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INSTRUMENT MICROPHONE Microphone Type: Dynamic Polar Pattern: Cardioid (unidirectional) Frequency Response: 30 to 13,000 Hz Polarity: Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of microphone output connector Output Impedance (at 1000 Hz): 350 ohms Sensitivity (at 1000 Hz): -55 dBV/Pa, (1.8 mV), 1 Pascal=94 dB SPL Electromagnetic Hum Sensitivity: 25 dB equivalent SPL in a 1 millioersted eld (60 Hz)