L
Lorena Álvarez
Researcher at University of Alcalá
Publications - 25
Citations - 292
Lorena Álvarez is an academic researcher from University of Alcalá. The author has contributed to research in topics: Artificial neural network & Audio signal. The author has an hindex of 7, co-authored 25 publications receiving 267 citations.
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Journal ArticleDOI
Wearable Biomedical Measurement Systems for Assessment of Mental Stress of Combatants in Real Time
Fernando Seoane,Inmaculada Mohino-Herranz,Javier Ferreira,Lorena Álvarez,Ruben Buendia,David Ayllón,Cosme Llerena,Roberto Gil-Pita +7 more
TL;DR: The preliminary results obtained from the data analysis collected during the first phase of the ATREC project are presented, indicating the good classification performance exhibited when using features obtained from electrocardiographic recordings and electrical bioimpedance measurements from the thorax.
Journal ArticleDOI
Sensorized Garments and Textrode-Enabled Measurement Instrumentation for Ambulatory Assessment of the Autonomic Nervous System Response in the ATREC Project
Fernando Seoane,J. Ferreira,Lorena Álvarez,Ruben Buendia,David Ayllón,Cosme Llerena,Roberto Gil-Pita +6 more
TL;DR: Experimental results indicate that the implemented wearable measurement systems operate according to the specifications and are ready to be used for mental stress experiments, which will be executed in the coming phases of the project with dozens of healthy volunteers.
Book ChapterDOI
Automatic sound classification for improving speech intelligibility in hearing aids using a layered structure
TL;DR: This paper presents some of the first results in the development of an automatic sound classification algorithm for hearing aids, and a divide and conquer strategy is proposed, resulting thus in a layered structure.
Proceedings ArticleDOI
Reducing the computational cost for sound classification in hearing aids by selecting features via genetic algorithms with restricted search
TL;DR: The proposed feature-selection algorithm selects a feature subset composed of only 21 features, much smaller than the 76 features of the complete, original set of available features, saving a great number of the scarce computational resources, and making possible to put into practice the concept at reasonable cost.
Journal ArticleDOI
Two-layer automatic sound classification system for conversation enhancement in hearing aids
TL;DR: In this paper, the authors focus on the development of an automatic sound classifier for digital hearing aids that aims to enhance the listening comprehension when the user goes from a sound environment to another different one.