Omnidirectional Back Electret Condenser Microphone Cartridge
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The Panasonic WM-60AX is a compact, electret condenser microphone capsule designed for general-purpose audio applications. It features a nominal open-circuit sensitivity of -44 ±3 dB (0 dB = 1 V/Pa, 1 kHz) and an operating voltage typically between 1.5V and 10V DC, with a standard operating voltage of 2V DC. The capsule exhibits an omnidirectional polar pattern, providing relatively uniform sensitivity across a wide range of incident sound angles. The WM-60AX is a two-terminal device, requiring external biasing circuitry for proper operation, typically a resistor connected between the DC supply and the capsule’s output. Frequency response is generally flat within the human voice range, though specific characteristics vary depending on the external circuitry. Note that the WM-60AX is a legacy component and is explicitly specified as not compliant with the Restriction of Hazardous Substances (RoHS) directive.