Across-channel processes can be modeled as energy subtraction or modulation interference

Evidence

In the monaural pathway the output of the adaptation loops was analysed by a modulation filterbank, where the highest centre frequency of the modulation filters was restricted to a quarter of the centre frequency of the auditory filter. … To simulate across-channel (AC) processes, two different versions of the monaural part of the model were used. The first version is based on the approach of Piechowiak et al. ( 2007 ). In this approach a weighted sum of modulation filters at the output of off-frequency auditory filters was subtracted from the corresponding modulation filters at the output of the on-frequency filter. … The second version of across-channel processing is based on the assumption that modulation in off-frequency auditory filters channels hampers the processing of the modulation filters tuned to the corresponding modulation frequency in the on-frequency auditory channel. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3478

Categorization

• DEFINE: Distinguishes the energy-based AC model from the modulation-based AC model, two competing mechanistic accounts of across-channel processing.