<qa>  What is the standard 24-hour pH monitoring system?Although laryno-pharyngeal reflux LPR and gastroesophageal reflux disease GERD differ in symptoms and treatment, they are diagnosed by the same standard 24-hour pH monitoring system which measures liquid reflux in the esophagus. The investigators are evaluating a new 24-hour pharyngeal pH monitoring system by Restech which can measure acid exposure in the airway and can be used specifically for LPR diagnosis. The purpose of this study is to determine whether the Restech device is more effective than standard pH monitoring in predicting the response to proton pump inhibitor PPI acid suppression therapy using Dexlansoprazole in patients with symptoms andor manifestations of LPR. 