Lateralization of stimuli with alternating interaural time differences: The role of monaural envelope cues
| Autor: | Steven van de Par, Angela Josupeit, Mathias Dietz, Darrin K. Reed |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Acoustics and Ultrasonics Computer science Speech recognition Acoustics Interaural time difference Stimulus (physiology) Intelligibility (communication) Monaural Lateralization of brain function Amplitude modulation 03 medical and health sciences Noise 030104 developmental biology 0302 clinical medicine medicine.anatomical_structure Arts and Humanities (miscellaneous) medicine Auditory system Binaural recording 030217 neurology & neurosurgery |
| Zdroj: | The Journal of the Acoustical Society of America. 139:30-40 |
| ISSN: | 0001-4966 |
| DOI: | 10.1121/1.4938018 |
| Popis: | A temporally acute binaural system can help to resolve inherent fluctuations in binaural information that are often present in complex auditory scenes. Using a broadband noise stimulus that rapidly alternates between two different values of interaural time difference (ITD), the ability of the binaural system to hear the lateral position resulting from one of the ITD values was investigated. Results show that listeners are able to accurately lateralize brief noise tokens of only 3-7 ms in duration. In two subsequent experiments, the role of an amplitude modulation (AM) imposed on the ITD-switching stimulus used in the first experiment was tested. For wideband stimuli, the temporal position of the ITD target relative to the phase of the AM did not influence absolute lateralization or detection performance. When the stimuli were narrowband, however, detection of the ITD target was best when temporally positioned in the rising portion of the AM. These experiments illustrate that the auditory system is capable of making accurate lateral estimates of very brief moments of ITD information. Furthermore, for these instantaneous changes in ITD information, the stimulus bandwidth can influence the role of envelope cues for the readout of binaural information. |
| Databáze: | OpenAIRE |
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