This definitive guide covers the design and application of absorbers and diffusers in
acoustics. Surface diffusion is a relatively young subject area, and diffuser design …

Both naturally-occurring and man-made materials are often heterogeneous materials formed
of various constituents with different properties and behaviours. Studies are usually carried …

This article is devoted to the acoustical properties of hemp concrete, a “green” building
material. In the study, hemp concretes made of different binders and different kinds of …

This work presents benchmark examples related to the modelling of sound absorbing
porous media with rigid frame based on the periodic geometry of their microstructures. To …

At first glance, it seems that modern, inexpensive additive manufacturing (AM) technologies
can be used to produce innovative, efficient acoustic materials with tailored pore …

This article explores the applicability of numerical homogenization techniques for analyzing
transport properties in real foam samples, mostly open-cell, to understand long-wavelength …

This work investigates a porous composite with modifiable micro-geometry so that its ability
to absorb noise can be accommodated to different frequency ranges. The polymeric …

Acoustic wave propagation in porous composites is investigated in this paper. The two-scale
asymptotic homogenisation method is used to obtain the macroscopic description of sound …

Granular materials have been conventionally used for acoustic treatment due to their sound
absorptive and sound insulating properties. An emerging field is the study of the acoustical …

Acoustics of stiff porous media with open porosity can be very effectively modelled using the
so-called Johnson-Champoux-Allard-Pride-Lafarge model for sound absorbing porous …