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The effect of presentation level on spectrotemporal modulation detection

View ORCID ProfileSara Magits, View ORCID ProfileArturo Moncada-Torres, Lieselot Van Deun, View ORCID ProfileJan Wouters, View ORCID ProfileAstrid van Wieringen, View ORCID ProfileTom Francart
doi: https://doi.org/10.1101/450957
Sara Magits
aKU Leuven - University of Leuven, Dept. of Neurosciences, ExpORL, Herestraat 49, Bus 721, 3000 Leuven, Belgium
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Arturo Moncada-Torres
aKU Leuven - University of Leuven, Dept. of Neurosciences, ExpORL, Herestraat 49, Bus 721, 3000 Leuven, Belgium
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Lieselot Van Deun
aKU Leuven - University of Leuven, Dept. of Neurosciences, ExpORL, Herestraat 49, Bus 721, 3000 Leuven, Belgium
bDepartment of Otorhinolaryngology, Head and Neck Surgery, University Hospitals Leuven, Leuven, Belgium
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Jan Wouters
aKU Leuven - University of Leuven, Dept. of Neurosciences, ExpORL, Herestraat 49, Bus 721, 3000 Leuven, Belgium
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Astrid van Wieringen
aKU Leuven - University of Leuven, Dept. of Neurosciences, ExpORL, Herestraat 49, Bus 721, 3000 Leuven, Belgium
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Tom Francart
aKU Leuven - University of Leuven, Dept. of Neurosciences, ExpORL, Herestraat 49, Bus 721, 3000 Leuven, Belgium
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  • For correspondence: tom.francart@kuleuven.be
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Abstract

The understanding of speech in noise relies (at least partially) on spectrotemporal modulation sensitivity. This sensitivity can be measured by spectral ripple tests, which can be administered at different presentation levels. However, it is not known how presentation level affects spectrotemporal modulation thresholds. In this work, we present behavioral data for normal-hearing adults which show that at higher ripple densities (2 and 4 ripples/oct), increasing presentation level led to worse discrimination thresholds. Results of a computational model suggested that the higher thresholds could be explained by a worsening of the spectrotemporal representation in the auditory nerve due to broadening of cochlear filters and neural activity saturation. Our results demonstrate the importance of taking presentation level into account when administering spectrotemporal modulation detection tests.

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Posted October 24, 2018.
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The effect of presentation level on spectrotemporal modulation detection
Sara Magits, Arturo Moncada-Torres, Lieselot Van Deun, Jan Wouters, Astrid van Wieringen, Tom Francart
bioRxiv 450957; doi: https://doi.org/10.1101/450957
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The effect of presentation level on spectrotemporal modulation detection
Sara Magits, Arturo Moncada-Torres, Lieselot Van Deun, Jan Wouters, Astrid van Wieringen, Tom Francart
bioRxiv 450957; doi: https://doi.org/10.1101/450957

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