University of Santiago de Compostela 1 article published in JoVE Neuroscience Pupillometry to Assess Auditory Sensation in Guinea Pigs Marianny Pernia1,2, Manaswini Kar1,2,4, Pilar Montes-Lourido1,2,6, Srivatsun Sadagopan1,2,3,4,5 1Department of Neurobiology, University of Pittsburgh, 2Center for Neuroscience, University of Pittsburgh, 3Department of Bioengineering, University of Pittsburgh, 4Center for Neural Basis of Cognition, University of Pittsburgh, 5Department of Communication Science and Disorders, University of Pittsburgh, 6Department of Transfer and Innovation, USC University Hospital Complex (CHUS), University of Santiago de Compostela Pupillometry, a simple and non-invasive technique, is proposed as a method to determine hearing-in-noise thresholds in normal hearing animals and animal models of various auditory pathologies.