Active Noise Cancellation (ANC) ensures a quiet vehicle interior and provides passengers with a more relaxed driving experience. Furthermore, using advanced ANC solutions instead of passive damping methods significantly reduces the vehicle weight, which benefits vehicle efficiency.
After a successful launch of the first automotive qualified MEMS microphone in the market, the IM67D130A, Infineon is now enlarging its automotive microphone portfolio on the analog side, offering to the market the IM68A130A.
The new IM68A130A XENSIV MEMS microphone from Infineon features a flat frequency response, a stable phase response, and a very low frequency roll-off (LFRO = 10Hz). The high signal-to-noise ratio (SNR = 68dB(A)) and great acoustic overload point (AOP = 130 dBSPL) provide excellent speech performance, making it a perfect product for general-purpose microphones in any audio system. It can also be used for beamforming and ANC, where microphones are strategically placed in the cabin or at exterior locations to detect sounds in the cabin. An inverted sound wave is then generated through the audio speakers to reduce the sound level in the cabin.
Infineon’s new microphone is qualified according to the AEC-Q103-003 standard, which meets the requirements of the automotive industry. This helps to reduce the effort and risk of failure in module and system qualification. The product will be available for at least the typical lifecycle of a vehicle, enabling savings in design-in effort and the development of platform solutions. In addition, its extended operating temperature range of up to +105°C allows for flexible use in various application environments inside and outside the vehicle.
Potential applications for the new IM68A130A XENSIV MEMS microphone, apart from the mentioned Active Noise Cancellation (ANC/RNC) and voice control/beamforming systems, include also hands free calling/e-call, external sound sensing - sirens detection, and contact and road condition detection.
The XENSIV MEMS microphone IM68A130A can be ordered now. More information is available here.
Infineon will next launch its IM66D130A universal microphone is also suitable for ANC and voice applications, with a high SNR, AOP and low LFRO, with a digital PDM (pulse density modulation) interface. A solution that can be very easily integrated into multi-microphone systems based on the A²B bus.
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