Therefore, it should be guaranteed that, in school buildings of this type sound levels are not
detrimental to learning activities. Harmful effect is produced
on the students and lecturers due to long exposure to higher
noise levels. It is well known that higher sound levels have a
negative effect on the extra-auditory systems with physical
consequences (quickened pulse, increase in blood pressure,
constriction of blood vessels, etc.) and psychical consequences
(nervousness, mental fatigue and emotional frustration,
low productivity etc) in some individuals. These effects
occur especially with noise levels above 80db and are dependent
on the intensity, the distance to the source, the total
duration of the noise, the age of the individual and his/her
physical condition and sensitivity [50, 51].