title: Objective measurement of vocal fatigue in classical singers: a vocal dosimetry pilot study.
abstract: OBJECTIVE
  To collect objective vibration dose data on singers and relate them to subjective measurements of vocal fatigue.
  
  
  METHODS
  Seven subjects completed a 2-week study period. The National Center for Voice and Speech (NCVS) dosimeter recorded vocal load, soft phonation tasks, and subjective soft voice ratings. Three vocal doses (time, distance, and cycle) were measured in classical singers' larynges during an intensive practice period.
  
  
  RESULTS
  Spikes in vocal load are reflected as harsher subjective ratings on the same day as well as 24-72 hours later. When at least 48 hours of vocal rest occurred before a vocal load, improved subjective evaluations were seen after the load.
  
  
  CONCLUSIONS
  The NCVS dosimeter appears to be an effective tool for data collection on prolonged use of the voice.
  
  
  CONCLUSIONS
  This is the first multi-day study comparing objective and subjective data on vocal fatigue in a group of professional singers.
authors.affiliation: University of Colorado at Denver and Health Sciences Center, Department of Otolaryngology, Denver, Colorado 80262-0001, USA. thomas.carroll@uchsc.edu
authors.forename: Thomas
authors.initials: T
authors.lastname: Carroll
authors.forename: John
authors.initials: J
authors.lastname: Nix
authors.forename: Eric
authors.initials: E
authors.lastname: Hunter
authors.forename: Kate
authors.initials: K
authors.lastname: Emerich
authors.forename: Ingo
authors.initials: I
authors.lastname: Titze
authors.forename: Mona
authors.initials: M
authors.lastname: Abaza
mesh_terms: D000328:Adult; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D009146:Music; D009784:Occupational Diseases / Q000175:diagnosis*; D010036:Otolaryngology / Q000295:instrumentation; D010865:Pilot Projects; D014827:Vocal Cords; D014832:Voice Disorders / Q000175:diagnosis*