Tej zaum koj yuav tau hla cov khoom lag luam uas tau teev tseg lossis tseem tau nyeem cov kev sib tham txog qhov sib piv ntawm lub teeb liab-rau-lub suab nrov. Feem ntau sau ua SNR lossis S / N, qhov kev qhia tshwj xeeb no tuaj yeem zoo li cryptic rau cov neeg siv khoom nruab nrab. Txawm li cas los xij, thaum lej tom qab lub teeb liab-rau-lub suab sib piv yog kev, lub tswv yim tsis yog, thiab tus nqi teeb liab-rau-lub suab nrov tuaj yeem cuam tshuam rau lub kaw lus tag nrho lub suab zoo.
Signal-rau-Noise piv piav qhia
Ib lub teeb liab-rau-nruab piv piv ib theem ntawm lub teeb liab lub zog rau ib theem ntawm lub suab nrov. Nws yog feem ntau qhia raws li kev ntsuas ntawm decibels (dB). Cov lej siab dua feem ntau txhais tau tias qhov kev qhia zoo dua vim tias muaj cov ntaub ntawv tseem ceeb (lub teeb liab) dua li cov ntaub ntawv tsis xav tau (lub suab nrov).
Piv txwv li, thaum lub suab sib txuas teev cov teeb liab-rau-nruab nrab ntawm 100 dB, nws txhais tau hais tias lub suab teeb liab theem yog 100 dB siab dua lub suab nrov. Yog li ntawd, lub teeb liab-rau-nruab piv specification ntawm 100 dB yog considerably zoo dua ib tug uas yog 70 dB los yog tsawg dua.
Rau qhov piv txwv, cia peb hais tias koj tab tom tham nrog ib tus phooj ywg hauv chav ua noj uas kuj tshwm sim muaj lub tub yees txias tshwj xeeb. Cia peb hais tias lub tub yees tsim 50 dB ntawm hum-xav txog qhov no lub suab nrov-raws li nws ua kom nws cov ntsiab lus txias. Yog tias tus phooj ywg koj tab tom hais lus ntxhi ntawm 30 dB-xav txog qhov no lub teeb liab-koj yuav tsis hnov ib lo lus vim lub tub yees lub hum overpowers koj tus phooj ywg cov lus.
Koj tuaj yeem hais kom koj tus phooj ywg hais kom nrov dua, tab sis txawm tias ntawm 60 dB, koj tseem yuav tau hais kom lawv rov hais dua. Hais lus ntawm 90 dB tej zaum yuav zoo li zoo li qw qw, tab sis tsawg kawg cov lus yuav hnov thiab to taub. Qhov ntawd yog lub tswv yim tom qab lub teeb liab-rau- suab nrov piv.
Vim li cas Teebmeem-rau-Ntawm-Ntsig Qhov Ntsuas Tseem Ceeb
Koj tuaj yeem pom cov lus qhia tshwj xeeb rau cov teeb liab-rau-nruj piv tau hauv ntau yam khoom uas cuam tshuam nrog lub suab, suav nrog cov hais lus, xov tooj (wireless lossis lwm yam), headphones, microphones, amplifiers, receivers, turntables, radios, CD/DVD / media player, PC suab phaib, smartphones, ntsiav tshuaj, thiab lwm yam. Txawm li cas los xij, tsis yog txhua tus neeg tsim khoom ua rau tus nqi no nkag tau yooj yim.
Lub suab nrov tiag tiag feem ntau pom tias yog xim dawb lossis hluav taws xob hiss lossis zoo li qub lossis qis lossis vibrating hum. Crank qhov ntim ntawm koj cov neeg hais lus txhua txoj hauv kev thaum tsis muaj dab tsi ua si; Yog tias koj hnov nws, qhov no yog lub suab nrov, uas feem ntau hu ua "suab nrov pem teb." Ib yam li lub tub yees hauv qhov xwm txheej uas tau piav qhia dhau los, lub suab nrov hauv pem teb no yeej ib txwm muaj.
Tsuas yog lub teeb liab nkag tau muaj zog thiab zoo tshaj lub suab nrov hauv pem teb, lub suab yuav tswj tau qhov zoo dua, uas yog hom teeb liab-rau-suab nrov piv rau lub suab meej thiab meej.
Dab tsi txog ntim?
Yog tias lub teeb liab tshwm sim tsis muaj zog, tej zaum koj yuav xav tias koj yuav tsum tau nce lub ntim los txhawb cov zis. Hmoov tsis zoo, kev kho lub ntim nce thiab nqis cuam tshuam rau ob lub suab nrov hauv pem teb thiab lub teeb liab. Cov suab paj nruag yuav nrov dua, tab sis cov suab nrov hauv qab yuav yog li ntawd. Koj yuav tsum tau boost xwb lub teeb liab lub zog ntawm qhov chaw kom ua tau raws li qhov xav tau. Qee cov khoom siv muaj cov khoom siv kho vajtse lossis cov khoom siv software uas tsim los txhim kho lub teeb liab-rau-nruj piv.
Hmoov tsis zoo, txhua yam khoom siv, txawm tias cov cables, ntxiv qee cov suab nrov rau lub teeb liab suab. Cov khoom siv zoo tshaj plaws yog tsim los ua kom lub suab nrov hauv pem teb kom tsawg li sai tau kom ua kom qhov sib piv. Cov khoom siv analogues, xws li amplifiers thiab turntables feem ntau muaj qis dua cov teeb liab-rau-lub suab sib piv dua li cov khoom siv digital.
Lwm yam kev txiav txim siab
Nws yog qhov tsim nyog zam kom tsis txhob muaj cov khoom lag luam nrog cov teeb liab tsis zoo-rau-lub suab sib piv. Txawm li cas los xij, qhov sib piv ntawm lub teeb liab-rau-suab nrov yuav tsum tsis txhob siv raws li qhov tshwj xeeb los ntsuas lub suab zoo ntawm cov khoom. Cov lus teb zaus thiab kev sib haum xeeb, piv txwv li, yuav tsum tau muab coj los xav.
