Kodi odulidwa wolemera pafupipafupi subwoofer ndi momwe sintha bwino

Kasinthidwe ano phokoso amplifying zida, kulenga akuzinga phokoso zikusonyeza zinchito njira kulekana. Zinthu zake n'zovuta zomvetsera zikuphatikizapo kutsogolo ndi kumbuyo okamba, malo njira ndi subwoofer.

Yotsirizira akutumikira kulenga zotsatira zina phokoso pa m'munsi pafupipafupi osiyanasiyana kuchokera 20 mpaka 180 Herz. Kwenikweni njirayi ntchito pamene kuonera TV kanema ndi mafilimu amene ali zithunzi za mabomba, imalankhula ya maroketi danga ndi mavuto ofanana ndi amene mukufuna kugoletsa kwambiri zokwanira kugwedeza mpweya.

Childs, subwoofers anaikira mfundo yogwira, ndiye ndi awo anamanga-mkuzamawu, mphamvu okwanira ndi kusintha. Amazilamulira ndi zoikamo monga zikuluzikulu ziwiri chogwirira "mlingo» (mlingo) ndi "cutoff pafupipafupi» (kusinthanitsidwa pafupipafupi). Ntchito mlingo chogwirira Ndizomveka izi lamulo mwamphamvu phokoso. Ndipo ndicho chifukwa kasinthidwe chachiwiri, zikuonekeratu osati onse.

Mosiyana ndi burodibandi okamba, subwoofer okha ndi nsonga chapamwamba pafupipafupi osiyanasiyana. Nayenso basses anawagawa kwambiri - 40 Hz, sing'anga - 80 Hz, ndi mkulu - mpaka 160 Hz. Umene pafupipafupi cutoff wakhazikika, kuya anafika ndi mmene lamayimbidwe zimatengera. Nthawi zina, mbali mu uthunthu mkulu wa yoimba ndi kutitengera phokoso lililonse limatisokoneza Mwachitsanzo, pamene kumvetsera nyimbo kapena kuonera popanda wapadera kuwonjezera. Koma ngati amafuna zotsatira kuyeza kwambiri pa wamanjenje dongosolo la wowerenga Mwachitsanzo, mu mawonekedwe a anagwa nyumba ndi zikuphulika mlengalenga, ndi subwoofer odulidwa wolemera pafupipafupi akhoza ankatembenukira kuyandikira infradiapazonu.

Mwaukadaulo, chapamwamba pafupipafupi malire - ntchito yosavuta. Kumene sayansi amadziwika kuti mphamvu sefa ndi chuma ndi ulemu kwa mafurikwense otsika ndi inductance - yapamwamba. Choncho, losavuta LC-fyuluta angathandize kupeza anakhumba malo osiyanasiyana, pamene kuchepetsa mlingo wa zoipa sipekitiramu chizindikiro. 'Kupitiriza kunja "mkulu ndi sing'anga pafupipafupi athandizira kwa subwoofer, ndi okwanira kuti athe malo kufanana Muzifunsa ndi capacitor kakang'ono - ochepa PF. Koma ngati fyuluta wosazindikira adzakhala ndichepe kwambiri yosalala pafupipafupi Poyankha, kotero kuchita zinalengedwera zovuta.

Komanso, pafupipafupi cutoff amaperekedwa ndi sefa wa chizindikiro linanena bungwe kupita ku Makaniko wamphamvu. Kuti tichite zimenezi m'thupi pafupi wokamba ndi gulu lina ndi capacitors ndi inductors.

The cutoff pafupipafupi wa LPF (otsika chikudutsa fyuluta) Choncho muyenera kusinthira, ngakhale kachitidwe chotchipa ntchito sizingakhale.

Kukhoza subwoofer kolowera poyerekezera ndi zigawo zina lamayimbidwe pa dongosolo la nyumba zisudzo - pamafunika chipiriro ndi amve. A lamulo wabwino imatengedwa, imene yoimba panamveka kuchokera kutsogolo ndi akuzinga okamba ali wodzilemekeza ndi infra-otsika mafurikwense broadcasted kwa iwo, osati "kukangana" ndi mzake, amene ali wamphamvu. Mfundo za "mokweza bwino" sachiza pano.

Choncho, cutoff pafupipafupi ndi kolowera zofunika kuti zipangitsa ntchito lolondola ndiponso zogwirizana a dongosolo wonse.