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Article dans une revue

Low frequency sound attenuation in a flow duct using a thin slow sound material

Abstract : A thin subwavelength material that can be flush mounted in a duct and that gives an attenuation band at low frequencies in air flow channels is presented. To decrease the material thickness, the sound is slowed in the material using folded side branch tubes. The impedance of the material is compared to the optimal value given by the Cremer condition, which can differ greatly from the air characteristic impedance. Grazing flow on this material increases the losses at the interface between the flow and the material.
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Article dans une revue
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https://hal.archives-ouvertes.fr/hal-02511741
Contributeur : Jean-Philippe Groby <>
Soumis le : jeudi 19 mars 2020 - 09:05:43
Dernière modification le : jeudi 4 mars 2021 - 15:29:40

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Yves Aurégan, Maaz Farooqui, Jean-Philippe Groby. Low frequency sound attenuation in a flow duct using a thin slow sound material. Journal of the Acoustical Society of America, Acoustical Society of America, 2016, 139 (5), pp.EL149-EL153. ⟨10.1121/1.4951028⟩. ⟨hal-02511741⟩

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