Video: Lub teeb liab rau lub suab nrov yog dab tsi thiab vim li cas nws tseem ceeb?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Teeb liab rau suab nrov piv yog tseem ceeb vim hais tias hauv kev sib txuas lus peb lub ntsiab tseem ceeb yog rau teeb liab tab sis thaum kis tau tus mob nws tau cuam tshuam los ntawm ib co random suab nrov . Thaum kawg tau txais peb xav kom muaj tib yam kis tau tus mob teeb liab , kom ua tiav qhov no suab nrov yuav tsum tau txo qis thiab ntawm no SNR play ib tseem ceeb luag hauj lwm.
Xav txog qhov no, kev siv lub teeb liab rau lub suab nrov yog dab tsi?
Teeb liab-rau-nrawm piv (ua luv SNR los yog S/N) yog kev ntsuas siv hauv kev tshawb fawb thiab engineering uas sib piv cov qib ntawm qhov xav tau teeb liab mus rau theem ntawm keeb kwm yav dhau suab nrov . SNR yog txhais raws li tus piv ntawm teeb liab zog rau suab nrov hwj chim, feem ntau qhia nyob rau hauv decibels.
Tsis tas li ntawd, dab tsi yog lub teeb liab zoo rau lub suab nrov piv rau lub turntable? Yuav muaj ntau dua suab nrov los ntawm lwm qhov chaw uas koj yuav hnov ua ntej. 50dB yog a zoo txaus S/N piv rau nruab nrab mloog. Thiab 60 dB lossis siab dua yog heev zoo.
Ua raws li qhov no hauv kev txiav txim siab, kuv tuaj yeem txhim kho kuv lub teeb liab rau lub suab nrov li cas?
Rau nce tus teeb liab-rau-lub suab piv , peb yuav tsum muab cov FIDs los ntawm lub qhov rais muaj nuj nqi uas yuav txo tau cov suab nrov thiab coj mus rau ib tug txheeb ze nce hauv teeb liab zog.
Koj nyeem cov teeb liab rau lub suab nrov li cas?
SNR xam - Nyuaj Rau lub hwj chim, SNR = 20 log(S ÷ N); rau voltage, SNR = 10 log(S ÷ N). Qhov tshwm sim ntawm qhov kev suav no yog SNR hauv decibels. Piv txwv li, koj ntsuas suab nrov tus nqi (N) yog 1 microvolt, thiab koj teeb liab (S) yog 200 millivolts. SNR yog 10 log.
Pom zoo:
Lub hom phiaj tseem ceeb ntawm lub suab ntsuas hauv suab hluav taws xob engineering yog dab tsi?
Sound-level meter, ntaus ntawv ntsuas qhov siv ntawm lub suab nrov, suab paj nruag, thiab lwm yam suab. Ib lub meter ib txwm muaj lub microphone rau khaws lub suab thiab hloov mus rau hauv lub teeb liab hluav taws xob, ua raws li hluav taws xob circuitry rau kev khiav hauj lwm ntawm cov teeb liab no kom cov yam ntxwv xav tau tuaj yeem ntsuas
Kev tshawb xyuas network yog dab tsi thiab nws ua li cas thiab vim li cas nws thiaj xav tau?
Network auditing yog txheej txheem uas koj lub network tau teeb tsa ob qho tib si ntawm software thiab kho vajtse. Cov txheej txheem tuaj yeem ua rau poob siab yog tias ua tiav manually, tab sis hmoov zoo qee cov cuab yeej tuaj yeem pab automate ib feem ntawm cov txheej txheem. Tus thawj coj yuav tsum paub tias lub tshuab thiab cov cuab yeej txuas nrog lub network li cas
Vim li cas nws yog ib qho tseem ceeb los cais kev lag luam thiab nws cov khoom siv rau hauv qib?
Nov yog 5 qhov txiaj ntsig ntawm kev sib cais daim ntawv thov rau hauv qib: Nws muab koj lub peev xwm los hloov kho cov txheej txheem thev naus laus zis ntawm ib qib, tsis muaj kev cuam tshuam rau lwm thaj chaw ntawm daim ntawv thov. Nws tso cai rau pab pawg txhim kho sib txawv rau txhua qhov haujlwm ntawm lawv tus kheej cov kev txawj ntse
Koj txhais cov teeb liab rau lub suab nrov li cas?
Lub teeb liab-rau-Noise Ratio Piav Qhia Piv txwv li, thaum ib qho khoom siv suab teev cov teeb liab-rau-nruab nrab ntawm 100 dB, nws txhais tau hais tias theem ntawm lub suab teeb liab yog 100 dB siab dua qib ntawm lub suab nrov. Lub teeb liab-rau-nruab nrab qhov tshwj xeeb ntawm 100 dB yog qhov zoo dua li ib qho uas yog 70 dB (lossis tsawg dua)
Dab tsi yog tus hais lus sau nws lub hom phiaj thiab dab tsi yog yam tseem ceeb uas yuav tsum nco ntsoov txog cov lus hais?
Cov neeg hais lus sau ntawv yog cov ntawv qhia uas tus neeg nthuav qhia siv thaum nthuav qhia qhov kev nthuav qhia. Lawv pab tus neeg nthuav qhia nco txog cov ntsiab lus tseem ceeb thaum muab kev nthuav qhia. Lawv tshwm sim ntawm tus swb thiab tuaj yeem pom tsuas yog los ntawm tus tshaj tawm thiab tsis yog cov neeg tuaj saib