Infineon-Reality AI Develops Vehicle Acoustic Solution
IM67D130A Microphone with Low THD and High AOP
Siren Recognition without Distortion in High-Noise Environments


Advanced driver assistance systems (ADAS) are based on technologies such as cameras, radar, and lidar, meaning the system can only perceive objects when they enter its field of view. However, emergency vehicles like ambulances can be recognized by sound long before entering the field of view of ADAS.

On the 25th, Infineon Technologies announced the development of an advanced sensing solution that grants automobiles acoustic capability in collaboration with Reality AI. This solution adds XENSIV™ MEMS microphones to existing sensor systems, enabling detection and warning of vehicles in blind spots that are invisible or emergency vehicles that are approaching but not yet visible.

The new sensing solution combines Infineon XENSIV 'IM67D130A' MEMS microphones with the AURIX™ MCU and Reality AI's automotive SWS (See-With-Sound) system. By applying machine learning algorithms, it can acoustically detect emergency vehicles or other vehicles before they enter the driver's field of view or are detected by ADAS sensors. It can recognize emergency vehicle siren sounds that vary by country.

The IM67D130A microphone operates at temperatures from –40°C to 105°C, enabling use for various applications in harsh automotive environments. Its low distortion (THD) and high acoustic overload point (AOP) of 130dB SPL capture audio signals without distortion in high-noise environments. It effectively captures siren sounds even amid severe background noise or wind noise. It can also be utilized for other applications such as road condition monitoring, damage detection, and predictive maintenance.

Reality AI's audio signal processing software uses the Infineon AURIX TC3x MCU product family. The product family offers ASIL-D functional safety according to ISO 26262 2018 standard and full EVITA cyber security with 1 to 6 cores and up to 16MB flash. The IM67D130A, supplied in a PG-LLGA-5-4 package, is currently available for order.