Binaural hearing in children using Gaussian enveloped and transposed tones

Erica Ehlers, Alan Kan, Matthew B. Winn, Corey Stoelb, Ruth Y. Litovsky

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Children who use bilateral cochlear implants (BiCIs) show significantly poorer sound localization skills than their normal hearing (NH) peers. This difference has been attributed, in part, to the fact that cochlear implants (CIs) do not faithfully transmit interaural time differences (ITDs) and interaural level differences (ILDs), which are known to be important cues for sound localization. Interestingly, little is known about binaural sensitivity in NH children, in particular, with stimuli that constrain acoustic cues in a manner representative of CI processing. In order to better understand and evaluate binaural hearing in children with BiCIs, the authors first undertook a study on binaural sensitivity in NH children ages 8-10, and in adults. Experiments evaluated sound discrimination and lateralization using ITD and ILD cues, for stimuli with robust envelope cues, but poor representation of temporal fine structure. Stimuli were spondaic words, Gaussian-enveloped tone pulse trains (100 pulse-per-second), and transposed tones. Results showed that discrimination thresholds in children were adult-like (15-389 μs for ITDs and 0.5-6.0 dB for ILDs). However, lateralization based on the same binaural cues showed higher variability than seen in adults. Results are discussed in the context of factors that may be responsible for poor representation of binaural cues in bilaterally implanted children.

Original languageEnglish (US)
Pages (from-to)1724-1733
Number of pages10
JournalJournal of the Acoustical Society of America
Volume139
Issue number4
DOIs
StatePublished - Apr 2016
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by NIH-NIDCD Grant No. 5R01DC00835 (R.Y.L.) and in part by a core grant to the Waisman Center from the NIH-NICHD (Grant No. P30 HD03352).

Publisher Copyright:
© 2016 Acoustical Society of America.

Fingerprint

Dive into the research topics of 'Binaural hearing in children using Gaussian enveloped and transposed tones'. Together they form a unique fingerprint.

Cite this