Study of the effects of long-term exposure to noisy air conditioners on hearing acuity

This study included 100 persons who have been exposed to noise levels emitted from compact air conditioners units in closed places for long periods reached up to 21 years. Results obtained denoted that persons only exposed to compact air conditioners units showed a very slight higher [0.6%] hearing impairment than the corresponding 62 control subjects. On the other hand, impairment of hearing was [2.4%] among subjects used to listen at the same time the other noisy equipments, and aged 50 years and over