论文信息 - Self-adaptive broadband active sound control system

Self-adaptive broadband active sound control system

The principle and performance of a broadband active sound control system in an air-conditioning duct is described. The system presented, which is designed for industrial use, is self-adaptive thanks to a programmable digital filter. It is possible to obtain attenuations of between 20 and 25 dB over a frequency band from several tens of Hz up to the first transverse mode of the duct, the airflow rates being around 10 m/s. Its self-adaptive property means that fully equipped and preset sections can be built in the laboratory and can then be inserted on site in the same way as mufflers.

Alain Roure | A. Roure

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