{"id":7098,"date":"2026-03-31T01:29:18","date_gmt":"2026-03-31T01:29:18","guid":{"rendered":"https:\/\/blogscdn.1edo.com\/?p=7098"},"modified":"2026-07-17T07:27:34","modified_gmt":"2026-07-17T07:27:34","slug":"noise-cancellation-anc-and-enc-explained","status":"publish","type":"post","link":"https:\/\/blogs.1edo.com\/vn\/blog\/noise-cancellation-anc-and-enc-explained\/","title":{"rendered":"Kh\u1eed ti\u1ebfng \u1ed3n: Gi\u1ea3i th\u00edch v\u1ec1 ANC v\u00e0 ENC."},"content":{"rendered":"

Kh\u1eed ti\u1ebfng \u1ed3n l\u00e0 g\u00ec?<\/p>\n

Th\u1ebf gi\u1edbi c\u1ee7a ch\u00fang ta \u0111\u1ea7y r\u1eaby ti\u1ebfng \u1ed3n \u2014 ti\u1ebfng gi\u00f3, th\u1eddi ti\u1ebft, m\u00e1y bay, giao th\u00f4ng v\u00e0 nh\u1eefng ng\u01b0\u1eddi xung quanh. V\u00e0 th\u1ebf gi\u1edbi c\u1ee7a ch\u00fang ta c\u00f3 l\u1ebd s\u1ebd ng\u00e0y c\u00e0ng \u1ed3n \u00e0o h\u01a1n theo th\u1eddi gian. Tai nghe nh\u00e9t tai v\u00e0 tai nghe ch\u1ee5p tai c\u1ee7a ch\u00fang t\u00f4i \u0111\u01b0\u1ee3c trang b\u1ecb t\u00ednh n\u0103ng kh\u1eed ti\u1ebfng \u1ed3n \u0111\u1ec3 mang l\u1ea1i tr\u1ea3i nghi\u1ec7m \u00e2m thanh th\u00fa v\u1ecb h\u01a1n b\u1eb1ng c\u00e1ch lo\u1ea1i b\u1ecf nh\u1eefng \u00e2m thanh m\u00f4i tr\u01b0\u1eddng kh\u00f4ng mong mu\u1ed1n xung quanh ng\u01b0\u1eddi nghe.<\/p>\n

 <\/p>\n

\"Environmental<\/p>\n

 <\/p>\n

Kh\u1eed ti\u1ebfng \u1ed3n: Gi\u1ea3i th\u00edch v\u1ec1 ANC v\u00e0 ENC.<\/p>\n

 <\/p>\n

Ti\u00eau \u0111\u1ec1 tr\u1ed1ng<\/p>\n

C\u00f3 hai lo\u1ea1i kh\u1eed ti\u1ebfng \u1ed3n: ANC v\u00e0 ENC.<\/p>\n

Ch\u00fang t\u00f4i cung c\u1ea5p t\u00ednh n\u0103ng Kh\u1eed ti\u1ebfng \u1ed3n ch\u1ee7 \u0111\u1ed9ng (ANC) ho\u1eb7c Kh\u1eed ti\u1ebfng \u1ed3n m\u00f4i tr\u01b0\u1eddng (ENC) tr\u00ean c\u00e1c s\u1ea3n ph\u1ea9m SoundForm c\u1ee7a m\u00ecnh. M\u1eb7c d\u00f9 c\u1ea3 hai \u0111\u1ec1u ho\u1ea1t \u0111\u1ed9ng v\u1edbi hi\u1ec7u qu\u1ea3 t\u01b0\u01a1ng t\u1ef1, nh\u01b0ng c\u00e1ch s\u1eed d\u1ee5ng l\u1ea1i kh\u00e1c nhau:<\/p>\n

 <\/p>\n

ANC l\u00e0 c\u00f4ng ngh\u1ec7 kh\u1eed ti\u1ebfng \u1ed3n m\u00e0 m\u1ecdi ng\u01b0\u1eddi th\u01b0\u1eddng ngh\u0129 \u0111\u1ebfn khi n\u00f3i v\u1ec1 c\u00e1c s\u1ea3n ph\u1ea9m \u00e2m thanh. C\u00f4ng ngh\u1ec7 n\u00e0y gi\u1ea3m thi\u1ec3u ho\u1eb7c ch\u1eb7n ti\u1ebfng \u1ed3n xung quanh m\u00e0 ng\u01b0\u1eddi nghe c\u00f3 th\u1ec3 nghe th\u1ea5y khi \u0111eo tai nghe. \u0110i\u1ec1u n\u00e0y mang l\u1ea1i tr\u1ea3i nghi\u1ec7m nghe nh\u1ea1c ho\u1eb7c podcast t\u1ed1t h\u01a1n, v\u00ec \u00e2m thanh b\u00ean ngo\u00e0i s\u1ebd kh\u00f4ng b\u1ecb l\u1ecdt v\u00e0o.<\/p>\n

 <\/p>\n

\"Noise<\/p>\n

Kh\u1eed ti\u1ebfng \u1ed3n ch\u1ee7 \u0111\u1ed9ng<\/p>\n

 <\/p>\n

C\u00f4ng ngh\u1ec7 ENC gi\u00fap c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh \u0111\u1ea7u ra, nh\u1edd \u0111\u00f3 ng\u01b0\u1eddi g\u1ecdi s\u1ebd nghe th\u1ea5y b\u1ea1n r\u00f5 h\u01a1n. C\u00f4ng ngh\u1ec7 n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 Ch\u1ea5t l\u01b0\u1ee3ng Cu\u1ed9c g\u1ecdi R\u00f5 r\u00e0ng (Clear Call Quality), gi\u00fap gi\u1ea3m ho\u1eb7c lo\u1ea1i b\u1ecf ti\u1ebfng \u1ed3n xung quanh trong cu\u1ed9c g\u1ecdi ho\u1eb7c h\u1ed9i ngh\u1ecb video. Ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 n\u00f3i chuy\u1ec7n trong m\u00f4i tr\u01b0\u1eddng \u1ed3n \u00e0o m\u00e0 ch\u1ec9 c\u00f3 gi\u1ecdng n\u00f3i c\u1ee7a h\u1ecd \u0111\u01b0\u1ee3c thu qua micr\u00f4.<\/p>\n

 <\/p>\n

Kh\u1eed nhi\u1ec5u m\u00f4i tr\u01b0\u1eddng<\/p>\n

 <\/p>\n

Ai c\u1ea7n nh\u1eefng th\u1ee9 n\u00e0y ch\u1ee9?<\/p>\n

Ph\u1ed5 bi\u1ebfn v\u1edbi kh\u00e1ch du l\u1ecbch v\u00e0 sinh vi\u00ean, c\u00f4ng ngh\u1ec7 kh\u1eed ti\u1ebfng \u1ed3n ch\u1ee7 \u0111\u1ed9ng (ANC) gi\u00fap lo\u1ea1i b\u1ecf ti\u1ebfng \u1ed3n c\u1ee7a m\u00e1y bay, xe bu\u00fdt ho\u1eb7c t\u00e0u h\u1ecfa khi di chuy\u1ec3n. N\u00f3 c\u0169ng h\u1eefu \u00edch khi h\u1ecdc t\u1eadp ho\u1eb7c \u0111\u1ecdc s\u00e1ch \u1edf nh\u1eefng n\u01a1i c\u00f4ng c\u1ed9ng nh\u01b0 qu\u00e1n c\u00e0 ph\u00ea ho\u1eb7c khu v\u1ef1c sinh ho\u1ea1t chung c\u1ee7a k\u00fd t\u00fac x\u00e1.<\/p>\n

 <\/p>\n

Ho\u00e0n h\u1ea3o cho l\u00e0m vi\u1ec7c t\u1eeb xa v\u00e0 v\u0103n ph\u00f2ng t\u1ea1i nh\u00e0, ENC gi\u1ea3m ho\u1eb7c lo\u1ea1i b\u1ecf ti\u1ebfng \u1ed3n xung quanh trong khi g\u1ecdi \u0111i\u1ec7n tho\u1ea1i \u2014 \u0111\u1ed3ng nghi\u1ec7p ho\u1eb7c ng\u01b0\u1eddi tham d\u1ef1 cu\u1ed9c h\u1ecdp s\u1ebd kh\u00f4ng nghe th\u1ea5y ti\u1ebfng tr\u1ebb con v\u00e0 ch\u00f3 s\u1ee7a \u1edf ph\u00eda sau, ti\u1ebfng giao th\u00f4ng ho\u1eb7c c\u00e1c \u00e2m thanh kh\u00e1c.<\/p>\n

 <\/p>\n

T\u1ea1i sao n\u00ean ch\u1ecdn Belkin SoundForm?<\/p>\n

Quy tr\u00ecnh ki\u1ec3m tra \u0111\u1ed9c \u0111\u00e1o c\u1ee7a ch\u00fang t\u00f4i mang \u0111\u1ebfn cho b\u1ea1n \u00c2m thanh \u0111\u1eb7c tr\u01b0ng c\u1ee7a Belkin. V\u1edbi ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u ch\u1ec9nh \u00e2m thanh tr\u00ean to\u00e0n b\u1ed9 d\u1ea3i t\u1ea7n s\u1ed1 nghe \u0111\u01b0\u1ee3c, ch\u00fang t\u00f4i t\u00e1i t\u1ea1o \u00e2m thanh trong tai nghe v\u00e0 tai nghe nh\u00e9t tai c\u1ee7a m\u00ecnh \u0111\u1ec3 m\u00f4 ph\u1ecfng tr\u1ea3i nghi\u1ec7m nghe nh\u1ea1c t\u1eeb loa \u0111\u1ed9 trung th\u1ef1c cao trong ph\u00f2ng nghe \u0111\u01b0\u1ee3c tinh ch\u1ec9nh t\u1ed1t.<\/p>\n

 <\/p>\n

\u00c2m thanh \u0111\u1ebfn tai ng\u01b0\u1eddi nghe t\u1eeb m\u1ecdi h\u01b0\u1edbng. Do c\u1ea5u t\u1ea1o tai, c\u00e1ch ch\u00fang ta nghe m\u1ecdi th\u1ee9 b\u00ean trong tai c\u00f3 th\u1ec3 kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o ngu\u1ed3n ph\u00e1t ra \u00e2m thanh. Ch\u00fang t\u00f4i \u0111\u00e3 thi\u1ebft k\u1ebf m\u1ee5c ti\u00eau d\u1ef1a tr\u00ean c\u00e1ch s\u00f3ng \u00e2m thanh \u0111\u1ebfn tai ng\u01b0\u1eddi nghe \u1edf ph\u00eda tr\u01b0\u1edbc, m\u00f4 ph\u1ecfng c\u00e1ch \u00e2m thanh ph\u00e1t ra t\u1eeb loa \u0111\u1eb7t tr\u1ef1c ti\u1ebfp \u1edf ph\u00eda tr\u01b0\u1edbc b\u00ean tr\u00e1i v\u00e0 b\u00ean ph\u1ea3i.<\/p>\n

 <\/p>\n

C\u00e1c s\u1ea3n ph\u1ea9m \u00e2m thanh c\u1ee7a Belkin tr\u1ea3i qua 150 b\u00e0i ki\u1ec3m tra. Ti\u00eau chu\u1ea9n ki\u1ec3m \u0111\u1ecbnh thi\u1ebft k\u1ebf bao g\u1ed3m ki\u1ec3m tra ch\u1ee9c n\u0103ng, kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch, ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 \u0111\u1ed9 tin c\u1eady, c\u1ed9ng th\u00eam ki\u1ec3m tra t\u1ea1i nh\u00e0 m\u00e1y \u0111\u1ed1i v\u1edbi t\u1eebng s\u1ea3n ph\u1ea9m.<\/p>\n

 <\/p>\n

Ph\u00f2ng th\u00ed nghi\u1ec7m \u00e2m thanh n\u1ed9i b\u1ed9 c\u1ee7a ch\u00fang t\u00f4i l\u00e0 "trung t\u00e2m nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n xu\u1ea5t s\u1eafc" \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh \u00e2m thanh b\u00ean trong, ki\u1ec3m \u0111\u1ecbnh hi\u1ec7u su\u1ea5t micro v\u00e0 ki\u1ec3m \u0111\u1ecbnh kh\u1ea3 n\u0103ng kh\u1eed ti\u1ebfng \u1ed3n ch\u1ee7 \u0111\u1ed9ng.<\/p>\n

 <\/p>\n

M\u1ed9t s\u1ed1 th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi ph\u00f2ng th\u00ed nghi\u1ec7m \u00e2m thanh:<\/p>\n

 <\/p>\n

\u0110\u00e1p tuy\u1ebfn t\u1ea7n s\u1ed1 c\u1ee7a tai nghe, bao g\u1ed3m c\u1ea3 vi\u1ec7c tinh ch\u1ec9nh v\u00e0 kh\u1edbp v\u1edbi \u00e2m thanh \u0111\u1eb7c tr\u01b0ng Belkin Signature Sound mong mu\u1ed1n.<\/p>\n

\u0110o l\u01b0\u1eddng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o gi\u1edbi h\u1ea1n m\u00e9o h\u00e0i t\u1ed5ng (THD) v\u00e0 gi\u1edbi h\u1ea1n nhi\u1ec5u n\u1ec1n th\u1ea5p.<\/p>\n

Tu\u00e2n th\u1ee7 c\u00e1c gi\u1edbi h\u1ea1n m\u1ee9c \u00e1p su\u1ea5t \u00e2m thanh (SPL) t\u1ed1i \u0111a an to\u00e0n theo ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf v\u00e0 ti\u00eau chu\u1ea9n d\u00e0nh cho tr\u1ebb em (EN50332).<\/p>\n

\u0110\u00e1nh gi\u00e1 hi\u1ec7u su\u1ea5t c\u1ee7a t\u00ednh n\u0103ng Kh\u1eed ti\u1ebfng \u1ed3n xung quanh (ANC), v\u00e0 th\u1eed nghi\u1ec7m c\u0169ng nh\u01b0 tinh ch\u1ec9nh c\u00e1c bi\u1ebfn th\u1ec3 ANC kh\u00e1c nhau, bao g\u1ed3m c\u1ea3 ch\u1ebf \u0111\u1ed9 \u201ctruy\u1ec1n ti\u1ebfng \u1ed3n\u201d.\u201d<\/p>\n

\u0110i\u1ec3m \u0111\u00e1nh gi\u00e1 trung b\u00ecnh (MOS) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 c\u1ee7a micro trong c\u00e1c cu\u1ed9c g\u1ecdi tho\u1ea1i.<\/p>\n

C\u00e1c b\u00e0i ki\u1ec3m tra \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng Audio Precision (APx517) v\u00e0 KEMAR HATS (H\u1ec7 th\u1ed1ng \u0110\u1ea7u v\u00e0 Th\u00e2n) t\u1eeb GRAS: thi\u1ebft b\u1ecb ki\u1ec3m tra h\u00e0ng \u0111\u1ea7u, \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn trong ng\u00e0nh d\u00e0nh cho tai nghe v\u00e0 tai nghe nh\u00e9t tai.<\/p>","protected":false},"excerpt":{"rendered":"

What is noise cancellation? Our world is filled with noise \u2014 the sound of wind, weather, airplanes, traffic and the people around us. And our world is likely to just keep getting noisier as time goes on. Our earbuds and headphones feature noise cancellation to offer a more enjoyable audio experience by removing the unwanted […]<\/p>","protected":false},"author":20,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62,142],"tags":[151],"class_list":["post-7098","post","type-post","status-publish","format-standard","hentry","category-blog","category-technical-articles","tag-headsets-speakers"],"_links":{"self":[{"href":"https:\/\/blogs.1edo.com\/vn\/wp-json\/wp\/v2\/posts\/7098","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.1edo.com\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.1edo.com\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.1edo.com\/vn\/wp-json\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.1edo.com\/vn\/wp-json\/wp\/v2\/comments?post=7098"}],"version-history":[{"count":1,"href":"https:\/\/blogs.1edo.com\/vn\/wp-json\/wp\/v2\/posts\/7098\/revisions"}],"predecessor-version":[{"id":7449,"href":"https:\/\/blogs.1edo.com\/vn\/wp-json\/wp\/v2\/posts\/7098\/revisions\/7449"}],"wp:attachment":[{"href":"https:\/\/blogs.1edo.com\/vn\/wp-json\/wp\/v2\/media?parent=7098"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.1edo.com\/vn\/wp-json\/wp\/v2\/categories?post=7098"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.1edo.com\/vn\/wp-json\/wp\/v2\/tags?post=7098"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}