Infineon’s MEMS Microphone Revolutionizes Cabin Noise Cancellation

Infineon has introduced a new automotive-qualified MEMS microphone with an analog interface, perfect for audio and active noise cancellation (ANC) systems in vehicles. ANC systems help keep the car interior quiet, offering passengers a more relaxed driving experience. Plus, they’re more efficient than traditional noise reduction methods because they reduce vehicle weight.

Infineon is expanding its automotive microphone lineup with the Xensiv IM68A130A MEMS microphone, which boasts a flat frequency response down to below 10Hz. This new microphone builds on the earlier IM67D130A, the company’s first automotive-qualified digital MEMS microphone, leveraging Infineon’s extensive automotive and technical expertise in high-end MEMS microphones.

The IM68A130A features a flat frequency response, stable phase response, and a low frequency roll-off at 10Hz. Its impressive 68dB(A) signal-to-noise ratio and 130dB SPL acoustic overload point enhance speech performance, making it ideal for a variety of audio systems. It’s also suitable for beamforming and ANC, where microphones are strategically placed in or outside the cabin to detect noise. These systems then generate an inverted sound wave through speakers to reduce cabin noise levels.

The microphone is AEC-Q103-003 qualified, which minimizes the effort and risk of failure during module and system qualification. It’s designed to last as long as the typical vehicle lifecycle, saving on design and development efforts. Additionally, with an operating temperature range up to +105°C, it can be used flexibly in different environments inside and outside the vehicle.