Auris Nasus Larynx. 2021 Mar 18:S0385-8146(21)00080-8. doi: 10.1016/j.anl.2021.03.005. Online ahead of print.
ABSTRACT
OBJECTIVE: The purpose of this study was to determine better- ear listening effect on spatial separation with the N1-P2 complex.
METHODS: Twenty individuals with normal hearing participated in this study. The speech stimulus /ba/ was presented in front of the participant (0°). Continuous Speech Noise (5 dB signal-to-noise ratio) was presented either in front of the participant (0°), left-side (-90°), or right-side (+90°). N1- P2 complex has been recorded in quiet and three noisy conditions.
RESULTS: There was a remarkable effect of noise direction on N1, P2 latencies. When the noise was separated from the stimulus, N1 and P2 latency increased in terms of when noise was co-located with the stimulus. There was no statistically significant difference in N1-P2 amplitudes between the stimulus-only and co-located condition. N1-P2 amplitude was increased when the noise came from the sides, according to the stimulus-only and co-located conditions.
CONCLUSION: These findings demonstrate that the latency shifts on N1-P2 complex explain cortical mechanisms of spatial separation in better-ear listening.
PMID:33745789 | DOI:10.1016/j.anl.2021.03.005
