Silencer with tunable resonators for active noise control

Olivier Cherrier (1) , Valérie Pommier-Budinger (2)

1 ICA - Institut Clément Ader
2 DMIA - Département de Mathématiques, Informatique, Automatique

The article deals with active noise control and presents a silencer made of tunable acoustic resonators to reduce variable tonal noises. The silencer is composed of baffles with acoustic resonators made of two superposed and identically perforated plates associated with cavities. One of the plates is mobile and its displacement is controlled by an electromechanical system, allowing changing the internal shapes of the holes of the perforated layers. Consequently the impedance of the resonators and their resonance frequencies can be controlled. These tunable resonators can be used for noise control of variable tonal noises such as those generated by fans for example. The advantages of the proposed system are the simplicity of the actuation and the compactness of the system.

Mots clés: Acoustic impedance; Holes profiles; Active noise control; Resonators

Domaines: Acoustique [physics.class-ph]

Olivier Cherrier, Valérie Pommier-Budinger. Silencer with tunable resonators for active noise control. ESDA2012 - ASME 2012 11th Biennial Conference On Engineering Systems Design And Analysis, Jul 2012, Nantes, France. pp.1-6. ⟨hal-01853075⟩