Journal article Open Access

Coherent Coding of Enhanced Interaural Cues Improves Sound Localization in Noise With Bilateral Cochlear Implants

Williges, Ben; Jürgens, Tim; Hu, Hongmei; Dietz, Mathias

MARC21 XML Export

<?xml version='1.0' encoding='UTF-8'?>
<record xmlns="">
  <datafield tag="540" ind1=" " ind2=" ">
    <subfield code="u"></subfield>
    <subfield code="a">Creative Commons Attribution 4.0 International</subfield>
  <datafield tag="260" ind1=" " ind2=" ">
    <subfield code="c">2018-07-02</subfield>
  <controlfield tag="005">20200917125930.0</controlfield>
  <controlfield tag="001">4034505</controlfield>
  <datafield tag="909" ind1="C" ind2="O">
    <subfield code="p">openaire</subfield>
    <subfield code="o"></subfield>
  <datafield tag="520" ind1=" " ind2=" ">
    <subfield code="a">&lt;p&gt;Bilateral cochlear implant (BCI) users only have very limited spatial hearing abilities. Speech coding strategies transmit interaural level differences (ILDs) but in a distorted manner. Interaural time difference (ITD) information transmission is even more limited. With these cues, most BCI users can coarsely localize a single source in quiet, but performance quickly declines in the presence of other sound. This proof-of-concept study presents a novel signal processing algorithm specific for BCIs, with the aim to improve sound localization in noise. The core part of the BCI algorithm duplicates a monophonic electrode pulse pattern and applies quasistationary natural or artificial ITDs or ILDs based on the estimated direction of the dominant source. Three experiments were conducted to evaluate different algorithm variants: Experiment 1 tested if ITD transmission alone enables BCI subjects to lateralize speech. Results showed that six out of nine BCI subjects were able to lateralize intelligible speech in quiet solely based on ITDs. Experiments 2 and 3 assessed azimuthal angle discrimination in noise with natural or modified ILDs and ITDs. Angle discrimination for frontal locations was possible with all variants, including the pure ITD case, but for lateral reference angles, it was only possible with a linearized ILD mapping. Speech intelligibility in noise, limitations, and challenges of this interaural cue transmission approach are discussed alongside suggestions for modifying and further improving the BCI algorithm.&lt;/p&gt;</subfield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="a">Jürgens, Tim</subfield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="a">Hu, Hongmei</subfield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="a">Dietz, Mathias</subfield>
  <datafield tag="856" ind1="4" ind2=" ">
    <subfield code="s">778023</subfield>
    <subfield code="z">md5:a698cd1dc4eb589e63f13d37a8f81fe2</subfield>
    <subfield code="u"> et al 2018.pdf</subfield>
  <datafield tag="542" ind1=" " ind2=" ">
    <subfield code="l">open</subfield>
  <datafield tag="980" ind1=" " ind2=" ">
    <subfield code="a">publication</subfield>
    <subfield code="b">article</subfield>
  <datafield tag="100" ind1=" " ind2=" ">
    <subfield code="a">Williges, Ben</subfield>
  <datafield tag="041" ind1=" " ind2=" ">
    <subfield code="a">eng</subfield>
  <datafield tag="653" ind1=" " ind2=" ">
    <subfield code="a">Binaural Hearing, Cochlear Implants</subfield>
  <datafield tag="024" ind1=" " ind2=" ">
    <subfield code="a">10.1177/2331216518781746</subfield>
    <subfield code="2">doi</subfield>
  <datafield tag="245" ind1=" " ind2=" ">
    <subfield code="a">Coherent Coding of Enhanced Interaural Cues Improves Sound Localization in Noise With Bilateral Cochlear Implants</subfield>
  <datafield tag="536" ind1=" " ind2=" ">
    <subfield code="c">716800</subfield>
    <subfield code="a">Individualized Binaural Diagnostics and Technology</subfield>
  <datafield tag="536" ind1=" " ind2=" ">
    <subfield code="c">304912</subfield>
    <subfield code="a">Advancing Binaural Cochlear Implant Technology</subfield>
  <datafield tag="650" ind1="1" ind2="7">
    <subfield code="a">cc-by</subfield>
    <subfield code="2"></subfield>
Views 25
Downloads 32
Data volume 24.9 MB
Unique views 24
Unique downloads 32


Cite as