title: [Observation of deaf-mute students' audition examine and otacoustic effect].
abstract: OBJECTIVE
  To explore the state of the remnant hearing of deaf-mute students and to check the effect of hearing aids to them.
  
  
  METHODS
  38 cases of deaf and dumb students were examined with the pure tone auditometry, acoustic immitance test, auditory brainstem response, and the environmental sound discrimination test.
  
  
  RESULTS
  In 17 cases, the average threshold of air conduction of speech frequency is below 89 dB HL; In 18 cases, it is between 90 dB and 110 dB; In 3 cases, it is above 110 dB. 33 cases have model A curve and 5 cases have model B curve. When 123 dB peSPL was presented, 24 cases generated the waveform but the others didn't. 16 cases could discriminate the environmental sound and the other 22 cases could not, but if the patients weared the hearing aids, the number of the persons who could discriminate the environmental sound increased to 24, only 14 cases had no effect by this means.
  
  
  CONCLUSIONS
  Examination of deaf-mutes audition can find persons with residual audition. If they wear the hearing aids and go into hearing rehabilitation training at the same time as early as possible, it will improve the environmental sound discrimination rate.
authors.affiliation: Department of Otolaryngology, Kunming Children's Hospital, Kunming 650021.
authors.forename: J Y
authors.initials: JY
authors.lastname: Lin
authors.forename: S Q
authors.initials: SQ
authors.lastname: Zhao
authors.forename: T S
authors.initials: TS
authors.lastname: Zhang
authors.forename: Q X
authors.initials: QX
authors.lastname: Ma
mesh_terms: D000158:Acoustic Impedance Tests; D000293:Adolescent; D000328:Adult; D001301:Audiometry, Pure-Tone; D002648:Child; D003638:Deafness / Q000503:physiopathology* / Q000534:rehabilitation; D016057:Evoked Potentials, Auditory, Brain Stem; D005260:Female; D006310:Hearing Aids; D006801:Humans; D008297:Male