Ge. Lancioni et S. Markus, A deaf woman learning to control her excessive vocal loudness through a portable feedback system, PERC MOT SK, 88(3), 1999, pp. 1347-1349
A deaf woman learned to control her excessive vocal loudness through a port
able feedback system, which provided vibratory stimulation when her voice w
as too loud. The mean percentage of excessively loud talking decreased from
45 prior to the use of feedback to 3 during the use of feedback. This impr
ovement (documented by formal observation) was confirmed by normally hearin
g people sharing the work environment with the woman. The woman preferred a
system with a contact microphone since this was virtually unaffected by en
vironmental noise.