The flanking sound reduction index can be estimated using the intensity technique according to the method described in the standard EN ISO 15186-2 Annex C, this procedure can give us the contribution of each path and of each flanking wall.
The EN ISO 10848-1 gives us the guidelines to measure with the vibration velocity technique. This paper reports the results of the comparison between the Intensity measurement technique and the Vibration velocity based method, to estimate the flanking sound transmission.
The measurements take place on a laboratory with particular conditions (two suppressed junctions) and in field conditions