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