Objective To examine adult speech recognition for words presented in different background noise when the adults used 4-band tri-microphone and traditional tri-microphone hearing aid technology,and to examine the ability of sound location when using wireless remote control.Methods A total 40(female 29,male 11) subjects with moderate to severe bilateral sensorineural hearing loss were encountered in this test,and were divided into two groups(group A and group B).With binaural fitting ACURIS P(frequency specific tri-microphone adaptive mode) and Triano 3 P(Tri-microphone adaptive mode),the patients were tested with speech recognition in two sound field through PB test and the accurateness of sound localization were investigated through questionnaire.Results Significant differences were found between the mean L50(the S/N at which 50% of running speech is correctly understood) obtained from group A versus group B in Tri-microphone adaptive directional condition in multiple sound fields(P