Koj tuaj yeem hla cov khoom ntiag tug uas tau teev tseg, los sis tej zaum kuj tau hnov los yog nyeem ib qho kev sib tham txog qhov teeb meem ntawm lub suab nrov. Nquag hu ua SNR los sis S / N, qhov kev qhia no muaj peev xwm zoo li cryptic rau tus neeg siv nruab nrab. Txawm tias qhov kev ua lej tom qab lub suab sib-sib-sib nrov, kev xav tsis yog, thiab qhov txiaj ntsig no tuaj yeem cuam tshuam ib qhov system zoo tag nrho lub suab zoo.
Kev Teeb Meem ntawm-mus-Suab Tshaj Tawm
Qhov sib npaug ntawm cov suab paj nruag sib piv ib theem ntawm lub teeb liab ntawm lub zog ntawm lub suab nrov. Nws yog feem ntau qhia raws li kev ntsuas ntawm decibels (dB) . Cov lej siab feem ntau txhais tau tias cov lus qhia zoo dua, vim muaj ntau cov ntaub ntawv tseem ceeb tshaj (qhov teeb liab) dua li muaj cov ntaub ntawv tsis txaus siab (lub suab nrov).
Piv txwv, thaum ib lub suab sib sau teev lub suab sib-suab-nrov ntawm 100 dB, nws txhais tau hais tias theem ntawm lub teeb liab yog 100 dB siab tshaj li qib ntawm lub suab nrov. Qhov sib txawv ntawm qhov sib piv ntawm 100 dB piv zoo dua ib qho yog 70 dB (lossis tsawg dua).
Piv txwv, cia peb hais tias koj tab tom sib tham nrog ib tug neeg nyob hauv chav ua noj uas kuj muaj tshwm sim rau cov tub yees muaj suab nrov heev. Cia peb hais tias lub tub yees ua kom muaj 50 dB ntawm hum (saib qhov no ua suab nrov) raws li nws ua rau nws cov ntsiab lus txias-ib lub thawv nrov nrov. Yog hais tias tus neeg uas koj hais tau nrog xaiv tham hauv lub ncauj lus (xav tias qhov no yog qhov teeb liab) ntawm 30 dB, koj yuav tsis tau hnov ib lo lus vim hais tias nws yog overpowered los ntawm tus yees txias! Yog li, koj hais kom tus neeg hais lus ntau dua, tab sis thaum 60 dB, koj tseem yuav hais kom lawv rov hais dua. Kev hais lus ntawm 90 dB tej zaum yuav zoo li ntau dua li cov lus sib dhos, tab sis cov lus tsawg kawg yuav hnov meej thiab to taub. Qhov no yog lub tswv yim tom qab teeb liab-rau-lub suab nrov.
Vim licas rau cov teeb liab-rau-Nais nrov yog tseem ceeb
Cov lus tshaj tawm rau qhov sib txawv ntawm qhov sib txawv ntawm cov khoom thiab cov cheebtsam uas kam nrog lub suab xws li cov neeg hais lus, xov tooj (wireless los yog lwm yam), headphones, microphones, amplifiers , receivers, turntables, radios, CD / DVD / media players, PC suab lus nrov, smartphones, ntsiav tshuaj, thiab ntau yam ntxiv. Txawm li cas los xij, tsis yog txhua tus neeg ua lag luam ua qhov txiaj ntsim zoo tshaj plaws.
Qhov tseeb suab nrov feem ntau yog cov xim dawb los sis hluav taws xob los yog kev sib txawv, los yog qis los sis vibrating hum. Crank qhov ntim ntawm koj cov neeg hais lus txog kev ua si thaum tsis muaj dab tsi ua si-yog tias koj hnov lub suab, uas yog lub suab, uas yog feem ntau hu ua "floor of sound." Ib yam li lub tub yees nyob rau hauv qhov kev piav qhia yav dhau los, lub suab nrov pem suab no yeej ib txwm muaj.
Tsuav ntev li lub teeb liab uas muaj zog heev thiab zoo dua hauv pem teb suab nrov, ces lub suab yuav muaj peev xwm tswj kom zoo dua. Qhov no yog qhov zoo tshaj plaws cov suab paj nruag-rau-nrov feem neeg nyiam rau qhov tseeb thiab meej suab.
Tab sis yog tias lub teeb liab tshwm sim tsis muaj zog, qee tus neeg xav tias yuav ua rau kom qhov ntim nce ntxiv kom txhawb cov qhov tso tawm. Hmoov tsis, kho lub ntim nce thiab nqis kom cuam tshuam ob lub suab nrov pem teb thiab lub teeb liab. Cov suab paj nruag yuav tuaj yeem ua suab nrov, tab sis yuav yog qhov pib suab nrov. Koj yuav tau nce lub teeb liab ntawm lub hauv paus thiaj li ua tau raws li qhov kev xav tau. Qee cov khoom siv cuab yeej hluav taws xob thiab / lossis software ntsiab uas tsim los txhawm rau ua kom lub suab sib-suab-nrov.
Hmoov tsis, tag nrho cov khoom, cables txawm, ntxiv qee cov suab nrov nrov rau lub teeb liab. Nws yog qhov zoo tshaj plaws uas tsim los kom lub suab nrov nrov li qis tshaj plaws kom thiaj li ua siab tshaj qhov qub. Analog Devices, xws li cov amplifiers thiab turntables, feem ntau muaj pes tsawg lub suab sib-sib-sib piv dua li cov khoom siv.
Nws yog twv yuav raug hu kom tsis txhob muaj cov khoom nrog cov pluag tsis tshua muaj suab nrov-rau-suab sib luag. Txawm li cas los xij, lub suab sib-suab-nrov yuav tsum tsis txhob siv raws li qhov kev qhia tshwj xeeb los ntsuas cov suab zoo ntawm cov khoom. Cov lus teb thiab kev sib haum xeeb ntawm kev sib haum xeeb yuav tsum raug muab los xav.