title: [Observation and analyses on voice changes in the normal aged].
abstract: OBJECTIVE
  To measure the voice samples of the normal aged in order to systemically study the features of the voice changes.
  
  
  METHODS
  To collect and analyze 146 voice samples of the normal aged with sonogram.
  
  
  RESULTS
  The fundamental frequency of the voice of the aged decreases and rises in the male more than 80 years older. The low frequency harmonics are regulation and the intensity is strong in the formant of the aged. The difference reduces in voice between male and female. The harmonics to noise ratio tends downwards and the amplitude perturbation quotient tends upwards along with the growth of age in the aged male. The changes of the above-mentioned parameters are not significant in the aged female.
  
  
  CONCLUSIONS
  The voice changes are normal physiological ones in the normal aged. The changes of the parameters are used to evaluate normal aged voice and abnormal one. The changes show that the function in the aged phonation tends to decline to a certain extent and it must be protected and be trained.
authors.affiliation: Department of Otorhinolaryngology, Beijing Hospital, Beijing 100730.
authors.forename: Y
authors.initials: Y
authors.lastname: Liang
authors.forename: W N
authors.initials: WN
authors.lastname: Huang
authors.forename: C
authors.initials: C
authors.lastname: Zhang
authors.forename: Q R
authors.initials: QR
authors.lastname: Meng
authors.forename: L J
authors.initials: LJ
authors.lastname: Yang
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010699:Phonation; D012737:Sex Factors; D013018:Sound Spectrography; D014833:Voice Quality