EXPERIMENTAL FITTING OF THE STRUCTURAL REVERBERATION TIME FOR DIFFERENT CONSTRUCTIVE SOLUTIONS

摘要

Noise transmitted by the sidewalls in buildings is an essential factor to consider when studying over all airborne sound insulation. To obtain the value of the vibration reduction index in order to know the acoustic behaviour of the construction as a whole, it is necessary to know the velocity difference and the structural reverberation time. In the Standard UNE EN 12354-1:2002 there are empirical equations for obtaining the structural reverberation time. On the other hand, in the Standard UNE-EN ISO 10848-1:2007 there is also a detailed procedure for calculating the velocity difference and the structural reverberation time. In this work, we compare the structural reverberation time calculated by 12354 and the structural reverberation time obtained by 10848. From this comparison, we readjusted the empirical equations with a fundamental parameter: the loss factor. It is concluded that the estimated does not reflect reality if we consider the same loss factor in all types of structure.