  In this work we present an integrated photogrammetric-acoustic technique
that, together with the construction of a scaled wind tunnel, allows us to
experimentally analyze the permeability behavior of a new type of acoustic
screens based on a material called sonic crystal. Acoustic screens are devices
used to reduce the noise, mostly due to the communication infrastructures, in
its transmission phase from the source to the receiver. The main constructive
difference between these new screens and the classic ones is that the first
ones are formed by arrays of acoustic scatterers while the second ones are
formed by continuous walls. This implies that, due to their geometry, screens
based on sonic crystals are permeable to wind and water, unlike the classic
ones. This fact may allow the use of these new screens in sandy soils, where
sand would pass through the screen avoiding the formation of sand dunes that
are formed in classic screens and drastically reduce their acoustic
performance. In this work, the movement of the sand and the resulting acoustic
attenuation in these new screens are analyzed qualitatively comparing the
results with those obtained with the classic ones, obtaining interesting
results under the acoustic point of view
