MASTER ASSIGNMENT
Introduction
Many noise problems relate to sound that is propagated in ducts. Examples are noise in ventilation systems, but also noise propagating through the ear canal. Active noise control (ANC) has been considered long ago as a solution for low frequency noise in ducts. However, many issues are still not completely solved, such as robustness of the solution and complexity of the controller. The UT AMDA group works together with spinoff company NovioSound to develop a robust solution for next generation in-ear active noise control, aiming at noise reduction also at high frequencies.
Concept for ANC in ducts
The concept for this project is based on directional wave sensors. Initial computations have shown that such an approach, using a proper choice of cost function and input signals, could lead to controllers with a small number of coefficients, a small number of filters, and benefits for the size of the region of silence.
Project
The project involves realization of a concept for active noise control with experimental verification. The steps involved are:
- Realization of an accurate directional wave sensor
- Integrating the directional wave sensor and sources in the experimental duct
- Modeling in Comsol
- Prediction of the control result in Matlab using modeled data
- Prediction based on measured data from a setup at the AMDA lab
- Real-time implementation at the AMDA lab using Speedgoat hardware
Location: UT - AMDA
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