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• W2945038412 startingPage "1924" @default.
• W2945038412 abstract "When we listen to speech, we have to make sense of a waveform of sound pressure. Hierarchical models of speech perception assume that, to extract semantic meaning, the signal is transformed into unknown, intermediate neuronal representations. Traditionally, studies of such intermediate representations are guided by linguistically defined concepts, such as phonemes. Here, we argue that in order to arrive at an unbiased understanding of the neuronal responses to speech, we should focus instead on representations obtained directly from the stimulus. We illustrate our view with a data-driven, information theoretic analysis of a dataset of 24 young, healthy humans who listened to a 1 h narrative while their magnetoencephalogram (MEG) was recorded. We find that two recent results, the improved performance of an encoding model in which annotated linguistic and acoustic features were combined and the decoding of phoneme subgroups from phoneme-locked responses, can be explained by an encoding model that is based entirely on acoustic features. These acoustic features capitalize on acoustic edges and outperform Gabor-filtered spectrograms, which can explicitly describe the spectrotemporal characteristics of individual phonemes. By replicating our results in publicly available electroencephalography (EEG) data, we conclude that models of brain responses based on linguistic features can serve as excellent benchmarks. However, we believe that in order to further our understanding of human cortical responses to speech, we should also explore low-level and parsimonious explanations for apparent high-level phenomena." @default.
• W2945038412 created "2019-05-29" @default.
• W2945038412 creator A5000252599 @default.
• W2945038412 creator A5011936459 @default.
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• W2945038412 date "2019-06-01" @default.
• W2945038412 modified "2023-10-17" @default.
• W2945038412 title "Simple Acoustic Features Can Explain Phoneme-Based Predictions of Cortical Responses to Speech" @default.
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• W2945038412 doi "https://doi.org/10.1016/j.cub.2019.04.067" @default.
• W2945038412 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6584359" @default.
• W2945038412 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31130454" @default.
• W2945038412 hasPublicationYear "2019" @default.
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