Objective To assess subject tolerance of extended use of the VocaLog™ vocal monitor (VM),
a device marketed to log calibrated decibel sound pressure level. Study Design Prospective
between-subjects design including two age-and sex-matched groups: individuals with
Parkinson disease (IWPD) and healthy persons. Methods After an initial session to calibrate
the device and demonstrate its use, participants wore the VM during waking hours for five
consecutive days. At a second visit to return the VM, participants completed a survey and a …