Kumverera kwa Maikolofoni

Sensitivity, chiŵerengero cha mphamvu ya analogi yotulutsa mphamvu kapena mtengo wotulutsa digito ku mphamvu yolowetsa, ndi metric yofunikira pa maikofoni iliyonse.Ndi zolowetsa zomwe zimadziwika, mapu kuchokera ku ma acoustic domain mayunitsi kupita ku mayunitsi amagetsi amatsimikizira kukula kwa chizindikiro chotulutsa maikolofoni.Nkhaniyi ifotokoza za kusiyana kwa kukhudzika pakati pa ma analogi ndi maikolofoni a digito, momwe mungasankhire maikolofoni yabwino kwambiri kuti mugwiritse ntchito, komanso chifukwa chiyani kuwonjezera pang'ono (kapena kupitilira) phindu la digito kumatha kukulitsamaikolofonindi chizindikiro.
analogi ndi digito
Kukhudzika kwa maikolofoni nthawi zambiri kumayesedwa ndi 1 kHz sine wave pamlingo wothamanga (SPL) wa 94 dB (kapena 1 Pa (Pa) kuthamanga).Kukula kwa analogi kapena chizindikiro chotulutsa digito cha maikolofoni pansi pa kusangalatsa kolowetsaku ndi muyeso wa kukhudzika kwa maikolofoni.Mfundo iyi ndi imodzi mwamakhalidwe a maikolofoni ndipo sikuyimira zonse zomwe maikolofoni amachitira.
Kukhudzika kwa maikolofoni ya analogi ndikosavuta komanso kosavuta kumvetsetsa.Metric iyi nthawi zambiri imawonetsedwa mu ma logarithmic unit dBV (ma decibel ogwirizana ndi 1 V) ndipo imayimira ma volts a siginecha yotulutsa pa SPL yoperekedwa.Kwa maikolofoni a analogi, kukhudzika (kowonetsedwa mu mizere mizere mV/Pa) kumatha kuwonetsedwa motsatana ndi ma decibel:
Ndi chidziwitsochi komanso kupindula koyenera kwa preamp, ndikosavuta kufananiza mulingo wa siginecha ya maikolofoni ndi mulingo wolowera wagawo kapena gawo lina ladongosolo.Chithunzi 1 chikuwonetsa momwe mungakhazikitsire voliyumu yapamwamba kwambiri ya maikolofoni (VMAX) kuti igwirizane ndi ma voltage a ADC's full-scale input voltage (VIN) ndi phindu la VIN/VMAX.Mwachitsanzo, ndi phindu la 4 (12 dB), ADMP504 yokhala ndi mphamvu yayikulu yotulutsa 0.25 V imatha kufananizidwa ndi ADC yokhala ndi voteji yamphamvu kwambiri ya 1.0 V.