eng. Maurizio Zippo



 ● La Pelota - Milan

 ● Università Milano - Bicocca

 ● Club House

 ● Sala regia

 ● Prove di laboratorio

 ● Chiesa di San Rocco



Reduction of noise generated by HACV plants installed on the buildings of the “Università degli Studi Milano-Bicocca”
HACV plants (Heating, Air Conditioning and Ventilation) installed on the roof of the sections of the “Università degli Studi Milano-Bicocca” generated disturbing noise that propagates into the neighbouring residential buildings. The situation of acoustical pollution was made very complex for the peculiar characteristics of the noise sources and receptors. HVAC systems installed on each building of the University Area were heterogeneous (as regards typology, mechanical size, working conditions), were located on a large area according to a very complex layout. Disturbed receptors were also large and heterogeneous, as regards placing relative to the noise sources and noise propagation phenomena involved. Experimental acoustical characterisation of HAVC system components, carried out by pressure and power sound measurements, allowed the identification of the primary and most important noise sources, as regards absolute noise levels and also plant layout and positions relative to the receivers.
Simultaneous noise immission measurements, performed in several residential houses and critical positions located into the areas near the plants, allowed the valuation of the single source contribution to the global noise level immission.
Experimental measurements allowed also identification of plant components that need to be treated for reducing generated noise to the standard rated values.
Ray-tracing based numerical code was used for the simulation of the generated acoustical field and for the predictive valuation and optimisation of corrective actions.