psychological differentiation , psychophysiological arousal , hearing capacity , and ability to lipread unrelated sentences presented in a silent technicolor film were investigated in 62 children ( mean age 10 years , 4 months ) , classified into three hearing categories ( normal , mild to moderate hearing loss , severe hearing loss ) based on their average hearing threshold in the range of speech frequencies for their best ear .
C0018767
hearing
C0013443
ear