Binaural Pitch Fusion in Bilateral Cochlear Implant Users

Lina Reiss, Jennifer R. Fowler, Curtis L. Hartling, Yonghee Oh

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Objectives: Binaural pitch fusion is the fusion of stimuli that evoke different pitches between the ears into a single auditory image. Individuals who use hearing aids or bimodal cochlear implants (CIs) experience abnormally broad binaural pitch fusion, such that sounds differing in pitch by as much as 3–4 octaves are fused across ears, leading to spectral averaging and speech perception interference. The goal of this study was to determine if adult bilateral CI users also experience broad binaural pitch fusion. Design: Stimuli were pulse trains delivered to individual electrodes. Fusion ranges were measured using simultaneous, dichotic presentation of reference and comparison stimuli in opposite ears, and varying the comparison stimulus to find the range that fused with the reference stimulus. Results: Bilateral CI listeners had binaural pitch fusion ranges varying from 0 to 12 mm (average 6.1 ± 3.9 mm), where 12 mm indicates fusion over all electrodes in the array. No significant correlations of fusion range were observed with any subject factors related to age, hearing loss history, or hearing device history, or with any electrode factors including interaural electrode pitch mismatch, pitch match bandwidth, or within-ear electrode discrimination abilities. Conclusions: Bilateral CI listeners have abnormally broad fusion, similar to hearing aid and bimodal CI listeners. This broad fusion may explain the variability of binaural benefits for speech perception in quiet and in noise in bilateral CI users.

Original languageEnglish (US)
Pages (from-to)390-397
Number of pages8
JournalEar and Hearing
DOIs
StateAccepted/In press - Jan 1 2018

Fingerprint

Cochlear Implants
Electrodes
Ear
Speech Perception
Hearing Aids
Aptitude
Hearing Loss
Hearing
Noise
History
Equipment and Supplies

Keywords

  • Bilateral cochlear implants
  • Binaural
  • Fusion
  • Pitch

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Speech and Hearing

Cite this

Binaural Pitch Fusion in Bilateral Cochlear Implant Users. / Reiss, Lina; Fowler, Jennifer R.; Hartling, Curtis L.; Oh, Yonghee.

In: Ear and Hearing, 01.01.2018, p. 390-397.

Research output: Contribution to journalArticle

Reiss, Lina ; Fowler, Jennifer R. ; Hartling, Curtis L. ; Oh, Yonghee. / Binaural Pitch Fusion in Bilateral Cochlear Implant Users. In: Ear and Hearing. 2018 ; pp. 390-397.
@article{c55ff9445f234f1ab9eb9890b224f8d0,
title = "Binaural Pitch Fusion in Bilateral Cochlear Implant Users",
abstract = "Objectives: Binaural pitch fusion is the fusion of stimuli that evoke different pitches between the ears into a single auditory image. Individuals who use hearing aids or bimodal cochlear implants (CIs) experience abnormally broad binaural pitch fusion, such that sounds differing in pitch by as much as 3–4 octaves are fused across ears, leading to spectral averaging and speech perception interference. The goal of this study was to determine if adult bilateral CI users also experience broad binaural pitch fusion. Design: Stimuli were pulse trains delivered to individual electrodes. Fusion ranges were measured using simultaneous, dichotic presentation of reference and comparison stimuli in opposite ears, and varying the comparison stimulus to find the range that fused with the reference stimulus. Results: Bilateral CI listeners had binaural pitch fusion ranges varying from 0 to 12 mm (average 6.1 ± 3.9 mm), where 12 mm indicates fusion over all electrodes in the array. No significant correlations of fusion range were observed with any subject factors related to age, hearing loss history, or hearing device history, or with any electrode factors including interaural electrode pitch mismatch, pitch match bandwidth, or within-ear electrode discrimination abilities. Conclusions: Bilateral CI listeners have abnormally broad fusion, similar to hearing aid and bimodal CI listeners. This broad fusion may explain the variability of binaural benefits for speech perception in quiet and in noise in bilateral CI users.",
keywords = "Bilateral cochlear implants, Binaural, Fusion, Pitch",
author = "Lina Reiss and Fowler, {Jennifer R.} and Hartling, {Curtis L.} and Yonghee Oh",
year = "2018",
month = "1",
day = "1",
doi = "10.1097/AUD.0000000000000497",
language = "English (US)",
pages = "390--397",
journal = "Ear and Hearing",
issn = "0196-0202",
publisher = "Lippincott Williams and Wilkins",

}

TY - JOUR

T1 - Binaural Pitch Fusion in Bilateral Cochlear Implant Users

AU - Reiss, Lina

AU - Fowler, Jennifer R.

AU - Hartling, Curtis L.

AU - Oh, Yonghee

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Objectives: Binaural pitch fusion is the fusion of stimuli that evoke different pitches between the ears into a single auditory image. Individuals who use hearing aids or bimodal cochlear implants (CIs) experience abnormally broad binaural pitch fusion, such that sounds differing in pitch by as much as 3–4 octaves are fused across ears, leading to spectral averaging and speech perception interference. The goal of this study was to determine if adult bilateral CI users also experience broad binaural pitch fusion. Design: Stimuli were pulse trains delivered to individual electrodes. Fusion ranges were measured using simultaneous, dichotic presentation of reference and comparison stimuli in opposite ears, and varying the comparison stimulus to find the range that fused with the reference stimulus. Results: Bilateral CI listeners had binaural pitch fusion ranges varying from 0 to 12 mm (average 6.1 ± 3.9 mm), where 12 mm indicates fusion over all electrodes in the array. No significant correlations of fusion range were observed with any subject factors related to age, hearing loss history, or hearing device history, or with any electrode factors including interaural electrode pitch mismatch, pitch match bandwidth, or within-ear electrode discrimination abilities. Conclusions: Bilateral CI listeners have abnormally broad fusion, similar to hearing aid and bimodal CI listeners. This broad fusion may explain the variability of binaural benefits for speech perception in quiet and in noise in bilateral CI users.

AB - Objectives: Binaural pitch fusion is the fusion of stimuli that evoke different pitches between the ears into a single auditory image. Individuals who use hearing aids or bimodal cochlear implants (CIs) experience abnormally broad binaural pitch fusion, such that sounds differing in pitch by as much as 3–4 octaves are fused across ears, leading to spectral averaging and speech perception interference. The goal of this study was to determine if adult bilateral CI users also experience broad binaural pitch fusion. Design: Stimuli were pulse trains delivered to individual electrodes. Fusion ranges were measured using simultaneous, dichotic presentation of reference and comparison stimuli in opposite ears, and varying the comparison stimulus to find the range that fused with the reference stimulus. Results: Bilateral CI listeners had binaural pitch fusion ranges varying from 0 to 12 mm (average 6.1 ± 3.9 mm), where 12 mm indicates fusion over all electrodes in the array. No significant correlations of fusion range were observed with any subject factors related to age, hearing loss history, or hearing device history, or with any electrode factors including interaural electrode pitch mismatch, pitch match bandwidth, or within-ear electrode discrimination abilities. Conclusions: Bilateral CI listeners have abnormally broad fusion, similar to hearing aid and bimodal CI listeners. This broad fusion may explain the variability of binaural benefits for speech perception in quiet and in noise in bilateral CI users.

KW - Bilateral cochlear implants

KW - Binaural

KW - Fusion

KW - Pitch

UR - http://www.scopus.com/inward/record.url?scp=85044286113&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85044286113&partnerID=8YFLogxK

U2 - 10.1097/AUD.0000000000000497

DO - 10.1097/AUD.0000000000000497

M3 - Article

SP - 390

EP - 397

JO - Ear and Hearing

JF - Ear and Hearing

SN - 0196-0202

ER -