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 type of municipality and cause, and which 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	
Provincial capitals and municipalities with more than 100,000 inhabitants	31.4	14.2	2.6	12.7	3.6	9.9	4.8	4.2	2.5	31.8	
50,000 to 100,000 inhabitants	27.1	12.8	2.7	10.1	2.5	7.7	3.8	3.1	0.8	28.1	
20,000 to 50,000 inhabitants	23.3	10.9	1.6	7.2	2.6	6.3	2.8	1.6	0.9	31.0	
10,000 to 20,000 inhabitants	23.2	11.2	0.6	6.4	2.2	5.5	2.7	2.1	1.1	33.9	
Fewer than 10,000 inhabitants	13.5	6.7	0.8	3.0	1.9	3.2	1.6	0.9	0.6	27.2	
Notes:
1) (*) % over the total number of dwellings with noise problems
Source: National Statistics Institute