Open AccessAcross-Frequency Processing of Interaural Time and Level Differences in Perceived Lateralization
Author(s) -
Matthew J. Goupell,
Olga Stakhovskaya
Publication year - 2018
Publication title -
acta acustica united with acustica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.283
H-Index - 57
eISSN - 1610-1928
pISSN - 1861-9959
DOI - 10.3813/aaa.919217
Subject(s) - lateralization of brain function , audiology , uncorrelated , narrowband , psychology , acoustics , mathematics , physics , computer science , statistics , medicine , telecommunications
Interaural time and level differences (ITDs and ILDs) contribute to the localization of sound sources; however, reverberation or use of cochlear implants diminishes the role of ITDs. Intracranial lateralization was investigated in normal-hearing listeners using correlated or uncorrelated narrowband noises, where ITDs and/or ILDs from a typical headrelated transfer function were applied. Results showed that ITDs and ILDs contributed to lateralization for correlated noises. ILDs contributed to lateralization for uncorrelated noises. Frequency-dependent ITD and ILD weighting occurred. These data help understand the across-channel processing of ITDs and ILDs, particularly when ITDs may not be available to the listener.