[Normal hearing, loss of hearing and general occupational disability].
A real, practical definition of normal hearing is an absolutely indispensable yardstick by which to measure the degree of general occupational disability attributed to reduced auditory capacity. If progressive impairment of the organ of Corti, due to age and non-occupational noise factors is also taken into account, a practical borderline between normal and reduced hearing can be defined as a mean bilateral threshold level for air conduction higher than 25 dB for the usual conversational frequencies, as per D.P.R. 1124/1965 and in accordance with ISO R/389/1964 and ANSI/1969. Suggestions are also put forward for the definition of general occupational disability.
Rossi
G
G
Istituto di Audiologia e Fonologia dell'Università di Torino.
D006309:Hearing; D006311:Hearing Disorders / Q000503:physiopathology*; D006801:Humans; D014938:Work Capacity Evaluation
Normoacusia, ipoacusia ed invalidità lavorativa generica.