Experimental Study of New Insulation Lightweight Concrete Block Floor Based on Perlite Aggregate, Natural Sand, and Sand Obtained from Marble Waste

Table 8

Measuring principle of the sound reduction index R_W.

Measurement	Figure
The Omni Power sound source (S) and the sonometer are placed in the source room in order to measure the average sound pressure level L1
The sonometer was moved into the receiving room in order to measure the average sound pressure level L2
The source is brought back into the receiving room local for the measurement of the reverberation time Tr