Modeling Pitch Perception With an Active Auditory Model Extended by Octopus Cells

Frontiers in Neuroscience

Frank Markus Klefenz²  Tamas Harczos³ 

[1] Auditory Neuroscience and Optogenetics Laboratory, German Primate Center, Goettingen, Germany;Fraunhofer Institute for Digital Media Technology, Ilmenau, Germany;Institut für Mikroelektronik- und Mechatronik-Systeme gGmbH, Ilmenau, Germany;

关键词: auditory modeling;    latency-phase coding;    inter-spike interval histogram;    time domain parameterization;    pitch;    pitch estimation;   

DOI  :  10.3389/fnins.2018.00660

来源: DOAJ

【 摘 要 】

Pitch is an essential category for musical sensations. Models of pitch perception are vividly discussed up to date. Most of them rely on definitions of mathematical methods in the spectral or temporal domain. Our proposed pitch perception model is composed of an active auditory model extended by octopus cells. The active auditory model is the same as used in the Stimulation based on Auditory Modeling (SAM), a successful cochlear implant sound processing strategy extended here by modeling the functional behavior of the octopus cells in the ventral cochlear nucleus and by modeling their connections to the auditory nerve fibers (ANFs). The neurophysiological parameterization of the extended model is fully described in the time domain. The model is based on latency-phase en- and decoding as octopus cells are latency-phase rectifiers in their local receptive fields. Pitch is ubiquitously represented by cascaded firing sweeps of octopus cells. Based on the firing patterns of octopus cells, inter-spike interval histograms can be aggregated, in which the place of the global maximum is assumed to encode the pitch.

【 授权许可】

Unknown