Survey on Households and the Environment 
Classification by characteristics of the reference person
Percentage of dwellings whose residents have suffered problems with noise in their surroundings, by level of studies completed by the reference person 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,
Without studies,16.3,7.7,0.8,5.6,1.5,3.0,1.7,1.8,0.7,22.8,
Primary education or the equivalent,21.5,9.7,1.6,7.0,2.3,5.3,2.8,1.9,1.3,29.4,
Stage one secondary education,25.9,11.9,1.2,8.6,2.6,7.5,3.1,1.9,1.3,29.5,
Upper-secondary education,29.4,14.1,2.7,10.7,3.4,9.3,4.5,3.5,1.6,32.1,
Intermediate level-professional education,28.6,13.4,3.0,11.0,4.3,9.4,3.9,4.0,1.6,33.4,
Higher level -professional education,30.5,14.2,1.9,10.6,4.3,10.3,3.9,3.7,2.7,31.3,
1st cycle university studies,30.8,14.4,2.7,11.9,3.2,10.4,4.3,4.7,2.0,37.7,
2nd or 3rd cycle university studies,32.0,15.2,2.5,12.7,3.9,10.9,6.1,4.4,2.7,34.4,
Does not know/ Does not answer,21.9,21.9,.,.,.,21.9,21.9,.,.,.,
Notes:

.Data protected by statistical secrecy

1) (*) % over the total number of dwellings with noise problems
Source: National Statistics Institute