Ultra-low noise high sensitivity digital XENSIV™ MEMS microphone Infineon's ultra-low noise digital XENSIV™ MEMS microphone, IM73D122, features high SNR and sensitivity for high-quality audio capturing in laptops, tablets, and conferencing devices. Based on Infineon's Sealed Dual Membrane (SDM) MEMS technology, it delivers high IP57 ingress protection. Perfect for voice user interface applications.