Qhov hnyav hnyav ntawm lub suab ntsuas lub suab txhais li cas rau kuv?
Qhov ntsuas lub suab nrov txhais li cas?
Lub teeb liab suab nrov piv (Signal Noise Ratio) yog qhov piv ntawm cov teeb liab muaj txiaj ntsig rau lub suab nrov tsis muaj zog.
Nws yog qhov piv ntawm cov teeb liab muaj txiaj ntsig lub zog rau lub suab nrov tsis xav tau. Nquag, txij li lub hwj chim yog qhov ua haujlwm ntawm qhov tam sim no thiab qhov hluav taws xob, lub teeb liab-rau-lub suab nrov piv kuj tuaj yeem suav nrog cov nqi hluav taws xob, piv txwv li, qhov piv ntawm cov teeb liab theem mus rau theem suab nrov, nrog rau cov qauv sib txawv me ntsis. Xam cov teeb liab-rau-suab nrov piv nrog lub hwj chim qaum teb tus nqi: S/N=10 log Xam lub teeb liab-rau-nrov piv nrog qhov voltage: S/N=10 log Raws li lub teeb liab-rau- suab nrov piv thiab lub hwj chim los yog voltage mus rau hauv ib tug logarithmic kev sib raug zoo, los txhim kho lub teeb liab-rau-suab nrov piv, ces nws yog ib qho tsim nyog yuav tsum tau txhim kho cov txiaj ntsig zoo thiab qhov sib piv ntawm tus nqi suab nrov, piv txwv li, thaum lub teeb liab-rau-suab nrov piv. ntawm 100dB, qhov tso zis hluav taws xob yog 10,{16}} zaus lub suab nrov rau cov hluav taws xob circuits, qhov no tsis yog ib qho yooj yim ua. Qhov no tsis yog ib txoj haujlwm yooj yim ntawm cov khoom siv hluav taws xob. Humidity Sensor Probe , , Stainless Steel Heaters PT100 Sensor , , Cast Aluminium Rhaub , Cua sov Coils Fluid Solenoid li qub
Yog hais tias lub amplifier muaj lub teeb liab-rau-suab nrov piv, nws txhais tau hais tias lub keeb kwm yav dhau yog nyob ntsiag to, thiab vim hais tias ntawm cov suab nrov tsawg, ntau cov ntsiab lus ntawm cov suab nrov tsis muaj zog npog los ntawm lub suab nrov yuav tshwm sim, uas ua rau muaj kev nce hauv ntab. tones, lub siab muaj zog ntawm huab cua, thiab nce nyob rau hauv dynamic ntau yam. Kev ntsuas ntawm lub amplifier lub teeb liab-rau-lub suab sib piv yog qhov zoo lossis qhov tsis zoo yam tsis muaj cov ntaub ntawv txiav txim siab nruj, feem ntau hais txog 85dB lossis ntau dua rau qhov zoo dua, hauv qab tus nqi no tuaj yeem ua tau nyob rau qee lub sijhawm mloog nrov, hauv cov suab paj nruag sib txawv hauv cov suab nrov pom tseeb. . Ntxiv nrog rau qhov sib piv ntawm lub teeb liab-rau-suab nrov, ntsuas lub suab nrov ntawm lub suab nrov tuaj yeem siv lub tswv yim ntawm lub suab nrov, uas yog qhov tseeb ntawm qhov ntsuas hluav taws xob los xam cov teeb liab-rau-nruab nrab tus nqi, tab sis tus denominator yog tus lej tas: { {9}}.775V, thaum tus lej yog lub suab nrov, yog li lub suab nrov thiab lub teeb liab-rau-nruab nrab piv, feem, yog: tus lej ntawm tus qub, qhov tom kawg yog tus lej txheeb ze.
Nyob rau hauv ntau cov khoom siv phau ntawv hauv cov lus qhia tshwj xeeb tom qab cov ntaub ntawv, feem ntau yuav muaj lo lus A, lub ntsiab lus A-qhov hnyav, uas yog, qhov hnyav, qhov hnyav txhais tau hais tias ib qho nqi raws li qee cov cai uas ntsuas qhov tseem ceeb ntawm kev hloov kho, vim yog tib neeg pob ntseg yog tshwj xeeb tshaj yog rhiab heev rau nruab nrab zaus, yog li yog hais tias lub amplifier nyob rau hauv nruab nrab-frequency band teeb liab-rau-suab nrov piv yog loj txaus ces, txawm hais tias lub teeb liab-rau-suab nrov piv nyob rau hauv lub low-frequency band thiab high-frequency. zaus bands me ntsis qis dua tias tib neeg pob ntseg tsis yooj yim rau kev ntes. Nws tuaj yeem pom tau tias yog qhov ntsuas-rau-lub suab sib piv yog ntsuas los ntawm kev ntsuas qhov hnyav, tus nqi yuav siab dua yog tias tsis siv qhov hnyav. Nyob rau hauv cov ntaub ntawv ntawm A-qhov hnyav, tus nqi yuav siab dua qhov tsis muaj qhov hnyav.
Tsis tas li ntawd: txhawm rau simulate tib neeg pob ntseg hnov ntawm ntau zaus muaj qhov sib txawv, hauv lub suab ntsuas ntsuas tau nruab nrog lub peev xwm simulate cov yam ntxwv ntawm lub pob ntseg ntawm tib neeg lub pob ntseg, cov teeb liab hluav taws xob raug kho kom kwv yees tus nqi ntawm lub network nrog. lub auditory sensation, lub network no hu ua qhov hnyav network. Lub suab siab ntsuas ntsuas los ntawm qhov hnyav network tsis yog lub hom phiaj lub suab lub suab siab theem (hu ua linear sound pressure level), tab sis lub suab siab kho los ntawm kev hnov lus, hu ua qhov hnyav suab los yog suab nrov.
Qhov hnyav network feem ntau muaj peb hom A, B, C. A hnyav suab qib yog simulate tib neeg pob ntseg ntawm cov yam ntxwv zaus ntawm cov suab nrov qis qis qis dua 55dB, B hnyav suab qib yog simulate cov yam ntxwv zaus ntawm nruab nrab-siv. Lub suab nrov ntawm 55dB txog 85dB, thiab C hnyav suab qib yog simulate cov yam ntxwv zaus ntawm lub suab nrov nrov. Qhov sib txawv tseem ceeb ntawm peb yog qhov degree ntawm attenuation ntawm qhov tsawg zaus ntawm lub suab nrov, A attenuation ntawm feem ntau, ua raws li B, C yam tsawg kawg nkaus. Ib qib suab nrov vim nws cov yam ntxwv nkhaus yog ze rau lub suab nrov ntawm tib neeg pob ntseg, yog li nws yog lub ntiaj teb kev ntsuas suab nrov hauv daim ntawv thov ntawm ntau yam B, C tau maj mam tsis siv.
Lub suab nrov nyeem los ntawm lub suab ntsuas ntsuas yuav tsum qhia qhov ntsuas qhov ntsuas, xws li chav tsev ntawm dB, thiab kev siv lub network A-qhov hnyav, nws yuav tsum tau sau tseg ua dB (A).
