Toyota employs noise-canceling tech on hybrid

Toyota has taken the principle behind noise-canceling headphones and applied it to its Toyota Crown Hybrid. The company’s ‘Active Noise Control’ system uses three microphones located on the roof of the interior of the car to detect the muffled noise of the engine and then generates antiphase signals from three speakers – two located on the right and left front doors and one rear woofer on the rear shelf – to counter the noise. The system, which was implemented after the car’s engine was found to be noisier than expected, reduces the interior engine noise by about 5 to 8dB, the company said.

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