Centre Scientifique Et Technique Du Batiment

Centre Scientifigue Et Technique Du Batiment

Jacques Roland

Laurent Gagliardini

Pascal Bouvet

Acoustic attenuation device with active double wall

An active double wall comprises two parallel plates defining a rectangular space. Four sensors are positioned between the plates so as to detect noises in said space, and four actuators are place between the plates to emit counter-noises in the space. The actuators are phase-controlled by a control unit in order to minimize the sum of the outputs of the sensors. The actuators are respectively positioned at the centers of the sides of the rectangular space, and the sensors are each positioned on a respective long side of the rectangular space at a distance of one quarter of the length of a long side with respect to a respective corner of the rectangular space, or vice-versa.

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Corenc, France

Jacques Roland