Ir. Titze et al., POPULATIONS IN THE US WORKFORCE WHO RELY ON VOICE AS A PRIMARY TOOL OF TRADE - A PRELIMINARY-REPORT, Journal of voice, 11(3), 1997, pp. 254-259
The United States Bureau of Labor Statistics and other sources were co
nsulted about the percentages of the working population that we identi
fied as professional voice users. The largest percentage may be in sal
es and sales-related occupations (13%), but the exact breakdown of tho
se who approach their clients vocally rather than by mail is still unc
ertain, The second largest population is teachers, who comprise 4.2% p
ercent of the U.S. workforce (1994 statistic). Teachers have been iden
tified as having the greatest incidence of voice disorders. Population
data are also given for professional voice users who could present a
significant hazard to public safety if their vocal communication skill
s were severely impaired.