title: [Auditory steady-state response in the auditory evaluation: clinical application].
abstract: BACKGROUND
  the auditory steady state response (ASSR) is an electrophysiological procedure that evaluates, at the same time, the hearing thresholds of both ears at various frequencies. This procedure reduces the time of testing and enables the stimulation of levels close to 125dB HL, characterizing residual hearing.
  
  
  OBJECTIVE
  to verify the applicability of the ASSR to determine the hearing thresholds in different levels of sensorineural hearing loss.
  
  
  METHODS
  48 individuals aged 7-30 years, with different levels of hearing loss were assessed. The Pure tone Audiometry (PTA) and the ASSR were carried out in following carrier frequencies 0.5; 1; 2 and 4k Hz. The carrier frequencies in the ASSR were modulated in amplitude and frequency, with multiple dicotic stimulation for mild and moderate hearing loss. Simple stimulation was used to test the other hearing deficit levels.
  
  
  RESULTS
  there was a significant association (p<0.01) between the thresholds obtained in the PTA and in the ASSR for all of the tested frequencies, especially for the severe levels. However, for some patients, the hearing loss level was overestimated in the ASSR.
  
  
  CONCLUSIONS
  the ASSR can be used to estimate the PTA threshold; nevertheless, it should not be analyzed in an isolated way, but seen as a complementary procedure to the behavioral auditory assessment.
authors.affiliation: Departamento de Fonoaudiologia, Faculdade de Odontologia de Bauru, Universidade de São Paulo. josileneduarte@uol.com.br
authors.forename: Josilene Luciene
authors.initials: JL
authors.lastname: Duarte
authors.forename: Kátia de Freitas
authors.initials: Kde F
authors.lastname: Alvarenga
authors.forename: Tatiana Manfrini
authors.initials: TM
authors.lastname: Garcia
authors.forename: Orozimbo Alves
authors.initials: OA
authors.lastname: Costa Filho
authors.forename: Otávio G
authors.initials: OG
authors.lastname: Lins
mesh_terms: D000293:Adolescent; D000328:Adult; D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold / Q000502:physiology*; D002648:Child; D004594:Electrophysiology; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D005260:Female; D006319:Hearing Loss, Sensorineural / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D008297:Male; D013017:Sound Localization / Q000502:physiology*; D055815:Young Adult