Binaural squelch and head shadow effects in children with unilateral cochlear implants and contralateral hearing aids Gli effetti squelch binaurale e ombra nei bambini con impianto cocleare monolaterale e protesi acustica controlaterale


D'alessandro H., Sennaroğlu G., Yücel E., Belgin E., Mancını P.

Acta Otorhinolaryngologica Italica, vol.35, no.5, pp.343-349, 2015 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 35 Issue: 5
  • Publication Date: 2015
  • Doi Number: 10.14639/0392-100x-497
  • Journal Name: Acta Otorhinolaryngologica Italica
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.343-349
  • Keywords: Cochlear implants, Children, Bimodal benefit, Binaural squelch effect, Head shadow effect, SPEECH-PERCEPTION, PITCH PERCEPTION, BENEFITS, ADULTS, STIMULATION, RECOGNITION, LANGUAGE, USERS, DEAF, EAR

Abstract

© 2015, Pacini Editore S.p.A. All rights reserved.The aim of this study was to investigate the amount of binaural squelch effect (BSE) and head shadow effect (HSE) in children who use unilateral cochlear implants (CI) and contralateral hearing aids (HA). The study group consisted of 19 CI recipient children who consistently wore a contralateral HA. Speech sounds were used to evaluate speech perception performance in noise. Testing was performed in three listening conditions: (1) bimodal listening with noise source on HA side; (2) CI only with noise source contralaterally (HA off); (3) CI only with noise source on the CI side. Statistical analysis revealed a significant difference between the three listening conditions and post hoc tests indicated significant differences for all pairwise comparisons (p < 0.001). The average BSE and HSE were 11.8% and 17.1% respectively. The majority of bimodal CI users showed BSE and HSE with significant speech perception improvement in the presence of noise.