Estimación de la absorción acústica de paneles fabricados con neumáticos reciclados

Abstract

The present study is conducted to characterize

multilayer acoustic panels made from recycled

tire rubbers (GTR’s) in order to determine the

sound absorption characteristics of these new

materials for different applications, trying to

give an answer to the environmental problem

generated by this waste. This waste is currently

used as modifier of asphalt, sport surfaces,

molded and calendered products.

The article is a first step to evaluate the sound

absorption of these new multilayer panels for

application in fields such as noise barriers, noise

of machinery and equipment, conditioning

acoustic enclosures, etc..

Basically two types of products can be obtained

from the waste of the tyres: fibers and rubbers.

Two types of multilayer panels of thickness 10

mm and 20 mm have been made for a three

layer disposition: rubber-fibre-rubber. Then,

the standing wave tube method has been used

to determine the sound absorption in these

materials. For rubber there are 0,7 mm and

2,2-4 mm granulometry. The results show that

multilayer panels made of 2,2-4 granulometry

present a higher acoustic absorption in the

studied frequency range (400-3500 Hz). By

increasing the thickness of the panel, the

sound absorption coefficient is higher and the

multilayer panel increases its sound absorption by

adding more percentage of rubber.