Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Experiments in Filtered X-LMS Algorithm for Active Noise Control in Ducts
Submission Author:
Renan Benitz , RS , Brazil
Co-Authors:
Renan Benitz, Herbert Gomes
Presenter: Herbert Gomes
doi://10.26678/ABCM.COBEM2019.COB2019-1991
Abstract
Prolonged exposure to noise can cause problems related to hearing health, resulting in a deficit in attention and eventually work accidents. Ducts are important means of ventilation in the industry, even though they are also means of low-frequency airborne noise propagation. This article evaluates an active noise control system in ducts in order to actively attenuate the level of noise produced by a source. An experimental apparatus is developed as the initial prototype for a test rig of active noise control. A code was developed in MATLAB software language for microphone signal acquisition and speaker active control. In the end, noise graphs in frequency band spectrum with and without the active control system are presented. The proposed control system was able to attenuate sound pressure levels with a different performance that depend on the type of noise being controlled (multi-tone frequencies or narrow-band white noise).
Keywords
Active control, Acoustics, noise, Filtro XLMS, ducts
