Search Results - "Aurégan, Yves"

Ultra-thin low frequency perfect sound absorber with high ratio of active area by Aurégan, Yves

“…A concept of an ultra-thin low frequency perfect sound absorber is proposed and demonstrated experimentally. To minimize non-linear effects, a high ratio of…”
Get full text

On the use of a stress–impedance model to describe sound propagation in a lined duct with grazing flow by Aurégan, Yves

“…With flow, the acoustic effect of a locally reacting lined wall cannot be described by a single quantity independent of the incident wave, such as a wall…”
Get full text

PT-Symmetric Scattering in Flow Duct Acoustics by Aurégan, Yves, Pagneux, Vincent

“…We show theoretically and experimentally that the propagation of an acoustic wave in an airflow duct going through a pair of diaphragms, with equivalent…”
Get full text

Loss-induced modal selection by a resistive wiremesh by Kuznetsova, Svetlana, Aurégan, Yves, Pagneux, Vincent

“…This work examines the impact of local losses produced by a resistive wiremesh on the modes of an acoustic cavity. In the one-dimensional case, we demonstrate…”
Get full text

Experimental investigation of an Autler-Townes resonator with flow by Aurégan, Yves

“…The acoustic behavior of a double annular resonator with flow is studied as a special case to illustrate the possibilities, but also the difficulties, offered…”
Get full text

Sound attenuation optimization using metaporous materials tuned on exceptional points by Xiong, Lei, Nennig, Benoit, Aurégan, Yves, Bi, Wenping

“…A metamaterial composed of a set of periodic rigid resonant inclusions embedded in a porous lining is investigated to enhance the sound attenuation in an…”
Get full text

Slow sound in lined flow ducts by Aurégan, Yves, Pagneux, Vincent

“…The acoustic propagation in lined flow duct with purely reactive impedance at the wall is considered. This reacting liner has the capability to reduce the…”
Get full text

In-parallel resonators to increase the absorption of subwavelength acoustic absorbers in the mid-frequency range by Aurégan, Yves, Farooqui, Maaz

“…The acoustic effects of in-parallel resonators is compared to the behavior of a classical single degree of freedom resonator for which the resistance and the…”
Get full text

Acoustic of a perforated liner with grazing flow: Floquet-Bloch periodical approach versus impedance continuous approach by Dai, Xiwen, Aurégan, Yves

“…The effect of a shear flow on an acoustic liner consisting of a perforated plate backed by cavities is studied. Two different approaches are investigated:…”
Get full text

Frozen sound: An ultra-low frequency and ultra-broadband non-reciprocal acoustic absorber by Maddi, Anis, Olivier, Come, Poignand, Gaelle, Penelet, Guillaume, Pagneux, Vincent, Aurégan, Yves

“…The absorption of airborne sound is still a subject of active research, and even more since the emergence of acoustic metamaterials. Although being…”
Get full text

Experimental study of plane wave propagation in a corrugated pipe: Linear regime of acoustic-flow interaction by Golliard, Joachim, Aurégan, Yves, Humbert, Thomas

“…Acoustic propagation in corrugated pipes offers interesting features in presence of a mean flow, which are investigated experimentally in this paper. The…”
Get full text

Flexural instability and sound amplification of a membrane-cavity configuration in shear flow by Dai, Xiwen, Aurégan, Yves

“…The scattering of sound by a membrane-covered cavity in a duct with shear flow is calculated with a linear model based on the multimodal method. The model is…”
Get full text

Effect of turbulent eddy viscosity on the unstable surface mode above an acoustic liner by Marx, David, Aurégan, Yves

“…Lined ducts are used to reduce noise radiation from ducts in turbofan engines. In certain conditions they may sustain hydrodynamic instabilities. A local…”
Get full text

Slow sound laser in lined flow ducts by Coutant, Antonin, Aurégan, Yves, Pagneux, Vincent

“…This work considers the propagation of sound in a waveguide with an impedance wall. In the low frequency regime, the first effect of the impedance is to…”
Get full text

Anomalous transmission through periodic resistive sheets by Coutant, Antonin, Aurégan, Yves, Pagneux, Vincent

“…This work investigates anomalous transmission effects in periodic dissipative media, which is identified as an acoustic analogue of the Borrmann effect. For…”
Get full text

Particle image velocimetry measurement of an instability wave over a porous wall in a duct with flow by Alomar, Antoni, Aurégan, Yves

“…The flow in a rectangular channel lined with a porous material and acoustically excited with an upstream loudspeaker has been investigated using particle image…”
Get full text

Linear investigation of sound-flow interaction along a corrugated plate by D’Elia, Massimo E., Humbert, Thomas, Aurégan, Yves

“…The experimental investigation of the aeroacoustic behavior of a corrugated plate with small cavities in presence of a grazing flow is discussed. In…”
Get full text

Non-reciprocal scattering in shear flow by Saverna, Charlotte, Aurégan, Yves, Pagneux, Vincent

“…This work presents a study of scattering phenomena in shear flows and its application to impedance walls. These flows are described by a dimensionless shear…”
Get full text

Fano resonance scatterings in waveguides with impedance boundary conditions by Xiong, Lei, Bi, Wenping, Aurégan, Yves

“…The resonance scattering theory is used to study the sound propagation in a waveguide with a portion of its wall lined by a locally reacting material. The…”
Get full text

Failure of the Ingard-Myers boundary condition for a lined duct: An experimental investigation by Renou, Ygaäl, Aurégan, Yves

“…This paper deals with experimental investigation of the lined wall boundary condition in flow duct applications such as aircraft engine systems or automobile…”
Get full text