Yuav ua li cas yog lub microphone Cheebtsam ntawm domestic suab theem ntsuas?
Qhov tau txais cov khoom ntawm lub suab ntsuas hauv tsev yog lub microphone. Nws converts lub teeb liab acoustic rau hauv hluav taws xob teeb liab. Tom qab amplification, filtering, attenuation, weighting and a certain degree of circuit damping, it can provide aquantitative measurement of the measured sound according to four standard binning rules: ceev, qeeb, mem tes thiab tuav. Qhov taw qhia.
Lub microphone hloov lub suab mus rau hauv lub teeb liab hluav taws xob, thiab tom qab ntawd lub preamplifier hloov lub impedance kom phim lub microphone rau lub attenuator. Lub amplifier ntxiv cov teeb liab tso tawm mus rau qhov hnyav network, ua qhov hnyav ntawm lub teeb liab (lossis txuas lub lim sab nraud), thiab tom qab ntawd ua kom lub teeb liab mus rau qee qhov amplitude los ntawm lub attenuator thiab amplifier, thiab xa mus rau qhov ntsuas tus nqi zoo, uas. yog tso tawm kom pom ntawm qhov ntsuas ntsuas. Tus lej tus nqi ntawm lub suab nrov yog muab saum toj no.
Lub microphone yog ib qho khoom siv uas hloov cov suab nrov siab rau hauv cov cim hluav taws xob. Nws tseem hu ua microphone. Nws yog lub sensor ntawm lub suab ntsuas ntsuas. Cov microphones muaj xws li siv lead ua, electret, txav coil thiab condenser.
1. Lub txav coil microphone yog tsim los ntawm lub vibrating diaphragm, lub kauj txav txav tau, cov hlau nplaum ruaj khov thiab lub tshuab hloov pauv, thiab lwm yam. Suab qib ntsuas. Lub vibrating diaphragm pib vibrate tom qab raug lub suab yoj lub siab, thiab tsav lub movable coil ntsia nrog nws kom vibrate nyob rau hauv lub magnetic teb los tsim induced tam sim no. Qhov tam sim no hloov raws li tus nqi ntawm lub suab nthwv dej siab lub vibrating diaphragm raug rau. Qhov siab dua lub suab, qhov ntau dua qhov tam sim no generated; qhov qis dua lub suab siab, qhov me me tam sim no generated.
2. Lub condenser microphone feem ntau yog tsim los ntawm cov hlau diaphragm thiab cov hlau electrodes ze ze. Nws yog qhov tseem ceeb ntawm lub tiaj tus capacitor. Cov hlau diaphragm thiab cov hlau electrode yog ob daim hlau ntawm lub tiaj tus capacitor. Thaum lub diaphragm cuam tshuam los ntawm lub suab siab, lub diaphragm deforms, ua rau qhov kev ncua deb ntawm ob daim hlau hloov, yog li hloov lub capacitance. Lub voltage nyob rau hauv lub me me ntsuas Circuit Court kuj hloov, realizing lub functionality ntawm converting lub suab siab teeb liab mus rau ib tug voltage teeb liab. Condenser microphone yog lub microphone zoo tshaj plaws hauv kev ntsuas acoustic. Nws muaj qhov zoo ntawm qhov loj dynamic ntau, tiaj zaus teb, siab rhiab heev thiab zoo stability nyob rau hauv dav kev ntsuas ib puag ncig, yog li nws yog dav siv. Txij li cov zis impedance ntawm condenser microphone yog siab heev, impedance hloov dua siab tshiab yuav tsum tau ua los ntawm lub preamplifier. Lub preamplifier tau nruab rau hauv lub suab ntsuas ntsuas ze rau qhov chaw condenser microphone raug teeb tsa.
