4th International E-Conference on Engineering, Technology and Management - ICETM 2021
Author(s) : E.A. Lara-AlemÃ¡n, F. SANDOVAL-IBARRA
Noise is a determining factor in stress-related ailments, and progressively affects the population's sense of hearing. In practice, because noise is typical of power-operated systems, its effect can be minimized if the power of the wave front is below the hearing threshold. That is a proposal commonly reported in the literature and with various variants is focused on designing the controlled alteration of the communication channel. The system thus developed is an active noise controller. In this contribution, experimental results show the feasibility of developing a channel controller using the TAdsp28335 card. With this proposal, two purposes were achieved: to develop a low-cost system, and to determine the requirements of the Active Noise Controller to develop optimal processing algorithms for real time operation. Experimental results show that the best solution is the FxLMS algorithm, with online estimation. It was observed that if the ANC system is excited with an electrical signal of 1.0Vpp, at a frequency of 100 Hz, the power of that signal is reduced by constructing an anti-signal, achieving a value of 220mVpp (which is equal to the intrinsic noise of the FxLMS algorithm), in 9s.