High performance analog XENSIV™ MEMS microphone Infineon's XENSIV™ MEMS analog microphone IM70A135 is a compact high-performance microphone with a very high acoustic overload point of 135 dBSPL and a size of only 3.50 x 2.65 x 1.00 mm³. This microphone is based on Infineon's new Sealed Dual Membrane MEMS technology which delivers high ingress protection (IP57) at a microphone level. The small size makes this microphone especially suited for TWS earbud applications.