title: Acoustic analysis of tracheo-oesophageal voice in male total laryngectomy patients.
abstract: BACKGROUND
  The aim of this study was to test the null hypothesis that voice parameters of post-laryngectomy patients using tracheo-oesophageal (TO) prosthetic valves are similar to those of normal laryngeal subjects.
  
  
  METHODS
  Thirty total laryngectomy patients and thirty normal  controls were subjected to acoustic analysis of single voice recordings using a sustained vowel. Acoustic parameters including fundamental frequency, jitter, shimmer, harmonics-to-noise ratio and maximum phonation time were analysed.
  
  
  RESULTS
  Poorer values were found as well as larger  variability for all the voice parameters for the total laryngectomy patients using TO voice compared with those of normal subjects. There were statistically significant differences (p<0.05) for all studied parameters between the TO and normal speech.
  
  
  CONCLUSIONS
  Alaryngeal speech  with TO voice prosthesis is not yet comparable to laryngeal speech.
authors: ENT Department, Grant Medical College, Byculla, Mumbai - 400 008, India. nitin399@gmail.com
authors: N
authors: N
authors: Deore
authors: S
authors: S
authors: Datta
authors: R C
authors: RC
authors: Dwivedi
authors: R
authors: R
authors: Palav
authors: R
authors: R
authors: Shah
authors: S I
authors: SI
authors: Sayed
authors: M
authors: M
authors: Jagde
authors: R
authors: R
authors: Kazi
mesh_terms: D000328:Adult; D000368:Aged; D006801:Humans; D007822:Laryngeal Neoplasms / Q000534:rehabilitation / Q000601:surgery*; D007825:Laryngectomy / Q000379:methods*; D007831:Larynx, Artificial; D008297:Male; D008875:Middle Aged; D010699:Phonation / Q000502:physiology; D013061:Speech Acoustics; D013071:Speech, Alaryngeal