3 papers
physics.class-ph2019
Slow sound laser in lined flow ducts
Antonin Coutant, Yves Aurégan, Vincent Pagneux
We consider the propagation of sound in a waveguide with an impedance wall. In the low frequency regime, the first effect of the impedance is to decrease the propagation speed of a…
physics.flu-dyn2018
Explicit approximation of the wavenumber for lined ducts
Maaz Farooqui, Yves Aurégan, Vincent Pagneux
For acoustic waves in lined ducts, at given frequencies, the dispersion relation leads to a transcendental equation for the wavenumber that has to be solved by numerical methods. B…
physics.class-ph2016
Low frequency sound attenuation in a flow duct using a thin slow sound material
Yves Auregan, Maaz Farooqui, Jean-Philippe Groby
We present a thin subwavelength material that can be flush mounted to a duct and which gives a large wide band attenuation at remarkably low frequencies in air flow channels. To de…