec7n. T\u1ea5m g\u1ed1m n\u00e0y rung \u0111\u1ed9ng \u1edf t\u1ea7n s\u1ed1 si\u00eau \u00e2m, t\u1ea1o ra c\u00e1c s\u00f3ng \u00e2m thanh t\u1ea7n s\u1ed1 cao m\u00e0 tai ng\u01b0\u1eddi kh\u00f4ng th\u1ec3 nghe th\u1ea5y.<\/p>\n
T\u1ea5m g\u1ed1m \u00e1p \u0111i\u1ec7n l\u00e0 th\u00e0nh ph\u1ea7n c\u1ed1t l\u00f5i c\u1ee7a m\u00e1y t\u1ea1o \u1ea9m si\u00eau \u00e2m. Khi \u0111\u01b0\u1ee3c \u00e1p m\u1ed9t \u0111i\u1ec7n \u00e1p, t\u1ea5m g\u1ed1m n\u00e0y s\u1ebd dao \u0111\u1ed9ng \u1edf t\u1ea7n s\u1ed1 r\u1ea5t cao, th\u01b0\u1eddng l\u00e0 t\u1eeb 1.7MHz \u0111\u1ebfn 2.5MHz. Ch\u00ednh s\u1ef1 dao \u0111\u1ed9ng n\u00e0y t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m.<\/p>\n
S\u00f3ng si\u00eau \u00e2m \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb t\u1ea5m g\u1ed1m \u00e1p \u0111i\u1ec7n t\u00e1c \u0111\u1ed9ng l\u00ean b\u1ec1 m\u1eb7t n\u01b0\u1edbc, t\u1ea1o ra \u00e1p su\u1ea5t cao v\u00e0 th\u1ea5p xen k\u1ebd. \u00c1p su\u1ea5t th\u1ea5p t\u1ea1o ra c\u00e1c bong b\u00f3ng kh\u00ed nh\u1ecf li ti trong n\u01b0\u1edbc, m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng g\u1ecdi l\u00e0 cavitation. C\u00e1c bong b\u00f3ng n\u00e0y v\u1ee1 ra tr\u00ean b\u1ec1 m\u1eb7t n\u01b0\u1edbc, gi\u1ea3i ph\u00f3ng c\u00e1c h\u1ea1t n\u01b0\u1edbc c\u1ef1c nh\u1ecf v\u00e0o kh\u00f4ng kh\u00ed d\u01b0\u1edbi d\u1ea1ng s\u01b0\u01a1ng m\u00f9.<\/p>\n
| \u01afu \u0111i\u1ec3m<\/th>\n | M\u00f4 t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n | ||||||
|---|---|---|---|---|---|---|---|
| Ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng<\/td>\n | M\u00e1y t\u1ea1o \u1ea9m si\u00eau \u00e2m ti\u00eau th\u1ee5 \u00edt n\u0103ng l\u01b0\u1ee3ng h\u01a1n so v\u1edbi m\u00e1y t\u1ea1o \u1ea9m \u0111un s\u00f4i.<\/td>\n<\/tr>\n | ||||||
| Ho\u1ea1t \u0111\u1ed9ng \u00eam \u00e1i<\/td>\n | Do kh\u00f4ng s\u1eed d\u1ee5ng qu\u1ea1t ho\u1eb7c b\u1ed9 ph\u1eadn chuy\u1ec3n \u0111\u1ed9ng m\u1ea1nh, m\u00e1y t\u1ea1o \u1ea9m si\u00eau \u00e2m ho\u1ea1t \u0111\u1ed9ng r\u1ea5t \u00eam \u00e1i.<\/td>\n<\/tr>\n | ||||||
| An to\u00e0n<\/td>\n | Do kh\u00f4ng \u0111un s\u00f4i n\u01b0\u1edbc, m\u00e1y t\u1ea1o \u1ea9m si\u00eau \u00e2m an to\u00e0n h\u01a1n, \u0111\u1eb7c bi\u1ec7t l\u00e0 v\u1edbi gia \u0111\u00ecnh c\u00f3 tr\u1ebb nh\u1ecf.<\/td>\n<\/tr>\n | ||||||
| K\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn<\/td>\n | M\u00e1y t\u1ea1o \u1ea9m si\u00eau \u00e2m th\u01b0\u1eddng c\u00f3 thi\u1ebft k\u1ebf nh\u1ecf g\u1ecdn, ti\u1ebft ki\u1ec7m kh\u00f4ng gian.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\nNh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a m\u00e1y t\u1ea1o \u1ea9m si\u00eau \u00e2m<\/h3>\n
|