ST’s MEMS microphones have internal metal shielding that creates a Faraday cage around the sensor and the IC, resulting in excellent EMI performance. On this slide, the upper left picture shows the what the internal shielding in ST’s MEMS mics would look like with the other package material removed. The lower left image shows the simulated EMI performance of ST’s MEMS microphone packaging. The red areas indicate high external electromagnetic fields, while the blue areas show the low EM field strength inside the microphone itself. The graph on the right shows how ST’s radiated susceptibility compares with the competitors, and one customer’s requirements, indicated by the red line. The blue line shows ST’s performance, while the orange and purple lines shows the performance of microphones from two competitors which have metal lids. The two things to notice are the radiated susceptibility of ST’s microphones is about the same as the competitors with metal lids, and the performance of ST’s mic exceeds the customer limit requirements by more than 15dB. This graph shows the requirements for one major customer, but the requirements for other large customers are similar.