Binary classification of spoken words with passive elastic metastructures. - Tena Dubcek; Daniel Moreno-Garcia; Thomas Haag; Henrik R. Thomsen; Theodor S. Becker; Christoph Bärlocher; Fredrik Andersson; Sebastian D. Huber; Dirk-Jan van Manen; Luis Guillermo Villanueva; Johan O. A. Robertsson; Marc Serra-Garcia (CoRR, 2021)