Vim li cas peb thiaj xav tau crossovers hauv cov khoom acoustics?
Txheem
Thaum txhim kho lub tso suab niaj hnub hauv lub tsheb, tus tswv yuav tsum xaiv txoj cai crossover. Nws tsis yog qhov nyuaj rau ua qhov no yog tias koj thawj zaug paub koj tus kheej nrog nws yog dab tsi, nws yog qhov tsim nyog rau, thiab ua ib feem ntawm cov neeg hais lus nws yuav ua haujlwm.
Lub hom phiaj
⭐ ⭐ ⭐ ⭐ ⭐ Crossover yog ib qho cuab yeej tshwj xeeb hauv cov qauv ntawm cov neeg hais lus, tsim los npaj cov khoom ntiag tug uas xav tau rau txhua tus neeg hais lus. Cov tom kawg yog tsim los ua haujlwm nyob rau hauv qee qhov ntau zaus. Cov zis ntawm qhov zaus ntawm lub teeb liab muab rau tus neeg hais lus sab nraud ntawm qhov ntau tuaj yeem ua rau, yam tsawg kawg, mus rau distortion ntawm lub suab reproduced, piv txwv li:
- yog tias siv tsawg dhau lawm, lub suab duab yuav raug distorted;
- Yog tias siv ntau zaus, tus tswv ntawm lub tso suab yuav ntsib tsis tau tsuas yog lub suab distortion, tab sis kuj tsis ua hauj lwm ntawm lub tweeter (tweeter).
Raws li ib txwm muaj, txoj haujlwm ntawm tweeter tsuas yog tsim cov suab nrov nrov, tsawg zaus, feem, qis. Lub mid-range band yog pub rau nruab nrab-woofer - tus neeg hais lus lub luag haujlwm rau lub suab ntawm nruab nrab ntau zaus.
Raws li cov lus hais saum toj no, txhawm rau rov tsim lub suab tsheb nrog cov khoom zoo, nws yog ib qho tsim nyog los xaiv cov zaus zaus uas tsim nyog thiab siv rau cov neeg hais lus tshwj xeeb. Yuav kom daws tau qhov teeb meem no, ib tug crossover yog siv.
Crossover ntaus ntawv
Raws li txoj cai, lub crossover suav nrog ib khub ntawm cov ntxaij lim dej zaus uas ua haujlwm raws li hauv qab no: piv txwv li, yog tias qhov kev sib tw crossover tau teem rau 1000 Hz, ib qho ntawm cov ntxaij lim dej yuav xaiv cov zaus hauv qab no qhia. Thiab qhov thib ob yog ua kom tsuas yog cov zaus band uas tshaj qhov cim qhia. Cov lim dej muaj lawv tus kheej lub npe: low-pass - rau kev ua cov zaus hauv qab ib txhiab hertz; high-pass - rau kev ua ntau zaus tshaj ib txhiab hertz.
Yog li, lub hauv paus ntsiab lus uas ob txoj kev hla kev ua haujlwm tau nthuav tawm saum toj no. Kuj tseem muaj peb txoj hauv kev cov khoom lag luam. Qhov sib txawv tseem ceeb, raws li lub npe qhia, yog lub lim thib peb uas ua rau nruab nrab zaus band, los ntawm rau puas mus rau tsib txhiab hertz.
Qhov tseeb, ua kom lub suab nrov lim lim, thiab tom qab ntawd pub rau cov neeg hais lus tsim nyog, ua rau lub suab zoo dua qub thiab ntau dua qub hauv lub tsheb.
Cov yam ntxwv kev
Feem ntau niaj hnub crossovers muaj inductors thiab capacitor. Nyob ntawm seb qhov ntau thiab qhov zoo ntawm kev tsim khoom ntawm cov khoom reactive, tus nqi ntawm cov khoom tiav yog txiav txim siab vim li cas bandpass crossovers muaj xws li coils thiab capacitors? Yog vim li cas yog cov no yog cov yooj yim reactive ntsiab. Lawv ua cov zaus sib txawv ntawm lub suab teeb liab yam tsis muaj teeb meem ntau.
Cov capacitors tuaj yeem cais tawm thiab ua cov txheej txheem siab, thaum cov coils xav tau los tswj cov zaus tsawg. Kev siv cov khoom no kom raug, vim li ntawd, koj tuaj yeem tau txais qhov yooj yim zaus lim. Nws ua rau tsis muaj kev nkag siab rau delve rau hauv cov kev cai lij choj ntawm physics thiab muab cov qauv ua piv txwv. Txhua tus neeg uas xav paub txog cov txheej txheem theoretical hauv kev nthuav dav ntxiv tuaj yeem yooj yim nrhiav cov ntaub ntawv hauv phau ntawv lossis hauv Is Taws Nem. Nws yog txaus rau cov kws tshaj lij profile kom rov ua dua tshiab hauv kev nco txog lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm LC-CL hom tes hauj lwm.
Tus naj npawb ntawm cov ntsiab lus reactive cuam tshuam rau lub peev xwm crossover. Tus lej 1 qhia txog ib lub ntsiab lus, 2 - feem, ob. Nyob ntawm tus naj npawb thiab cov txheej txheem kev sib txuas ntawm cov ntsiab lus, lub kaw lus ua haujlwm lim cov zaus tsis tsim nyog rau ib qho channel hauv ntau txoj kev.
Nws ua rau kev txiav txim siab xav tias ntau cov ntsiab lus reactive thov ua rau cov txheej txheem pom zoo dua. Txoj kev lim dej tsis xav tau rau ib qho channel tshwj xeeb muaj nws tus yam ntxwv hu ua roll-off slope.
Cov ntxaij lim dej muaj cov cuab yeej ntawm kev txiav tawm tsis xav tau zaus maj mam, tsis yog tam sim ntawd.
Nws yog hu ua rhiab heev. Nyob ntawm qhov ntsuas no, cov khoom tau muab faib ua plaub pawg:
- thawj cov qauv;
- cov qauv thib ob;
- peb cov qauv;
- plaub tus qauv.
Qhov sib txawv ntawm active thiab passive crossovers
Cia peb pib qhov kev sib piv nrog passive crossover. Nws yog paub los ntawm kev xyaum hais tias passive crossover yog qhov ntau tshaj plaws thiab feem ntau ntau yam ntawm kev ua lag luam. Raws li lub npe, koj tuaj yeem nkag siab tias cov passive tsis xav tau lub zog ntxiv. Raws li, nws yooj yim dua thiab sai dua rau tus tswv lub tsheb los nruab cov khoom siv hauv nws lub tsheb. Tab sis, hmoov tsis, ceev tsis tas yuav lav zoo.
Vim yog lub hauv paus ntsiab lus passive ntawm Circuit Court, lub kaw lus yuav tsum tau siv qee lub zog los ntawm lub lim kom paub meej tias nws ua haujlwm. Hauv qhov no, cov ntsiab lus reactive zoo li hloov cov theem hloov. Tau kawg, qhov no tsis yog qhov teeb meem loj tshaj plaws, tab sis tus tswv yuav tsis tuaj yeem kho qhov zaus.
Active crossovers tso cai rau koj tshem tawm qhov teeb meem no. Qhov tseeb yog tias, txawm hais tias lawv muaj ntau qhov nyuaj tshaj li qhov passive, cov kwj suab tau lim tau zoo dua hauv lawv. Vim tias muaj cov coils thiab capacitors, tab sis kuj ntxiv cov khoom semiconductor, cov neeg tsim khoom tau tswj hwm kom txo qhov loj ntawm lub cuab yeej.
Lawv tsis tshua pom muaj cov khoom siv cais, tab sis nyob rau hauv txhua lub tsheb amplifier, ua ib feem tseem ceeb, muaj lub lim dej ua haujlwm. Vim yog lub hauv paus ntsiab lus passive ntawm Circuit Court, lub kaw lus yuav tsum tau siv qee lub zog los ntawm lub lim kom paub meej tias nws ua haujlwm. Hauv qhov no, cov ntsiab lus reactive zoo li hloov cov theem hloov. Tau kawg, qhov no tsis yog qhov teeb meem loj tshaj plaws, tab sis tus tswv yuav tsis tuaj yeem kho qhov zaus.
Active crossovers tso cai rau koj tshem tawm qhov teeb meem no. Qhov tseeb yog tias, txawm hais tias lawv muaj ntau qhov nyuaj tshaj li qhov passive, cov kwj suab tau lim tau zoo dua hauv lawv. Vim tias muaj cov coils thiab capacitors, tab sis kuj ntxiv cov khoom semiconductor, cov neeg tsim khoom tau tswj hwm kom txo qhov loj ntawm lub cuab yeej.
Lawv tsis tshua pom muaj cov khoom siv cais, tab sis nyob rau hauv txhua lub tsheb amplifier, ua ib feem tseem ceeb, muaj lub lim dej ua haujlwm.
Peb kuj qhia kom koj paub koj tus kheej nrog cov ntsiab lus "Yuav ua li cas txuas thiab nruab Twitter kom raug".
Customization nta
Txhawm rau kom tau txais lub suab zoo hauv lub tsheb vim li ntawd, koj yuav tsum xaiv qhov raug txiav tawm zaus. Thaum siv ib qho kev ua haujlwm peb-txoj kev crossover, ob qhov kev txiav tawm zaus yuav tsum tau teev tseg. Thawj qhov taw tes yuav cim kab ntawm qhov tsawg thiab nruab nrab zaus, qhov thib ob - ciam teb ntawm nruab nrab thiab siab. Ua ntej txuas lub crossover, tus tswv ntawm lub tsheb yuav tsum nco ntsoov tias nws yog ib qho tsim nyog yuav tsum xaiv cov yam ntxwv ntawm tus neeg hais lus kom raug.
Nyob rau hauv tsis muaj cov ntaub ntawv lawv yuav tsum tau noj frequencies uas lawv tsuas tsis tuaj yeem ua haujlwm ib txwm. Txwv tsis pub, nws yuav ua rau tsis tsuas yog ua rau lub suab tsis zoo, tab sis kuj ua rau txo qis hauv kev pab cuam lub neej.
Passive Crossover Wiring Diagram
Video: Lub suab crossover yog dab tsi?
xaus
Peb tau siv zog ntau los tsim cov kab lus no, sim sau nws ua hom lus yooj yim thiab nkag siab. Tab sis nws yog nyob ntawm koj txiav txim siab seb peb puas tau ua los yog tsis. Yog tias koj tseem muaj lus nug, tsim lub ntsiab lus ntawm "Lub Rooj Sab Laj", peb thiab peb cov phooj ywg hauv zej zog yuav sib tham txog tag nrho cov ntsiab lus thiab nrhiav cov lus teb zoo tshaj rau nws.
Thiab thaum kawg, koj puas xav pab qhov project? Sau npe rau peb lub zej zog Facebook.
