title: The advantages of sound localization and speech perception of bilateral electric acoustic stimulation.
abstract: CONCLUSIONS
  Bilateral electric acoustic stimulation (EAS) effectively improved speech perception in noise and sound localization in patients with high-frequency hearing loss.
  
  
  OBJECTIVE
  To evaluate bilateral EAS efficacy of sound localization detection and speech perception in noise in two cases of high-frequency hearing loss.
  
  
  METHODS
  Two female patients, aged 38 and 45 years, respectively, received bilateral EAS sequentially. Pure-tone audiometry was performed preoperatively and postoperatively to evaluate the hearing preservation in the lower frequencies. Speech perception outcomes in quiet and noise and sound localization were assessed with unilateral and bilateral EAS.
  
  
  RESULTS
  Residual hearing in the lower frequencies was well preserved after insertion of a FLEX(24) electrode (24 mm) using the round window approach. After bilateral EAS, speech perception improved in quiet and even more so in noise. In addition, the sound localization ability of both cases with bilateral EAS improved remarkably.
authors.affiliation: Department of Otorhinolaryngology.
authors.forename: Hideaki
authors.initials: H
authors.lastname: Moteki
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Kitoh
authors.forename: Keita
authors.initials: K
authors.lastname: Tsukada
authors.forename: Satoshi
authors.initials: S
authors.lastname: Iwasaki
authors.forename: Shin-Ya
authors.initials: SY
authors.lastname: Nishio
authors.forename: Shin-Ichi
authors.initials: S
authors.lastname: Usami
mesh_terms: D000328:Adult; D019929:Cochlear Implantation / Q000295:instrumentation*; D004599:Electric Stimulation Therapy / Q000295:instrumentation; D005260:Female; D006312:Hearing Loss, Bilateral / Q000601:surgery*; D006801:Humans; D008875:Middle Aged; D013017:Sound Localization; D013067:Speech Perception
keywords: High frequency; cochlear implant; hearing loss; residual hearing