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Molex unveils accelerometer-based, automotive noise-cancelling sensor

By Michelle Froese

Molex, a global connectivity and electronics solutions provider, has introduced an accelerometer-based, Road Noise Cancelling (RNC) sensor, the first product in a new family of automotive Active Noise Cancellation (ANC) sensors. These sensors will play a critical role in combatting unwanted road, wind and HVAC car noise while reducing low-frequency sounds that increase driver fatigue.

Molex’s durable, lightweight ANC sensor reduces road noise for a safer, more enjoyable driving experience.

Advancements in the electronics industry have enabled ANC technology, more commonly associated with high-end headphones, to transform how car manufacturers address road-based noises. Instead of installing expensive and heavy sound-absorbing materials to insulate car interiors from excessive road noise, ANC sensors are designed to be installed on a car’s chassis for more accurate and efficient results.

Devices mounted to wheel wells and car frames, however, must be built to withstand the harshest conditions.

“As the transition to electrified vehicles intensifies, it will become critical to reduce road noise, which today is masked by internal combustion engines,” said Carrieanne Piccard, VP and GM, Transportation Solutions Business Unit, Molex. “Our long history in the automotive industry uniquely positions Molex to develop powerful, durable sensor technology that captures and cancels road noises while enabling safe and enjoyable driving experiences.”

According to Molex’s recently commissioned “The Future of Automotive Survey,” nine in 10 new cars in 2030 will be hybrid or fully electric. In fact, respondents ranked electrification, connectivity and sensor technology among the most important innovations. They also cited the need for electronics and software to operate in extreme scenarios as a barrier to innovation.

Performance in harsh conditions
Molex’s family of ANC accelerometer and microphone sensors use Analog Devices’ Automotive Audio Bus® (A2B) technology to ensure delivery of high-fidelity audio while significantly reducing cabling complexity, costs and weight.

By pairing its sensors with the A2B network, Molex transmits noise signals to the processing unit in less than two milliseconds. The sensors include integral connectors and are daisy chained to simplify integration while providing up to a 30 percent reduction in cable weight. Derived from Molex’s Mini50 Connector family, these connectors offer up to 50 percent space savings over traditional USCAR 0.64 connectors.

Moreover, Molex’s sensors are available in different housings, including an IP6K9K enclosure, to ensure greater protection from harsh conditions while enabling placement closest to the road noise. Detecting the sound at its source speeds processing of the noise-canceling signal; A2B technology also allows a higher number of signals per chain to be processed.

Unlike other products on the market, Molex sensors are sensitive enough to measure and cancel road noise at slower vehicle speeds, giving designers greater flexibility in sensor placement while simplifying engineering.

“Analog Devices is pleased to collaborate with Molex to bring to market low-latency ANC / RNC sensors based on Analog Devices’ A2B network and MEMs accelerometer technologies,” said Vlad Bulavsky, senior director, Automotive Connectivity, Analog Devices, Inc. “We are already seeing early signs that the quality of Molex’s sensors together with A2B/ADXL317’s design simplicity is resonating with our mutual customer base.”


Filed Under: Components, News
Tagged With: molex
 

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