Abstract
Six audiometric procedures were administered to seventy patients divided into seven groups: normal, eighth nerve, brain stem, temporal lobe, non-auditory CNS, aphasic, and amyotrophic lateral sclerosis (ALS). Pure-tone sensitivity was equated among groups. For the eighth nerve group, performance was consistently poor for all measures. For the brain stem group, performance was consistently depressed for difficult monotic speech tasks. For the temporal lobe group, performance was most severely affected for difficult dichotic speech messages. For the aphasic group, performance was generally poor for both monotic and dichotic speech procedures. For the non-auditory CNS and ALS groups, results were normal. Inter- and intra-group variability were substantial.