Vortrag entfällt: Modeling Binaural Masking Release in Delayed Noise
* Presenting author
Abstract:
In complex listening enviroments, listeners can benefit form utilizing interaural differences to separate a signal from a masker. Differences in interaural phase configuration between a target and a masker can lead to substantial binaural masking release. This effect is decreased for interaurally delayed maskers. In case of several maskers with different interaural delay configurations binaural unmasking is further reduced (double-delayed noise, van der Heijden & Trahiotis 1999, JASA 105-1, pp. 388 – 399). This phenomenon could so far only be modeled employing internal delay compensation and a larger-than-monaural critical bandwidth. An alternative hypothesis states that detection in such conditions is impaired by lower interaural coherence in off-frequency regions (Marquardt & McAlpine 2009, JASA pp. EL177 - EL182). We developed this hypothesis into a multi-channel binaural processing model that involves an across-channel interaction mechanism. Combined with an energy detection pathway, the model accounts for the critical phenomena of binaural detection, including such with several interfering masker delays using monaural-like critical bandwidths and without assuming internal delay compensation.