title: Differences between speech-shaped test stimuli in analyzing systems and the effect on measured hearing aid gain.
abstract: OBJECTIVE
  To determine the effect of spectral differences between stimuli used for verification of hearing aid gain in nonlinear devices.
  
  
  METHODS
  The spectra of nine stimuli from five analyzing systems were obtained.
  
  
  RESULTS
  Most stimuli closely duplicated one of two well-specified spectra. The difference between these two input spectra resulted in measured gain differences of up to 8 dB.
  
  
  CONCLUSIONS
  Careful consideration of selected test stimulus for measuring hearing aid gain is recommended.
authors.affiliation: National Acoustic Laboratories, Chatswood, NSW 2067, Australia. gitte.keidser@nal.gov.au
authors.forename: Gitte
authors.initials: G
authors.lastname: Keidser
authors.forename: Harvey
authors.initials: H
authors.lastname: Dillon
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Convery
authors.forename: Anna
authors.initials: A
authors.lastname: O'Brien
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods*; D006310:Hearing Aids; D034381:Hearing Loss / Q000175:diagnosis* / Q000628:therapy*; D006801:Humans; D017711:Nonlinear Dynamics; D010700:Phonetics; D013018:Sound Spectrography; D013069:Speech Reception Threshold Test