It is the purpose of this study to determine if a commercially available electronic stethoscope synchronized with an smart phone or iPad application can be used as an accurate and objective screening tool for measuring dysphagia. The investigators plan to do so in two phases; in Phase I the investigators will recruit normal subjects to establish normal swallowing patterns, as well as optimal sensor placement; and in Phase II the investigators will compare the recordings obtained by the electronic stethoscope with those obtained using videofluoroscopy.