Article

Synchronization effects in the cochlea – a deviating view on auditory preprocessing (en)

* Presenting author
Day / Time: 08.03.2023, 09:40-10:00
Room: Saal Y5
Typ: Regulärer Vortrag
Abstract: Acoustic signals in the air are mechanically preprocessed by the inner ear before they are transformed into electric pulses to be processed by the brain. In the inner ear of mammals, the mechanical pre-processing shows a mapping of frequency to place, resulting in a frequency dependent location of the evoked mechanical oscillations. These oscillations in the healthy inner ear show nonlinear and active behaviour, thought to be essential for the properties of the auditory system.In this study, we investigate the role of the nonlinear phenomenon of entrainment and clustering in various models of the inner ear. This phenomenon is not considered in the most frequently used models of auditory processing and implicitly discarded in the analysis of experimental data in the frequency domain. Here we investigate properties underlying the clustering of entrained oscillators in models of the mechanical inner ear at various levels of abstraction. The results show that clustering is a robust phenomenon across all investigated models and consistent with experimental data. This complex phenomenon challenges filter-based models of the cochlea and the auditory nerve. The implications of these results for neural processing and perception are discussed.
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