The VocaLog™ Vocal Activity Monitor is for Clinical Research Only. It is designed for doctors and voice clinicians who researching patients in need of vocal monitoring. This monitor collects data for up to three weeks to assist the clinician in identifying vocal patterns, and also assists patients in adhering to their program with the alert features. For Parkinson's Patients, it helps encourage appropriate voice levels. For others, it helps to maintain voice rest or reduce voice levels.