Omnidirectional condenser microphone

Figure 2 illustrates the fundamental configuration of the acoustic and electrical systems of an ECM. The omnidirectional condenser microphone forms a capacitor... 

Thus, the output of the omnidirectional condenser microphone depends on the minute displacement Asound pressure Pq. The diaphragm displacement can be obtained by an equivalent circuit analysis in a lumped-parameter system as follows. 

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