To taub Ib qho tseem ceeb tshaj plaws tseem ceeb Confusion Specs
Yog hais tias muaj ib tus ntuav lus qhia puas tau muaj nuj nqis saib, nws yog qhov kev ntsuam xyuas lub cev. Kev paub tseeb qhia koj ntau npaum li cas uas koj tau txais los ntawm ib tus neeg hais lus nrog ib tus nqi ntawm lub hwj chim. Tsuas yog nws tuaj yeem cuam tshuam rau koj xaiv tus neeg hais lus xwb, tab sis nws kuj yog qhov koj xaiv qhov kev sib tshuam ntawm lub tso suab / lub zog . Mob siab yog ib qho tseem ceeb rau Bluetooth tham , soundbars, thiab subwoofers, txawm tias cov khoom yuav tsis teev cov lus qhia tshwj xeeb.
Dab Tsi Txhais Li Cas
Tus neeg hais lus yog nws tus kheej piav qhia thaum koj nkag siab tias nws ntsuas li cas. Pib los ntawm ib lub ntsuas microphone los yog SPL (suab siab qib) ntsuas raws li ib lub 'meter' ntawm sab ntawm tus neeg hais lus. Tom qab ntawd txuas ib qhov kev hloov rau tus neeg hais lus thiab ua lub teeb liab; koj yuav xav kho cov qib kom tus neeg tuaj yeem pab txhawb nqa ib leeg ntawm ib lub hwj chim rau tus neeg hais lus . Tam sim no saib cov ntsiab lus, ntsuas hauv decibels (dB), hauv lub microphone los yog SPL meter. Qhov ntawd yog qhov cuab yeej ntawm tus neeg hais lus.
Qhov siab tshaj qhov kev ntsuam xyuas ntawm tus neeg hais lus, nws yuav ua si nrog ib qhov nqi ntawm kev siv wattage. Piv txwv li, qee cov neeg tham tau muaj kev txhawj xeeb txog 81 dB los yog li ntawd. Qhov no txhais tau tias muaj ib lub hwjchim ntawm lub hwjchim, lawv mam li xa ib qib mloog xwb. Xav 84 dB? Koj yuav tsum tau muaj ob watts - qhov no yog vim qhov tseeb tias txhua txhua 3 dB ntawm lub ntim yuav tsum yog ob npaug zog. Xav ntaus ib co zoo thiab nrov siab tshaj 102 dB peaks hauv koj lub tsev ua yeeb yam hauv tsev? Koj yuav tsum tau 128 watts.
Kev ntsuam xyuas ntawm qhov mob ntawm 88 dB yog nruab nrab. Txhua yam hauv qab 84 dB yog xam qhov tsis zoo ntawm qhov tsis zoo. Qhov mob ntawm 92 dB lossis siab dua yog qhov zoo thiab yuav tsum tau nrhiav tom qab.
Puas muaj txiaj ntsig thiab raug mob tib yam?
Yog thiab tsis yog. Koj yuav pom cov lus "rhiab heev" thiab "kev ua haujlwm" siv los hloov suab, uas yog ib qho zoo. Cov neeg feem coob yuav tsum paub tias koj txhais li cas thaum koj hais ib tus neeg hais lus muaj "89 dB efficiency." Technically, efficiency thiab rhiab heev txawv, txawm tias lawv piav txog tib lub tswvyim. Cov lus tshaj tawm txog kev xav tau yuav hloov dua siab tshiab rau kev ua haujlwm thiab lwm yam.
Kev ua tau zoo yog qhov muaj hwj chim mus rau ib tus neeg hais lus uas tau hloov dua siab tshiab rau hauv lub suab. Cov nqi no feem ntau tsawg dua ib feem pua, uas qhia rau koj tias feem ntau ntawm lub hwj chim xa mus rau tus neeg hais lus tas li sov thiab tsis hnov.
Kev Ntsuas Li Cas Lawm Li Tau Txais
Nws tsis tshua muaj kev lag luam hais lus piav qhia txog qhov lawv paub ntau npaum li cas. Feem ntau nyiam qhia koj tias koj twb paub lawm; Qhov kev ntsuas no tau ua tiav ib qho ntawm ib lub vuab tsuab nyob ntawm ib-moom nrug. Hmoov tsis, kev ntsuam xyuas kev txawj ntse yuav ua tau rau ntau txoj hau kev.
Koj tuaj yeem ntsuas kev txhim kho nrog lub suab paj nruag. Txawm li cas los xij, lub suab paj nruag liab nrov nyob hauv qib, uas txhais tau hais tias nws tsis yog qhov tseeb tshwj tsis yog tias koj muaj ib lub 'meter' uas ua hauj lwm qhov ntau tshaj ob peb feeb. Cov suab paj nruag kuj tsis pom zoo rau ntau txoj hauv kev limiting rau ib hom paj ntawm suab. Piv txwv li, tus neeg hais lus uas muaj nws cov ntses bass thaj tsam boosted by +10 dB yuav muaj kev ntsuam xyuas dua, tab sis nws yog "khib nyiab" vim tias tag nrho cov nias siab ntsaws. Ib tug siv tau hnyav curves - xws li A-hnyav, uas tsom rau cov suab ntawm 500 Hz thiab 10 kHz - mus rau ib lub ntsuas phom SPL los lim tawm zaus zaus. Tab sis qhov no ntxiv ua haujlwm.
Ntau tus nyiam los soj ntsuam kev rhiab heev los ntawm kev noj cov lus teb rau cov lus teb ntawm cov teeb meem ntawm cov teeb meem. Ces koj yuav nruab nrab tag nrho cov lus teb cov lus nug ntawm 300 Hz thiab 3,000 Hz. Qhov kev qhia no zoo heev thaum xa cov txiaj ntsig tau rov qab ua tau zoo dua nrog rau 0.1 dB.
Tab sis, ces muaj cov nqe lus nug ntawm seb puas muaj qhov kev ntsuam xyuas tau ua anechoically los yog hauv chav. Kev ntsuas kev ntsuas anchoic considers tsuas yog lub suab tawm ntawm tus neeg hais lus thiab ignores reflections los ntawm lwm yam khoom. Qhov no yog ib qho txheej txheem uas tau txais kev pab, yog qhov uas nws rov ua tau thiab meej. Txawm li cas los xij, hauv kev ntsuam xyuas hauv chav hauv yuav muab ib daim duab "ntau tshaj plaws hauv lub ntiaj teb" ntawm cov suab qib uas tawm los ntawm ib tus neeg hais lus. Tiam sis hauv-chav ntsuam feem ntau muab koj ib qho ntxiv 3 dB los yog li ntawd. Tu siab, feem ntau cov tuam ntxhab tsis qhia rau koj yog tias lawv cov kev ntsuas puas yog anechoic los yog hauv-chav - qhov zoo tshaj plaws yog thaum lawv muab koj ob leeg kom koj tuaj yeem pom koj tus kheej.
Qhov Dab Tsi No Muaj Dab Tsi Nrog Soundbars thiab Bluetooth Speakers?
Puas tau pom tias cov neeg hais lus hauv sab hauv, xws li subwoofers, soundbars, thiab Bluetooth tham , yuav luag tsis sau lawv cov kev xav? Cov neeg hais lus no raug suav hais tias "kaw systems," txhais tau hais tias rhiab heev (los yog lub hwj chim ntaus nqi) tsis txawv npaum li lub peev xwm tag nrho los ntawm chav tsev.
Nws yuav zoo saib cov kev xav txog kev sib tw rau cov lus tsav tsheb uas siv hauv cov khoom no. Cov kws lag luam tsis tshua pom zoo kom qhia lub hwj chim ntawm cov neeg ua haujlwm, lub sij hawm touting cov xov tooj zoo xws li 300 W rau ib qho pheej yig suab seev los yog 1,000 W rau lub tsev-theatre-in-a-box system.
Tab sis fais fab tuag rau cov khoom no yog ze li ntawm peb qho laj thawj:
- Qhov chaw tsim tshuaj paus yuav luag tsis qhia koj seb lub zog ntsuas li cas (qhov siab tshaj plaws kev sib thooj, qhov khoom impedance, thiab lwm yam.) Lossis yog lub tshuab fais fab tuag tuaj yeem xa cov kua txiv hmab txiv ntoo ntawd ntau npaum li cas.
- Tus nqi zog ntawm qhov ntsuas zog tsis qhia rau koj li cas nrov chav ua haujlwm yuav ua si tshwj tsis yog tias koj tseem paub txog cov lus qhia tsav tsheb.
- Txawm hais tias tus amp tso tawm ntawd muaj hwj chim, koj tsis paub hais tias cov neeg tsav tsheb hais lus tsav tau lub hwj chim. Soundbar thiab Bluetooth hais lus tsav tsheb zoo li yuav pheej yig.
Cia peb hais tias lub suab nrov, nyob ntawm 250 W, yog sau 30 watts-ib-channel hauv kev siv. Yog hais tias lub suab lus siv cov tsav pheej yig heev - cia peb mus nrog 82 dB rhiab - ces qhov theoretical output yog li 97 dB. Uas yuav yog ib theem zoo nkauj txaus rau kev ua si thiab kev ua yeeb yam! Tab sis muaj ib qho teeb meem xwb; cov tsav tsheb no tsuas siv tau 10 watts, uas yuav txo tau cov suab lus kom nrov txog 92 dB. Thiab qhov tsis yog tiag tiag nrov txaus rau txhua yam ntau tshaj li niaj hnub saib TV.
Yog hais tias lub suab lus nrov muaj cov neeg tsav tsheb nyob ntawm 90 dB rhiab heev, ces koj xav tau tsuas eight watts rau lawv kom 99 dB. Thiab yim watts ntawm lub hwj chim tsis tshua muaj peev xwm thawb tus tsav tsheb dhau los ntawm lawv cov kev txwv.
Lub tswv yim xaus mus txog ntawm no yog tias cov khoom siv hauv kev lag luam, xws li soundbars, Bluetooth hais lus, thiab subwoofers, yuav tsum tau muab ntsuas los ntawm tag nrho cov ntim lawv tuaj yeem ua tau thiab tsis yog cov dawb huv wattage. Tus SPL kev ntsuam xyuas ntawm lub suab lus, Bluetooth lus, lossis subwoofer yog lub ntsiab lus tseem ceeb vim tias nws muab koj lub tswv yim ntawm qhov tseeb ntawm cov khoom ntim cov khoom ua tau zoo li cas. Ib qho kev ntsuam xyuas qhov tsis muaj wattage tsis yog.
Nov yog lwm tus qauv. Hsu Research tus VTF-15H subwoofer muaj 350-watt amp thiab tso tawm qhov nruab nrab ntawm 123.2 dB SPL ntawm 40 thiab 63 Hz. Sunfire's Atmos subwoofer - ib qho tsim me me uas tsim tsawg dua qub - muaj 1,400-watt amp, tsis tau them tshaj 108.4 dB SPL ntawm 40 thiab 63 Hz. Kom meej meej, wattage tsis qhia zaj dab neeg ntawm no. Nws tsis txawm tuaj ze.
Raws li ntawm 2017, tsis muaj kev lag luam txuj rau SPL kev rau cov khoom lag luam, tab sis nws muaj cov kev coj ua tsim nyog. Ib txoj hauv kev ua nws yog tig cov khoom mus txog qib siab tshaj plaws uas nws muaj peev xwm ua tau zoo ua ntej distortion ua objectionable (ntau, yog tsis yog feem ntau, soundbars thiab Bluetooth tham tau khiav ntawm tag nrho ntim tsis muaj objectionable distortion), mam li ntsuas cov qhov tso tawm ntawm ib qho siv lub vojvoog suab paj nruag -10 dB. Ntawm cov hoob kawm, kev txiav txim siab txog theem ntawm distortion yog objectionable yog subjective; qhov chaw tsim tshuaj yuav siv kev cuam tshuam kev cuam tshuam kev sib tw , coj ntawm tus neeg tsav tsheb ua lus, tsis yog.
Obviously, muaj kev xav tau rau ib lub koom haum kev lag luam los tsim cov kev coj ua thiab cov txheej txheem rau kev ntsuas cov khoom lag luam tawm suab. Qhov no yog dab tsi tshwm sim rau CEA-2010 tus qauv rau cov ntaub ntawv subwoofers. Vim tias tus txheej txheem, peb muaj peev xwm tam sim no tau txais ib lub tswv yim zoo heev txog tias qhov nrov subwoofer yuav ua tau li cas.
Puas Muaj Qhov Zoo Tshaj Plaws?
Tej zaum koj yuav xav tias yog vim li cas cov tuam txhab tsis tsim cov neeg hais lus uas zoo li ua tau. Nws yog feem ntau vim hais tias compromises yuav tsum tau ua kom tiav rau tej theem ntawm rhiab heev. Piv txwv, lub khob ntawm lub woofer / neeg tsav tsheb tuaj yeem ua kom pom kev zoo los txhim kho kev mob siab. Tab sis qhov no yuav ua rau muaj ntau lub khob hliav qab, uas yuav ua rau tag nrho distortion. Thiab thaum hais lus engineers mus txog kev tshem tawm cov pliaj pe hawm hauv tus neeg hais lus teb, feem ntau lawv yuav tsum txo qhov kev xav tau. Yog li ntawd nws yog yam zoo li no tias cov lag luam yuav tsum sib npaug.
Tab sis nrog txhua yam kev xam pom, xaiv ib tus neeg hais lus nrog ib tus neeg siab zog dua yog qhov kev xaiv zoo dua. Koj yuav kawg them me ntsis ntxiv, tab sis nws yuav tsim nyog nws kawg.