AUTHOR=Polka Linda , Bohn Ocke-Schwen , Weiss Daniel J. TITLE=Commentary: Revisiting vocal perception in non-human animals: a review of vowel discrimination, speaker voice recognition, and speaker normalization JOURNAL=Frontiers in Psychology VOLUME=6 YEAR=2015 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2015.00941 DOI=10.3389/fpsyg.2015.00941 ISSN=1664-1078