EM9745, EM9745P Omnidirectional Electret Condenser Microphone Sensitivity Directivity Impedance Current Consumption Standard Operation Voltage Sensitivity Reduction S/N Ratio Sensitivity Range 0dB = 1V/Pa. 1KHz Omnidirectional Low Impedance Max. 0.5mA 4.5V Within -3dB at 1.5V More than 60dB -34 ± 3dB, -36 ± 3dB,-38 ± 3dB, -40 ± 3dB, -42 ± 3dB, -44 ± 3dB Typical Frequency Response Curve: Schematic Diagrams: