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Main Authors:	De Cristofaro, Domenico, Vitale, Vincenzo Norman, Vietti, Alessandro
Format:	Preprint
Published:	2025
Subjects:	Computation and Language
Online Access:	https://arxiv.org/abs/2508.17914
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author	De Cristofaro, Domenico Vitale, Vincenzo Norman Vietti, Alessandro
author_facet	De Cristofaro, Domenico Vitale, Vincenzo Norman Vietti, Alessandro
contents	Automatic Speech Recognition has advanced with self-supervised learning, enabling feature extraction directly from raw audio. In Wav2Vec, a CNN first transforms audio into feature vectors before the transformer processes them. This study examines CNN-extracted information for monophthong vowels using the TIMIT corpus. We compare MFCCs, MFCCs with formants, and CNN activations by training SVM classifiers for front-back vowel identification, assessing their classification accuracy to evaluate phonetic representation.
format	Preprint
id	arxiv_https___arxiv_org_abs_2508_17914
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Evaluating the Representation of Vowels in Wav2Vec Feature Extractor: A Layer-Wise Analysis Using MFCCs De Cristofaro, Domenico Vitale, Vincenzo Norman Vietti, Alessandro Computation and Language Automatic Speech Recognition has advanced with self-supervised learning, enabling feature extraction directly from raw audio. In Wav2Vec, a CNN first transforms audio into feature vectors before the transformer processes them. This study examines CNN-extracted information for monophthong vowels using the TIMIT corpus. We compare MFCCs, MFCCs with formants, and CNN activations by training SVM classifiers for front-back vowel identification, assessing their classification accuracy to evaluate phonetic representation.
title	Evaluating the Representation of Vowels in Wav2Vec Feature Extractor: A Layer-Wise Analysis Using MFCCs
topic	Computation and Language
url	https://arxiv.org/abs/2508.17914

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