Acoustic isolation

Acoustic resistance of materials is associated with the right of weight. The heavier the construction material, the better it insulates and dampens sound. In the case of walls made of AAC, it turns out that the porous structure of AAC gives this material a bonus of 2-3 decibels with respect to acoustic resistance, enhancing the acoustic resistance of building partitions compared to the materials of the same weight.

Walls of AAC were tested at the Acoustics Department of the Building Research Institute. On the basis of laboratory tests and obtained indicators of acoustic resistance adjusted by 2 dB, design values of acoustic resistance indicators R_A1R and R_A2Rhave been specified_.

THE ONDICAYOR OF ACOUSTIC RESISTANCE ASSESSMENT assessment R_A1R i R_A2R [DB] FOT WALLS MADE OF BLOCKS DEPENDING ON THE WALL DENSITY AND THICKNESS CLASS INN ACCORDANCE WITH EN 20140-3

Density class	The value of single number ratios RA1R and RA2R [dB] for wall thickness without plaster [mm]
	R_A1R – for interior wall										R_A2R– for exterior wall
	75	100	115	150	175	200	240	300	365	420	75	100	115	150	175	200	240	300	365	420
350			-	-	37	-	-	-	45	-	-	-	-	-	34	-	-	-	41	-
400	-	-	-	-	38	-	41	44	46	47	-	-	-	-	35	-	38	40	42	44
500	31	35	-	39	-	42	-	-	-	-	30	33	-	36	-	39	-	-	-	-
600	-	-	37	-	43	-	46	48	50	-	-	-	35	-	39	-	42	45	47	-

R_A1R indicator refers to the internal partitions, since it is used to evaluate the partition’s resistance to a living noise, and the R_A2Rindicator refers to exterior partitions – it is used to evaluate the resistance of the partition to low-frequency (traffic) noise.