Difracción acústica por fachadas escalonadas y su aplicación a la arquitectura modernista: una aproximación de su protección acústica

Abstract

Buildings with stepped profiles, not only present aesthetical aspects including an increase of luminosity in narrow streets, but also may show better acoustical performances. These profiles may diminish the cannon effect and the noise pressure levels on the building façade, which in turn, may reduce intruding noise levels, inside such buildings.

The diffracted field due to every building dihedral is calculated starting from Pierce expressions, where Fresnel integrals has been substituted by Hutchings polynomials, obtaining a better approximation than Pierce’s. Besides, these polynomials are valid for all the argument values, avoiding the restrictions of the approximation suggested by Pierce.

This work shows both qualitatively as quantitatively some acoustical advantages of this kind of buildings comparing them with prismatic ones.