High performance XENSIV™ MEMS microphone with ultra high dynamic range Infineon's XENSIV™ analog MEMS microphone, IM73A135, sets a new performance benchmark with a best-in-class SNR of 73 dB and high acoustic overload point of 135 dBSPL. Sealed Dual Membrane (SDM) MEMS technology provides high IP57 ingress protection at a microphone level. The IM73A135 achieves superior audio performance, previously only achievable by ECMs while harnessing the advantages of MEMS technology.