Implementation of Interior Noise Control System Using Digital Adaptive Filter for On-Road Car Applications

Abstract

There is a tremendous progress in last 3 decades in Automotive engineering especially in fuel-injection, exhaust Gas treatment, and safety and comfort systems. Around 90% of innovations in the motor vehicle are due to the use of Electronics and Microprocessor controlled systems. Noises that arise due to various factors like engine exhaust, tire-road interaction and vibration due to air inside a passenger car contributes to interior noise inside the cabin. These noises should be attenuated for smooth in-car riding experience. This paper highlights the various sources of interior noise inside a car and the passive and active control strategies to minimize them. This paper proposes an Active Noise Control system with modified FxLMS algorithm approach using Digital Adaptive Filter which is stable and fast convergent in a real-time changing environment to minimize the interior noise inside the car cabin. The proposed Noise Control System is simulated using MATLAB environment and the Noise Control Implementation is done using ARM Cortex-M4 processor and various parameters are discussed through proven comparative results. The real time noises that occurs inside the car cabin gets reduced in the range of 3–13 dB depending on the road surfaces and use of microphones.