Microphone Yumva

Sensitivite, ikigereranyo cya analog isohoka ya voltage cyangwa agaciro kasohotse muburyo bwa enterineti, nigipimo cyingenzi kuri mikoro iyo ari yo yose. Hamwe ninjiza izwi, ikarita iva mubice bya acoustic kugeza kubice byamashanyarazi bigena ubunini bwikimenyetso gisohoka mikoro. Iyi ngingo izaganira ku itandukaniro riri hagati yimikorere ya sensibilité hagati ya analog na mikoro ya digitale, uburyo bwo guhitamo mikoro nziza kuri porogaramu yawe, n'impamvu wongeyeho bike (cyangwa byinshi) byunguka rya digitale bishobora kuzamura umicrophone ikimenyetso.
igereranya na sisitemu
Microphone sensitivite isanzwe ipimwa hamwe na 1 kHz ya sine kumurongo wumuvuduko wijwi (SPL) wa 94 dB (cyangwa 1 Pa (Pa)). Ubunini bwikigereranyo cyangwa ibimenyetso bisohoka bya mikoro munsi yibi byinjira ni igipimo cya mikoro. Iyi ngingo ni imwe gusa mubiranga mikoro kandi ntabwo ihagarariye imikorere ya mikoro yose.
Ibyiyumvo bya mikoro igereranya biroroshye kandi ntibyoroshye kubyumva. Iyi metric muri rusange igaragarira mubice bya logarithmic dBV (decibels ugereranije na 1 V) kandi byerekana volt ya signal yasohotse kuri SPL runaka. Kuri mikoro isa, ibyiyumvo (bigaragarira mubice byumurongo mV / Pa) birashobora kugaragazwa muburyo bwa decibels:
Hamwe naya makuru hamwe ninyungu ibanziriza inyungu, biroroshye guhuza urwego rwa signal ya mikoro kurwego rwo kwinjiza urwego rwumuzunguruko cyangwa ikindi gice cya sisitemu. Igishushanyo 1 kirerekana uburyo bwo gushyiraho mikoro ya mikoro isohoka (VMAX) kugirango ihuze na ADC yuzuye yuzuye yinjira (VIN) hamwe ninyungu za VIN / VMAX. Kurugero, hamwe ninyungu ya 4 (12 dB), ADMP504 ifite ingufu nini zisohoka zingana na 0.25 V zirashobora guhuzwa na ADC hamwe na nini yuzuye ya voltage yinjiza ya 1.0 V.