ST advanced vibration sensor eliminates road noise and creates a quieter cabin for the era of electric vehicles | Heisener Electronics
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ST advanced vibration sensor eliminates road noise and creates a quieter cabin for the era of electric vehicles

Technology Cover
投稿日: 2022-10-19, STMicroelectronics

    STMicroelectronics has launched a new road-noise cancellation (RNC)MEMS sensor. The new product uses active noise-control (ANC) technology to reduce road noise and make the car more comfortable and quiet. In the past, engine performance, design and transmission were the three defining elements of a car; Now, drivers and passengers are increasingly focused on comfort.

      Electric vehicles (EVs) have the inherent advantage of being less noisy than gas-powered vehicles (ICE), and automakers are focusing on reducing the noise caused by wheels or vibration in the car to create a quieter environment for passengers to enjoy the ride. The noise reduction algorithm can measure the ambient sound with the sensor array installed everywhere in the vehicle, and reduce the vibration noise with the noise reduction waveform (reduction), so as to achieve the purpose of eliminating the vibration noise.

     "In today's digital age, to ensure a quieter cabin, a safer and more enjoyable journey, and to deal with excess noise in the car, it is smart to reduce noise rather than reduce it," said Simone Ferri, general manager of marketing for the MEMS sub-division of stmicroelectronics's Analog, MEMS and Sensor Products Division. With the transition to hybrid and electric vehicles, the impact of road noise on vehicles can be significant, and our AIS25BA accelerometer adds great value to system designers."

     With its capability in MEMS IC development, STmicro has given AIS25BA outstanding product characteristics and enhanced RNC system accuracy. The sensor has some of the lowest electrical noise on the market, helping automotive engineers achieve a quieter interior environment. On the other hand, it has the fast response/low latency required by the RNC system to compute the correction waveform in real time, and the high bandwidth required to capture interference over the entire audio range relevant to the application. The wide operating temperature range and mechanical resistance to denaturation allow sensors to be placed in the most hostile environments of today's vehicles: near the engine or drive motor, and near the wheels and suspension.