title: [Research on the basic properties of spontaneous otoacoustic emissions].
abstract: OBJECTIVE
  To record and analyze the basic properties of spontaneous otoacoustic emission (SOAE) and to study the application of SOAE.
  
  
  METHODS
  Forty cases (80 ears) with normally hearing subjects and 96 cases with abnormal hearing subjects were tested by ILO92 Otodynamics Analyzer.
  
  
  RESULTS
  (1) SOAE frequencies ranged from about 0.5 kHz to 6 kHz, it's amplitudes distributed between -28 and 6 dB SPL; (2) 49% had SOAE and there were no significant difference in sexuality in normal hearing subjects. During long duration observation, frequency of SOAE was no change; (3) Amplitude of SOAE could be suppressed by contralateral white noise; (4) There were some difference in different hearing loss group for SOAE.
  
  
  CONCLUSIONS
  The presence of SOAE indicated that there is a better function for out hair cells of cochlear.
authors.affiliation: Beijing Institute of Otolaryngology, Department of Otorhinolaryngology, Affiliated Beijing Tongren Hospital of Capital University of Medical Sciences, Beijing, 100730, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Liu
authors.forename: Chan
authors.initials: C
authors.lastname: Liu
authors.forename: Liansheng
authors.initials: L
authors.lastname: Guo
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Zhao
mesh_terms: D000293:Adolescent; D000328:Adult; D003051:Cochlea / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017084:Otoacoustic Emissions, Spontaneous / Q000502:physiology*