Ng\u00e0y 12 th\u00e1ng 12 n\u0103m 2010 Ban ch\u1ee7 nhi\u1ec7m CLB \u1ee8ng d\u1ee5ng Ti\u1ec1m n\u0103ng Con ng\u01b0\u1eddi TPHCM\u00a0 \u0111\u00e3 t\u1ed5 ch\u1ee9c \u201ccu\u1ed9c thi t\u00ecm hi\u1ec3u ti\u1ec1m n\u0103ng con ng\u01b0\u1eddi\u201d mang t\u00ean \u201cM\u00e1i Hi\u00ean Nh\u00e0 T\u00f4i\u201d. Ba \u0111\u1ed9i chung s\u1ee9c d\u01b0\u1edbi c\u00e1c t\u00ean \u201cH\u01b0\u01a1ng Th\u1ea7m\u201d, \u201cTre Ng\u00e0\u201d v\u00e0 \u201cHoa S\u1eefa\u201d \u0111\u00e3 chia s\u1ebb nh\u1eefng \u00fd ki\u1ebfn c\u1ee7a m\u00ecnh v\u1ec1 nh\u1eadn th\u1ee9c v\u00e0 tr\u1ea3i nghi\u1ec7m t\u00e2m linh.\u00a0 Ban t\u1ed5 ch\u1ee9c xin g\u1eedi \u0111\u1ebfn c\u00e1c b\u1ea1n \u0111\u00e1p \u00e1n c\u1ee7a cu\u1ed9c thi t\u00ecm hi\u1ec3u v\u1ec1 ti\u1ec1m n\u0103ng con ng\u01b0\u1eddi (TNCN) \u0111\u1ec3 tham kh\u1ea3o, n\u1ebfu c\u00f3 s\u01a1 s\u00f3t ho\u1eb7c \u00fd ki\u1ebfn kh\u00f4ng \u0111\u1ed3ng mong \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng th\u1ee9.<\/i><\/p>\n
H\u1ecfi: \u201cHi\u1ec7n nay ph\u1ea7n \u0111\u00f4ng c\u1ed9ng \u0111\u1ed3ng \u0111\u1ec1u hi\u1ec3u bi\u1ebft ch\u1ed7 \u1edf h\u1ea1p tu\u1ed5i \/ h\u1ea1p h\u01b0\u1edbng kh\u00f4ng l\u00e0 ch\u01b0a \u0111\u1ee7 v\u00ec c\u00f2n nhi\u1ec1u y\u1ebfu t\u1ed1 kh\u00e1c li\u00ean quan \u0111\u1ebfn m\u00f4i tr\u01b0\u1eddng, \u0111\u1ebfn \u0111i\u1ec7n t\u1eeb tr\u01b0\u1eddng, v.v\u2026 B\u1ea1n h\u00e3y k\u1ec3 nh\u1eefng t\u00e1c nh\u00e2n \u0110SH c\u00f3 th\u1ec3 l\u00e0m h\u1ea1i \u0111\u1ebfn cu\u1ed9c s\u1ed1ng c\u1ee7a ta.\u201d<\/b><\/p>\n
\u0110\u00e1p \u00e1n tham kh\u1ea3o: <\/p>\n
Nh\u1eefng b\u1ee9c x\u1ea1 \u0111\u1ed9c h\u1ea1i c\u00f3 th\u1ec3 ph\u00e2n l\u00e0m c\u00e1c lo\u1ea1i nh\u01b0 sau:
1. B\u1ee9c x\u1ea1 c\u00f3 ngu\u1ed3n g\u1ed1c t\u1ef1 nhi\u00ean :
\u0110\u00f3 l\u00e0 c\u00e1c m\u1ea1ch, c\u00e1c d\u1ea1ng n\u01b0\u1edbc ng\u1ea7m d\u01b0\u1edbi \u0111\u1ea5t, c\u00e1c, c\u00e1c \u0111\u1ea7m l\u1ea7y \u1ee9 \u0111\u1ecdng, c\u00e1c phay kh\u00f4 hay \u1ea9m \u01b0\u1edbt, c\u00e1c hang \u0111\u1ed9ng d\u01b0\u1edbi \u0111\u1ea5t , c\u00e1c kho\u00e1ng v\u1eadt ph\u00f3ng x\u1ea1, v.v\u2026
2. B\u1ee9c x\u1ea1 do con ng\u01b0\u1eddi t\u1ea1o ra:
\u2022\u00a0\u00a0 \u00a0R\u1ea5t nguy hi\u1ec3m l\u00e0 \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n cao th\u1ebf, c\u00e1c tr\u1ea1m bi\u1ebfn \u0111i\u1ec7n, c\u00e1c tr\u1ea1m ti\u1ebfp s\u00f3ng \u0111i\u1ec7n tho\u1ea1i di \u0111\u1ed9ng, c\u00e1c tr\u1ea1m radar, c\u00e1c \u0111\u00e0i ph\u00e1t s\u00f3ng TV, v.v\u2026
\u2022\u00a0\u00a0 \u00a0\u0110\u1eb7c bi\u1ec7t \u00edt ai \u0111\u1ec3 \u00fd \u0111\u1ebfn l\u00e0 m\u1ea1ng l\u01b0\u1edbi \u0111i\u1ec7n d\u00f9ng trong nh\u00e0, d\u00e2y \u0111i\u1ec7n ch\u1ea1y ch\u1eb1ng ch\u1ecbt quanh ch\u1ed7 ng\u1ee7, v\u00e0 nguy hi\u1ec3m nh\u1ea5t l\u00e0 d\u00f9ng l\u00f2 vi ba, t\u00e1c nh\u00e2n c\u1ee7a b\u1ec7nh ung th\u01b0, \u0111i\u1ec7n tho\u1ea1i di \u0111\u1ed9ng \u2026\u00a0
\u2022\u00a0\u00a0 \u00a0C\u00e1c \u0111\u01b0\u1eddng h\u1ea7m ng\u1ea7m, c\u00e1c c\u00f4ng tr\u01b0\u1eddng khai th\u00e1c \u0111\u00e1 c\u0169, c\u00e1c n\u01a1i d\u00f9ng l\u00e0m l\u00f2 s\u00e1t sinh, c\u00e1c \u0111\u01b0\u1eddng c\u1ed1ng c\u0169, c\u00e1c m\u1ed3 huy\u1ec7t, c\u00e1c h\u1ea7m ch\u1ee9a b\u1ecb b\u1ecf r\u01a1i, c\u00e1c n\u01a1i ch\u00f4n r\u00e1c, c\u00e1c \u1ed1ng v\u00e0 h\u1ec7 th\u1ed1ng d\u1eabn ng\u1ea7m\u2026
3. B\u1ee9c x\u1ea1 t\u1eeb k\u00fd \u1ee9c \u00e2m t\u00ednh :\u00a0\u00a0
\u2022\u00a0\u00a0 \u00a0N\u01a1i \u1edf m\u00e0 tr\u01b0\u1edbc \u0111\u00e2y t\u1ea1i n\u01a1i n\u00e0y \u0111\u00e3 x\u1ea3y ra chi\u1ebfn tr\u1eadn hay nh\u1eefng h\u00e0nh vi ph\u1ea1m t\u1ed9i nh\u01b0 g\u00e2y \u00e1n m\u1ea1ng\u2026),
\u2022\u00a0\u00a0 \u00a0Nh\u1eefng ngh\u0129a trang \u0111\u01b0\u1ee3c gi\u1ea3i t\u1ecfa \u0111\u1ec3 l\u00e0m n\u01a1i x\u00e2y c\u1ea5t c\u01a1 quan, c\u01b0 x\u00e1, cao \u1ed1c, v.v\u2026
\u2022\u00a0\u00a0 \u00a0B\u1ec7nh vi\u1ec7n, ph\u00f2ng m\u1ea1ch \u0111\u00f4ng t\u00e2y y, ph\u00f2ng gi\u1ea3i ph\u1ea9u th\u1eabm m\u1ef9,
\u2022\u00a0\u00a0 \u00a0Ph\u00f2ng t\u1eadp th\u1ec3 d\u1ee5c th\u1ec3 thao,
\u2022\u00a0\u00a0 \u00a0Ph\u00f2ng h\u1ecdp \u0111\u00f4ng ng\u01b0\u1eddi,
\u2022\u00a0\u00a0 \u00a0C\u00e1c s\u00f3ng h\u00ecnh d\u1ea1ng \u00e2m t\u00ednh t\u1eeb n\u01a1i \u1edf v\u00e0 chung quanh n\u01a1i \u1edf,
\u2022\u00a0\u00a0 \u00a0Ch\u1ee7 \u1edf tr\u01b0\u1edbc \u0111au b\u1ec7nh ng\u1eb7t ngh\u00e8o v\u00e0 qua \u0111\u1eddi,
\u2022\u00a0\u00a0 \u00a0Tr\u01b0\u1edbc \u0111\u00e2y l\u00e0 n\u01a1i v\u1eadn h\u00e0nh, x\u1eed l\u00fd th\u00f4ng tin v\u00e0 \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng h\u1ec7 th\u1ed1ng v\u00e0 nhi\u1ec1u m\u00e1y m\u00f3c \u0111i\u1ec7n t\u1eed\u2026
(Nguy\u1ec5n Minh Tr\u00ed)<\/p>\n
H\u1ecfi: \u201cTh\u1eddi \u0111\u1ea1i ng\u00e0y nay, \u0111\u1ec3 an c\u01b0 l\u1ea1c nghi\u1ec7p, khi x\u00e2y d\u1ef1ng nh\u00e0 \u1edf, ng\u01b0\u1eddi ta d\u00f9ng ph\u01b0\u01a1ng ph\u00e1p ki\u1ebfn tr\u00fac y h\u1ecdc. V\u1eady t\u1eeb ng\u1eef n\u00e0y bao h\u00e0m n\u1ed9i dung g\u00ec v\u00e0 ti\u1ebfn h\u00e0nh ra sao?\u201d \u00a0<\/b><\/p>\n
\u0110\u00e1p \u00e1n tham kh\u1ea3o<\/p>\n
Ki\u1ebfn tr\u00fac y h\u1ecdc c\u00f3 ngh\u0129a l\u00e0 x\u00e2y d\u1ef1ng c\u00f4ng tr\u00ecnh v\u1eeba ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u (ki\u1ebfn tr\u00fac theo nhu c\u1ea7u ng\u01b0\u1eddi \u1edf), v\u1eeba h\u00e0i h\u00f2a v\u1edbi thi\u00ean nhi\u00ean, c\u00f3 tr\u01b0\u1eddng kh\u00ed t\u1ed1t, ng\u01b0\u1eddi \u1edf kh\u00f4ng b\u1ec7nh t\u1eadt, c\u00f3 s\u1ee9c kh\u1ecfe t\u1ed1t (ph\u00f9 h\u1ee3p v\u1edbi y h\u1ecdc), nh\u1eefng ng\u01b0\u1eddi c\u00f9ng c\u01b0 ng\u1ee5 kh\u00f4ng xung kh\u1eafc nhau (k\u1ec3 c\u1ea3 \u201ckh\u1eafc kh\u1ea9u), l\u1ea1i g\u1eafn b\u00f3 nhau, th\u01b0\u01a1ng y\u00eau, gi\u00fap \u0111\u1ee1 nhau. M\u1ecdi ng\u01b0\u1eddi \u0111\u1ec1u \u201cAN C\u01af\u201d v\u00e0 t\u1eeb \u0111\u00f3 \u201c\u0103n n\u00ean l\u00e0m ra\u201d \u0111\u1ec3 \u201cL\u1ea0C NGHI\u1ec6P\u201d.
Qui tr\u00ecnh r\u1ea5t \u0111\u01a1n gi\u1ea3n n\u00ean \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh nh\u01b0 sau:
1.\u00a0\u00a0\u00a0 Kh\u1ea3o s\u00e1t \u0111\u1ecba sinh cu\u1ed9c \u0111\u1ea5t tr\u1ed1ng ho\u1eb7c nh\u00e0 c\u0169 \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c lo\u1ea1i b\u1ee9c x\u1ea1 \u0111\u1ed9c h\u1ea1i n\u1ebfu c\u00f3 v\u00e0 \u0111\u1ec1 ra c\u00e1ch x\u1eed l\u00fd .
2.\u00a0\u00a0\u00a0 K\u1ebft h\u1ee3p m\u1ee5c ti\u00eau x\u00e2y d\u1ef1ng v\u00e0 k\u1ebft qu\u1ea3 kh\u1ea3o s\u00e1t \u0111\u1ecba sinh \u0111\u1ec3 l\u00ean b\u1ea3ng v\u1ebd ki\u1ebfn tr\u00fac n\u1ed9i, ngo\u1ea1i th\u1ea5t sao cho h\u00e0i h\u00f2a.
3.\u00a0\u00a0\u00a0 Sau khi l\u00ean b\u1ea3ng v\u1ebd ki\u1ebfn tr\u00fac xong n\u00ean s\u01a1 b\u1ed9 \u0111o \u0111\u1ea1c ch\u1ec9 s\u1ed1 Bovis v\u00e0 \u0111i\u1ec1u ch\u1ec9nh n\u1ebfu c\u1ea7n \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee9c t\u1ed1i \u01b0u, \u0111o \u0111\u1ea1c l\u1ea1i v\u00e0 sau \u0111\u00f3 l\u00e0 ph\u1ea7n thi c\u00f4ng.
(Nguy\u1ec5n Minh Tr\u00ed)<\/p>\n
H\u1ecfi: \u201cB\u1ea1n hi\u1ec3u th\u1ef1c h\u00e0nh c\u1ea3m x\u1ea1 nh\u01b0 th\u1ebf n\u00e0o? M\u1ee5c \u0111\u00edch (ph\u1ea1m vi \u1ee9ng d\u1ee5ng) \u1ee9ng d\u1ee5ng c\u1ea3m x\u1ea1 h\u1ecdc nh\u1eb1m v\u00e0o c\u00e1c l\u0129nh v\u1ef1c n\u00e0o trong \u0111\u1eddi s\u1ed1ng con ng\u01b0\u1eddi ?\u201d<\/b><\/p>\n
\u0110\u00e1p \u00e1n tham kh\u1ea3o: <\/p>\n
\u2022\u00a0\u00a0 \u00a0Th\u1ef1c h\u00e0nh c\u1ea3m x\u1ea1 l\u00e0 ng\u01b0\u1eddi l\u00e0m c\u1ea3m x\u1ea1 (hay c\u00f3 th\u1ec3 g\u1ecdi l\u00e0 nh\u00e0 c\u1ea3m x\u1ea1) mu\u1ed1n bi\u1ebft th\u00f4ng tin v\u1ec1 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng n\u00e0o \u0111\u00f3 th\u00ec b\u1ee9c x\u1ea1 ph\u00e1t th\u00f4ng tin \u201ch\u1ecfi\u201d \u0111\u1ebfn \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u00f3, li\u1ec1n c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c th\u00f4ng tin \u201c\u0111\u00e1p\u201d v\u1ec1 t\u00ecnh h\u00ecnh c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u00f3.
\u2022\u00a0\u00a0 \u00a0M\u1ee5c \u0111\u00edch \u1ee9ng d\u1ee5ng c\u1ea3m x\u1ea1 h\u1ecdc nh\u1eb1m v\u00e0o :
–\u00a0\u00a0 \u00a0Nh\u00e0 c\u1ea3m x\u1ea1 th\u1ef1c h\u00e0nh c\u1ea3m x\u1ea1 c\u00f3 th\u1ec3 \u201ch\u1ecfi\u201d b\u1ea1n m\u00ecnh c\u00f3 kh\u1ecfe kh\u00f4ng? N\u1ebfu kh\u00f4ng kh\u1ecfe th\u00ec \u0111ang m\u1eafc b\u1ec7nh g\u00ec, b\u1ec7nh n\u1eb7ng hay nh\u1eb9, n\u00ean tr\u1ecb b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p y h\u1ecdc n\u00e0o, li\u1ec7u b\u1ec7nh c\u00f3 kh\u1ecfi kh\u00f4ng, bao l\u00e2u th\u00ec kh\u1ecfi, \u2026 ? M\u1ed7i c\u00e2u h\u1ecfi \u0111\u1ec1u \u0111\u01b0\u1ee3c \u201c\u0111\u00e1p\u201d kh\u00e1 r\u00f5.
–\u00a0\u00a0 \u00a0T\u00ecm ngu\u1ed3n n\u01b0\u1edbc d\u01b0\u1edbi \u0111\u1ea5t (n\u01b0\u1edbc ng\u1ea7m): v\u00f9ng n\u00e0y c\u00f3 th\u1ec3 khoan v\u00e0 khai th\u00e1c n\u01b0\u1edbc s\u1ea1ch d\u01b0\u1edbi \u0111\u1ea5t (th\u01b0\u1eddng g\u1ecdi l\u00e0 n\u01b0\u1edbc ng\u1ea7m) hay kh\u00f4ng, l\u01b0u l\u01b0\u1ee3ng bao nhi\u00eau, tr\u1eef l\u01b0\u1ee3ng bao nhi\u00eau, \u2026 ?
–\u00a0\u00a0 \u00a0T\u00ecm ngu\u1ed3n t\u00e0i nguy\u00ean kho\u00e1ng s\u1ea3n,
–\u00a0\u00a0 \u00a0Ch\u1ecdn l\u1ef1a nhu\u00a0 y\u1ebfu ph\u1ea9m, h\u00e0ng h\u00f3a,
–\u00a0\u00a0 \u00a0Kh\u1ea3o s\u00e1t phong th\u1ee7y, \u0111\u1ecba sinh h\u1ecdc, \u2026 ,
–\u00a0\u00a0 \u00a0T\u00ecm ng\u01b0\u1eddi \u0111i l\u1ea1c, c\u1ee7a c\u1ea3i, \u0111\u1ed3 v\u1eadt b\u1ecb th\u1ea5t l\u1ea1c,
–\u00a0\u00a0 \u00a0Nh\u1eadn x\u00e9t th\u00e2n nh\u00e2n, b\u1ea1n b\u00e8, \u0111\u1ed1i t\u01b0\u1ee3ng quan h\u1ec7 giao d\u1ecbch, – v.v.
(Hu\u1ef3nh B\u1eedu H\u00f2a)<\/p>\n
H\u1ecfi : \u201cV\u00ec sao c\u00e1c nh\u00e0 ngo\u1ea1i c\u1ea3m nghe v\u00e0 th\u1ea5y \u0111\u01b0\u1ee3c vong?\u201d<\/b><\/p>\n
\u0110\u00e1p \u00e1n tham kh\u1ea3o: <\/p>\n
Nh\u1eefng nh\u00e0 ngo\u1ea1i c\u1ea3m l\u00e0 nh\u1eefng ng\u01b0\u1eddi c\u00f3 kh\u1ea3 n\u0103ng \u0111\u1eb7c bi\u1ec7t do b\u1ea9m sinh, do tai n\u1ea1n nh\u01b0 s\u00e9t \u0111\u00e1nh, ch\u00f3 d\u1ea1i c\u1eafn… v\u00e0 nh\u1eefng ng\u01b0\u1eddi do luy\u1ec7n t\u1eadp. H\u1ecd nghe v\u00e0 th\u1ea5y \u0111\u01b0\u1ee3c nh\u1eefng vi\u1ec7c m\u00e0 ch\u00fang ta ng\u01b0\u1eddi b\u00ecnh th\u01b0\u1eddng kh\u00f4ng th\u1ec3 nghe v\u00e0 th\u1ea5y \u0111\u01b0\u1ee3c. T\u1ea1i sao ?
Qua nghi\u00ean c\u1ee9u c\u00e1c nh\u00e0 khoa h\u1ecdc th\u1ea5y m\u1eaft ng\u01b0\u1eddi b\u00ecnh th\u01b0\u1eddng ch\u1ec9 nh\u00ecn th\u1ea5y v\u00f9ng \u00e1nh s\u00e1ng c\u00f3 t\u1ea7n s\u1ed1 s\u00f3ng t\u1eeb 0.30 micromet\u00f7 0.76 micromet (lamda). C\u00f2n nh\u1eefng ng\u01b0\u1eddi ngo\u1ea1i c\u1ea3m h\u1ecd c\u00f3 th\u1ec3 th\u1ea5y v\u00f9ng nh\u1ecf h\u01a1n 0.39 micromet (lamda) r\u1ea5t nhi\u1ec1u, c\u00f3 th\u1ec3 g\u1ea7n b\u1eb1ng kh\u00f4ng (\u03bb \u2248 0).
C\u0169ng nh\u01b0 v\u1eady ng\u01b0\u1eddi c\u00f3 tai th\u00ednh nh\u1ea5t ch\u1ec9 nghe \u0111\u01b0\u1ee3c nh\u1eefng \u00e2m c\u00f3 t\u1ea7n s\u1ed1 trong kho\u1ea3ng 1000 – 2500 Hz. Nh\u1eefng \u00e2m thanh c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 qu\u00e1 nh\u1ecf th\u00ec tai ng\u01b0\u1eddi kh\u00f4ng nh\u1eadn th\u1ea5y \u0111\u01b0\u1ee3c \u2013 nghe \u0111\u01b0\u1ee3c. Nh\u1eefng \u00e2m thanh c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 l\u00ean qu\u00e1 cao th\u00ec tai b\u1eaft \u0111\u1ea7u ch\u00f3i kh\u00f4ng nghe \u0111\u01b0\u1ee3c. Nh\u01b0ng qua nghi\u00ean c\u1ee9u, c\u00e1c nh\u00e0 khoa h\u1ecdc th\u1ea5y ng\u01b0\u1eddi ngo\u1ea1i c\u1ea3m h\u1ecd c\u00f3 th\u1ec3 nghe \u0111\u01b0\u1ee3c \u00e2m thanh c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 r\u1ea5t nh\u1ecf d\u01b0\u1edbi 16 Hz nh\u01b0 Phan Th\u1ecb B\u00edch H\u1eb1ng…
(Ph\u1ea1m V\u0103n Ph\u00fa)<\/p>\n
H\u1ecfi: \u201cC\u1ea3m x\u1ea1 h\u1ecdc l\u00e0 m\u1ed9t m\u00f4n khoa h\u1ecdc v\u1eadt l\u00fd \u1ee9ng d\u1ee5ng s\u00f3ng sinh h\u1ecdc l\u01b0\u1ee3ng t\u1eed mang th\u00f4ng tin. B\u1ea1n c\u00f3 th\u1ec3 di\u1ec5n gi\u1ea3i t\u00f3m t\u1eaft v\u1ec1 c\u01a1 s\u1edf l\u00fd thuy\u1ebft r\u1eb1ng t\u1ea1i sao nh\u00e0 c\u1ea3m x\u1ea1 c\u00f3 th\u1ec3 c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c th\u00f4ng tin v\u1ec1 qu\u00e1 kh\u1ee9, hi\u1ec7n tr\u1ea1ng v\u00e0 t\u01b0\u01a1ng lai c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ea3m x\u1ea1?\u201d<\/b><\/p>\n
\u0110\u00e1p \u00e1n tham kh\u1ea3o:<\/p>\n
\u2022\u00a0\u00a0 \u00a0C\u1ea3m x\u1ea1 h\u1ecdc l\u00e0 m\u1ed9t m\u00f4n khoa h\u1ecdc v\u1eadt l\u00fd \u1ee9ng d\u1ee5ng s\u00f3ng sinh h\u1ecdc l\u01b0\u1ee3ng t\u1eed mang th\u00f4ng tin \u0111\u1ec3 kh\u1ea3o s\u00e1t v\u00e0 thu th\u1eadp th\u00f4ng tin v\u1ec1 qu\u00e1 kh\u1ee9, hi\u1ec7n tr\u1ea1ng v\u00e0 t\u01b0\u01a1ng lai c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng m\u00e0 nh\u00e0 c\u1ea3m x\u1ea1 quan t\u00e2m.
\u2022\u00a0\u00a0 \u00a0M\u1ed7i con ng\u01b0\u1eddi, m\u1ed7i sinh v\u1eadt, m\u1ed7i v\u1eadt th\u1ec3 kh\u00f4ng ng\u1eebng ho\u1ea1t \u0111\u1ed9ng, ph\u00e1t sinh, t\u1ed3n t\u1ea1i, ph\u00e1t tri\u1ec3n v\u00e0 chuy\u1ec3n h\u00f3a theo nh\u1eefng quy lu\u1eadt ri\u00eang v\u00e0 chung nh\u1ea5t \u0111\u1ecbnh. Trong qu\u00e1 tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng ng\u1eebng \u1ea5y, ch\u00fang kh\u00f4ng ng\u1eebng b\u1ee9c x\u1ea1 c\u00e1c tia s\u00f3ng h\u00ecnh sin mang n\u0103ng l\u01b0\u1ee3ng l\u01b0\u1ee3ng t\u1eed v\u00e0 s\u00f3ng l\u01b0\u1ee3ng t\u1eed mang th\u00f4ng tin lan t\u1ecfa v\u00e0o m\u1ecdi ph\u00eda kh\u00f4ng gian v\u0169 tr\u1ee5, h\u00ecnh th\u00e0nh tr\u01b0\u1eddng c\u00e1c v\u00f2ng s\u00f3ng h\u00ecnh c\u1ea7u \u0111\u1ed3ng t\u00e2m m\u00e0 t\u00e2m l\u00e0 m\u1ed7i con ng\u01b0\u1eddi, m\u1ed7i sinh v\u1eadt, m\u1ed7i v\u1eadt th\u1ec3 \u1ea5y. Tr\u01b0\u1eddng s\u00f3ng \u1ea5y lan t\u1ecfa m\u00e3i trong kh\u00f4ng gian \u0111\u1ebfn qu\u00e3ng xa v\u00f4 c\u1ef1c. \u0110\u1ed3ng th\u1eddi, m\u1ed7i ng\u01b0\u1eddi, m\u1ed7i sinh v\u1eadt, m\u1ed7i v\u1eadt th\u1ec3 l\u1ea1i ch\u1ecbu nh\u1eadn b\u1ee9c x\u1ea1 t\u00e1c \u0111\u1ed9ng c\u1ee7a s\u00f3ng n\u0103ng l\u01b0\u1ee3ng v\u00e0 s\u00f3ng th\u00f4ng tin t\u1eeb v\u00f4 s\u1ed1 ng\u01b0\u1eddi kh\u00e1c, sinh v\u1eadt kh\u00e1c, v\u1eadt th\u1ec3 kh\u00e1c trong v\u0169 tr\u1ee5 t\u1edbi m\u00ecnh. Nh\u01b0 v\u1eady, xung quanh m\u1ed7i ng\u01b0\u1eddi, m\u1ed7i sinh v\u1eadt, m\u1ed7i v\u1eadt th\u1ec3, \u0111\u00fang ra l\u00e0 t\u1ea1i tr\u00ean b\u1ea5t k\u1ef3 c\u01a1 th\u1ec3, b\u1ed9 n\u00e3o m\u1ed7i ng\u01b0\u1eddi, tr\u00ean b\u1ea5t k\u1ef3 m\u1ed7i sinh v\u1eadt, tr\u00ean b\u1ea5t k\u1ef3 m\u1ed7i v\u1eadt th\u1ec3 th\u01b0\u1eddng xuy\u00ean hi\u1ec7n h\u1eefu v\u00f4 v\u00e0n s\u00f3ng n\u0103ng l\u01b0\u1ee3ng k\u00e8m s\u00f3ng th\u00f4ng tin l\u01b0\u1ee3ng t\u1eed t\u1eeb nh\u1eefng ng\u01b0\u1eddi kh\u00e1c, sinh vinh v\u1eadt kh\u00e1c, v\u1eadt th\u1ec3 kh\u00e1c b\u1ee9c x\u1ea1 t\u1edbi m\u00ecnh. V\u00e0 nh\u1edd v\u1eady, b\u1ea5t k\u1ef3 nh\u00e0 c\u1ea3m x\u1ea1 n\u00e0o mu\u1ed1n c\u1ea3m nh\u1eadn th\u00f4ng tin c\u1ee7a b\u1ea5t k\u1ef3 ai, hay b\u1ea5t k\u1ef3 sinh v\u1eadt n\u00e0o, ho\u1eb7c b\u1ea5t k\u1ef3 v\u1eadt th\u1ec3 n\u00e0o trong v\u0169 tr\u1ee5 n\u00e0y th\u00ec \u0111\u1ec1u c\u00f3 th\u1ec3 c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c! C\u00f2n kh\u1ea3 n\u0103ng \u0111\u00fang, sai nhi\u1ec1u, \u00edt l\u00e0 t\u00f9y t\u00e0i n\u0103ng c\u1ea3m nh\u1eadn c\u1ee7a m\u1ed7i nh\u00e0 c\u1ea3m x\u1ea1.
\u2022\u00a0\u00a0 \u00a0V\u00e0 nh\u00e0 c\u1ea3m x\u1ea1 c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c th\u00f4ng tin qu\u00e1 kh\u1ee9, hi\u1ec7n t\u1ea1i v\u00e0 t\u01b0\u01a1ng lai c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 nh\u1edd s\u1ef1 ra \u0111\u1eddi, t\u1ed3n t\u1ea1i, ph\u00e1t tri\u1ec3n, chuy\u1ec3n h\u00f3a c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ec1u theo m\u1ed9t quy lu\u1eadt nh\u1ea5t \u0111\u1ecbnh, n\u00ean th\u00f4ng tin v\u1ec1 qu\u00e1 kh\u1ee9 v\u00e0 hi\u1ec7n t\u1ea1i c\u00f2n l\u01b0u l\u1ea1i \u1ea5n t\u01b0\u1ee3ng (g\u1ecdi l\u00e0 l\u01b0u x\u1ea1) tr\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng. Nh\u00e0 c\u1ea3m x\u1ea1 c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c th\u00f4ng tin l\u01b0u x\u1ea1 n\u00e0y. R\u1ed3i c\u0169ng theo quy lu\u1eadt ph\u00e1t tri\u1ec3n, chuy\u1ec3n h\u00f3a c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng \u1ea5y m\u00e0 b\u1ee9c x\u1ea1 th\u00f4ng tin d\u1ef1 b\u00e1o nh\u00e0 c\u1ea3m x\u1ea1 c\u0169ng c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c th\u00f4ng tin t\u01b0\u01a1ng lai c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng \u1ea5y. <\/p>\n
T\u00f3m l\u1ea1i, n\u1ebfu th\u00e0nh th\u1ea1o, nh\u00e0 c\u1ea3m x\u1ea1 c\u00f3 th\u1ec3 c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c c\u00e1c th\u00f4ng tin qu\u00e1 kh\u1ee9, hi\u1ec7n t\u1ea1i v\u00e0 c\u00f3 th\u1ec3 c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c th\u00f4ng tin d\u1ef1 b\u00e1o c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng.
(Hu\u1ef3nh B\u1eedu H\u00f2a)<\/p>\n
H\u1ecfi: \u201cS\u1ef1 c\u1ea7n thi\u1ebft c\u1ee7a v\u00f4 th\u1ee9c trong qu\u00e1 tr\u00ecnh t\u1eadp luy\u1ec7n\u201d<\/b><\/p>\n
\u0110\u00e1p \u00e1n tham kh\u1ea3o <\/p>\n
N\u00e3o c\u1ee7a con ng\u01b0\u1eddi c\u00f3 th\u1ec3 ph\u00e1t ra 5 lo\u1ea1i s\u00f3ng
\u2022\u00a0\u00a0 \u00a0\u1ede tr\u1ea1ng th\u00e1i b\u00ecnh th\u01b0\u1eddng Beta c\u00f3 t\u1ea7n s\u1ed1 12-25Hz
\u2022\u00a0\u00a0 \u00a0\u1ede tr\u1ea1ng th\u00e1i nh\u1eafm m\u1eaft ho\u1eb7c ng\u1ee7 Anpha c\u00f3 t\u1ea7n s\u1ed1 8-12Hz
\u2022\u00a0\u00a0 \u00a0\u1ede tr\u1ea1ng th\u00e1i v\u00f4 th\u1ee9c Theta c\u00f3 t\u1ea7n s\u1ed1 4-8Hz Delta c\u00f3 t\u1ea7n s\u1ed1 1-4 Hz
\u2022\u00a0\u00a0 \u00a0\u1ede tr\u1ea1ng th\u00e1i v\u00f4 th\u1ee9c ho\u00e0n to\u00e0n Gama c\u00f3 t\u1ea7n s\u1ed1 < 1 Hz
Khi v\u00f4 th\u1ee9c n\u00e3o b\u1ed9 th\u01b0\u1eddng xuy\u00ean ph\u00e1t s\u00f3ng c\u00f3 t\u1ea7n s\u1ed1 th\u1ea5p, t\u1ea7n s\u1ed1 c\u00e0ng th\u1ea5p th\u00ec b\u1ee9c x\u1ea1 n\u0103ng l\u01b0\u1ee3ng d\u01b0\u1edbi d\u1ea1ng s\u00f3ng ngay c\u00e0ng m\u1ea1nh. Khi t\u1eadp v\u00f4 th\u1ee9c t\u1ee9c l\u00e0 ch\u00fang ta t\u1ea1o ra nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng cho b\u1ea3n th\u00e2n, gi\u00fap ta n\u00e2ng cao s\u1ee9c kh\u1ecfe \u0111\u1ed3ng th\u1eddi ta s\u1ebd c\u00f3 nh\u1eefng kh\u1ea3 n\u0103ng di\u1ec7u k\u1ef3 kh\u00e1c nh\u01b0 c\u00f3 kh\u1ea3 n\u0103ng ch\u1eefa b\u1ec7nh cho ng\u01b0\u1eddi kh\u00e1c b\u1eb1ng nh\u00e2n \u0111i\u1ec7n, hay l\u00e0m c\u1ea3m x\u1ea1 \u0111\u01b0\u1ee3c ch\u00ednh x\u00e1c h\u01a1n. Ta mu\u1ed1n l\u00e0m c\u1ea3m x\u1ea1 \u0111\u01b0\u1ee3c ch\u00ednh x\u00e1c th\u00ec b\u1ea3n th\u00e2n ta ph\u1ea3i c\u00f3 n\u0103ng l\u01b0\u1ee3ng cao h\u01a1n nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng ta mu\u1ed1n l\u00e0m c\u1ea3m x\u1ea1.
(Ph\u1ea1m V\u0103n Ph\u00fa)<\/p>\n
H\u1ecfi: \u201cThi\u1ec1n mang l\u1ea1i nhi\u1ec1u l\u1ee3i \u00edch\u201d<\/b><\/p>\n
\u0110\u00e1p \u00e1n tham kh\u1ea3o: <\/p>\n
\u0110\u1ecbnh ngh\u0129a thi\u1ec1n:
\u2022\u00a0\u00a0 \u00a0“Tham thi\u1ec1n l\u00e0 m\u1ed9t \u0111\u1ed9ng c\u01a1 r\u1ea5t m\u1ea1nh cho s\u1ef1 ti\u1ebfn b\u1ed9 v\u1ec1 \u0111\u01b0\u1eddng tinh th\u1ea7n, tr\u00ed th\u1ee9c v\u00e0 \u0111\u1ea1o l\u00fd.\u201d (Pythagore)
\u2022\u00a0\u00a0 \u00a0\u201cThi\u1ec1n \u0111\u1ee9ng ri\u00eang m\u1ed9t ch\u00e2n tr\u1eddi c\u00f9ng tuy\u1ec7t, ch\u1ee7 tr\u01b0\u01a1ng ch\u1ec9 th\u1eb3ng v\u00e0o n\u01a1i t\u00e1nh, th\u1ea5y th\u1eb3ng n\u01a1i t\u1ef1 t\u00e2m \u0111\u1ec3 t\u1ee9c kh\u1eafc th\u00e0nh PH\u1eacT kh\u1ecfi ph\u1ea3i kh\u1ed5 tu nhi\u1ec1u ki\u1ebfp.\u201d (Mahamatri)
\u2022\u00a0\u00a0 \u00a0L\u00e0 nh\u1eadn bi\u1ebft c\u1ee7a \u201ct\u00e2m\u201d con ng\u01b0\u1eddi; l\u00e0 d\u1ecbch c\u1ee7a c\u1ee7a v\u0169 tr\u1ee5; l\u00e0 b\u1ea3n ch\u1ea5t c\u1ee7a \u201ct\u00e2m\u201d lu\u00f4n \u0111\u1ed9ng; l\u00e0 \u201cs\u1ed1ng \u2013 ch\u1ebft\u201d c\u1ee7a t\u00e2m \u201ckh\u00f4n\u201d.
\u2022\u00a0\u00a0 \u00a0L\u00e0 t\u01b0 duy v\u1ec1 \u0111\u00fang sai v\u00e0 x\u1eed l\u00fd ch\u00fang m\u1ed9t c\u00e1ch th\u1ea5u \u0111\u00e1o cho \u0111\u1ebfn khi kh\u00f4ng c\u00f2n b\u00e0n v\u1ec1 sai \u0111\u00fang m\u1ed9t c\u00e1ch t\u1ef1 nhi\u00ean.
\u2022\u00a0\u00a0 \u00a0Th\u00ed kh\u1ea3o c\u00f3 th\u1ec3 l\u1eadp lu\u1eadn kh\u00e1c v\u1ec1 \u201cthi\u1ec1n\u201d.
L\u1ee3i \u00edch (c\u1ea7n \u0111\u01b0\u1ee3c th\u00ed kh\u1ea3o d\u00f9ng hi\u1ec3u bi\u1ebft \u0111\u1ec3 minh h\u1ecda):
\u2022\u00a0\u00a0 \u00a0Th\u00e2n th\u1ec3 kh\u1ecfe m\u1ea1nh: kinh m\u1ea1ch l\u01b0u th\u00f4ng; tu\u1ea7n ho\u00e0n m\u00e1u t\u1ed1t h\u01a1n do \u0111\u00f3 ng\u01b0\u1eddi th\u1ef1c t\u1eadp thi\u1ec1n th\u1ea5y vui v\u1ebb y\u00eau \u0111\u1eddi h\u01a1n; c\u00e1c b\u1ec7nh c\u1ee7a th\u00e2n t\u1ef1 nhi\u00ean bi\u1ebfn m\u1ea5t.
\u2022\u00a0\u00a0 \u00a0Minh m\u1eabn s\u00e1ng su\u1ed1t trong x\u1eed l\u00fd c\u00f4ng vi\u1ec7c; c\u00e1c th\u00f3i h\u01b0 t\u1eadt x\u1ea5u t\u1eeb t\u1eeb bi\u1ebfn m\u1ea5t; ng\u01b0\u1eddi \u0111\u1ea1t th\u00e0nh t\u1ef1u thi\u1ec1n kh\u00f4ng c\u00f2n mu\u1ed1n tranh \u0111ua v\u1edbi \u0111\u1eddi do t\u00e2m \u201cthanh\u201d l\u00e0m ch\u1ee7 b\u1ea3n th\u1ec3; h\u1ee3p nh\u1ea5t v\u1edbi v\u0169 tr\u1ee5 khi\u1ebfn h\u1ecd nh\u1eadn bi\u1ebft s\u1ef1 vi\u1ec7c, con ng\u01b0\u1eddi nh\u01b0\u00a0 ch\u00ednh m\u00ecnh.
\u2022\u00a0\u00a0 \u00a0Ng\u01b0\u1eddi th\u1ef1c h\u00e0nh thi\u1ec1n c\u00f2n l\u00e0 th\u00e0nh vi\u00ean n\u00f2ng c\u1ed1t g\u00f3p ph\u1ea7n l\u00e0m b\u1ea7u kh\u00f4ng kh\u00ed gia \u0111\u00ecnh & x\u00e3 h\u1ed9i (XH) tr\u1edf n\u00ean an h\u00f2a; khi ph\u00e1t tri\u1ec3n n\u0103ng l\u01b0\u1ee3ng th\u00edch h\u1ee3p c\u00f3 kh\u1ea3 n\u0103ng ch\u1eefa b\u1ec7nh gi\u00fap cho th\u00e2n nh\u00e2n & c\u1ed9ng \u0111\u1ed3ng; t\u1eadp h\u1ee3p s\u1ee9c m\u1ea1nh c\u1ee7a tr\u00ed g\u00f3p s\u1ee9c gi\u00fap cho XH ph\u1ed3n vinh.<\/p>\n
Thi\u1ec1n \u0111\u1ee9ng ri\u00eang bi\u1ec7t nh\u01b0 m\u1ed9t kh\u00e1i ni\u1ec7m, m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a tri\u1ebft l\u00fd hay \u0111\u1ea1o gi\u00e1o kh\u00f4ng mang \u0111\u1ebfn cho con ng\u01b0\u1eddi l\u1ee3i \u00edch g\u00ec; Ch\u1ec9 c\u00f3 k\u1ebft h\u1ee3p thi\u1ec1n v\u1edbi cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y m\u1edbi th\u1eadt \u201cthi\u1ec1n\u201d c\u00f3 l\u1ee3i l\u1ea1c cho con ng\u01b0\u1eddi v\u00e0 x\u00e3 h\u1ed9i.
(Tr\u01b0\u01a1ng Th\u1ecb Minh Nguy\u1ec7t)<\/p>\n","protected":false},"excerpt":{"rendered":"
Ng\u00e0y 12 th\u00e1ng 12 n\u0103m 2010 Ban ch\u1ee7 nhi\u1ec7m CLB \u1ee8ng d\u1ee5ng Ti\u1ec1m n\u0103ng Con ng\u01b0\u1eddi TPHCM\u00a0 \u0111\u00e3 t\u1ed5 ch\u1ee9c \u201ccu\u1ed9c thi t\u00ecm hi\u1ec3u ti\u1ec1m n\u0103ng con ng\u01b0\u1eddi\u201d mang t\u00ean \u201cM\u00e1i Hi\u00ean Nh\u00e0 T\u00f4i\u201d. Ba \u0111\u1ed9i chung s\u1ee9c d\u01b0\u1edbi c\u00e1c t\u00ean \u201cH\u01b0\u01a1ng Th\u1ea7m\u201d, \u201cTre Ng\u00e0\u201d v\u00e0 \u201cHoa S\u1eefa\u201d \u0111\u00e3 chia s\u1ebb nh\u1eefng \u00fd ki\u1ebfn c\u1ee7a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"http:\/\/www.yogavocuc.com\/index.php?rest_route=\/wp\/v2\/posts\/59"}],"collection":[{"href":"http:\/\/www.yogavocuc.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.yogavocuc.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.yogavocuc.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.yogavocuc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=59"}],"version-history":[{"count":0,"href":"http:\/\/www.yogavocuc.com\/index.php?rest_route=\/wp\/v2\/posts\/59\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.yogavocuc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=59"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yogavocuc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=59"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yogavocuc.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=59"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}