Survey on Households and the Environment 
Classification by characteristics of the dwelling
Percentage of dwellings whose residents have suffered problems with noise in their surroundings, by size of the dwelling (no. of persons occupying it) and cause, and that have taken some measure
Units: % over the total number of dwellings

	With a noise problem	Due to overland traffic	Due to air traffic	Due to neighbours	From animals	Mechanical causes (including construction)	Due to trade and recreational activities	Due to informal urban get-togethers (outdoor drinking)	Other causes	Have taken some measure against noise (*)	
TOTAL	25.1	11.7	1.9	8.9	2.8	7.3	3.5	2.8	1.5	31.0	
1-person dwelling	21.1	9.5	1.2	7.7	2.3	6.4	3.3	2.7	1.7	26.7	
2-person dwelling	25.0	11.6	1.6	9.0	2.5	6.7	3.7	2.8	1.2	32.3	
3-person dwelling	27.8	12.7	2.4	9.8	3.3	8.3	3.7	3.5	1.6	30.8	
Dwelling with 4 or more persons	25.3	12.2	2.2	8.7	3.1	7.5	3.2	2.3	1.8	32.0	
Notes:
1) (*) % over the total number of dwellings with noise problems
Source: National Statistics Institute