Omnidirectional Back Electret Condenser Microphone Cartridge WM-61A Small microphone for general use Back electret type designed for high resistance to vibrations, High sensitivity, high signal to noise ratio Solder type for leadwires Appearance Dimensional Drawing Unit : mm 3.4 6.0 Term.1 Output Term.2 Ground FET Impedance converter Typical Frequency Response Curve F Output +Vs 2.2k Ground Rel at i v e Res pons e [ dB] Schematic Diagram +20 +10 0 - 10 - 20 - 30 Mic Capsule 20 50 100 200 500 Fr equenc y Sensitivity 0dB=1V/Pa, 1kHz Sensitivity Model No. -35+/-4dB WM-61A Impedance Frequency Max operation voltage Standard operation voltage Current consumption Sensitivity reduction S/N ratio Specifications are subject to change without notice. 2k 5k [ Hz] Vs=2.0V RL=2.2k Specifications Dimensions 1k 6 x 3.4 mm Less than 2.2k Omnidirectional 20-16,000Hz 10V 2V Max 0.5mA Within -3dB at 1.5V More than 62dB 10k 20k