PMID- 31607846
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220410
IS  - 1662-4548 (Print)
IS  - 1662-453X (Electronic)
IS  - 1662-453X (Linking)
VI  - 13
DP  - 2019
TI  - Musical Sound Quality as a Function of the Number of Channels in Modern Cochlear 
      Implant Recipients.
PG  - 999
LID - 10.3389/fnins.2019.00999 [doi]
LID - 999
AB  - OBJECTIVES: This study examined musical sound quality (SQ) in adult cochlear 
      implant (CI) recipients. The study goals were to determine: the number of 
      channels needed for high levels of musical SQ overall and by musical genre; the 
      impact of device and patient factors on musical SQ ratings; and the relationship 
      between musical SQ, speech recognition, and speech SQ to relate these findings to 
      measures frequently used in clinical protocols. METHODS: Twenty-one 
      post-lingually deafened adult CI recipients participated in this study. Electrode 
      placement, including scalar location, average electrode-to-modiolus distance ( M  
      ), and angular insertion depth were determined by CT imaging using validated CI 
      position analysis algorithms (e.g., Noble et al., 2013; Zhao et al., 2018, 2019). 
      CI programs were created using 4-22 electrodes with equal spatial distribution of 
      active electrodes across the array. Speech recognition, speech SQ, music 
      perception via a frequency discrimination task, and musical SQ were acutely 
      assessed for all electrode conditions. Musical SQ was assessed using pre-selected 
      musical excerpts from a variety of musical genres. RESULTS: CI recipients 
      demonstrated continuous improvement in qualitative judgments of musical SQ with 
      up to 10 active electrodes. Participants with straight electrodes placed in scala 
      tympani (ST) and pre-curved electrodes with higher M  variance reported higher 
      levels of musical SQ; however, this relationship is believed to be driven by 
      levels of musical experience as well as the potential for preoperative bias in 
      device selection. Participants reported significant increases in musical SQ 
      beyond four channels for all musical genres examined in the current study except 
      for Hip Hop/Rap. After musical experience outliers were removed, there was no 
      relationship between musical experience or frequency discrimination ability and 
      musical SQ ratings. There was a weak, but significant correlation between 
      qualitative ratings for speech stimuli presented in quiet and in noise and 
      musical SQ. CONCLUSION: Modern CI recipients may need more channels for musical 
      SQ than even required for asymptotic speech recognition or speech SQ. These 
      findings may be used to provide clinical guidance for personalized expectations 
      management of music appreciation depending on individual device and patient 
      factors.
CI  - Copyright (c) 2019 Berg, Noble, Dawant, Dwyer, Labadie, Richards and Gifford.
FAU - Berg, Katelyn
AU  - Berg K
AD  - Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, 
      Nashville, TN, United States.
FAU - Noble, Jack
AU  - Noble J
AD  - Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, 
      Nashville, TN, United States.
AD  - Department of Electrical Engineering and Computer Science, Vanderbilt University, 
      Nashville, TN, United States.
AD  - Department of Otolaryngology, Vanderbilt University Medical Center, Nashville, 
      TN, United States.
FAU - Dawant, Benoit
AU  - Dawant B
AD  - Department of Electrical Engineering and Computer Science, Vanderbilt University, 
      Nashville, TN, United States.
AD  - Department of Otolaryngology, Vanderbilt University Medical Center, Nashville, 
      TN, United States.
FAU - Dwyer, Robert
AU  - Dwyer R
AD  - Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, 
      Nashville, TN, United States.
FAU - Labadie, Robert
AU  - Labadie R
AD  - Department of Electrical Engineering and Computer Science, Vanderbilt University, 
      Nashville, TN, United States.
AD  - Department of Otolaryngology, Vanderbilt University Medical Center, Nashville, 
      TN, United States.
FAU - Richards, Virginia
AU  - Richards V
AD  - Department of Cognitive Science, University of California, Irvine, Irvine, CA, 
      United States.
FAU - Gifford, Rene
AU  - Gifford R
AD  - Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, 
      Nashville, TN, United States.
AD  - Department of Otolaryngology, Vanderbilt University Medical Center, Nashville, 
      TN, United States.
LA  - eng
GR  - R01 DC009404/DC/NIDCD NIH HHS/United States
GR  - R01 DC014037/DC/NIDCD NIH HHS/United States
PT  - Journal Article
DEP - 20190924
PL  - Switzerland
TA  - Front Neurosci
JT  - Frontiers in neuroscience
JID - 101478481
PMC - PMC6769043
OTO - NOTNLM
OT  - channels
OT  - cochlear implant
OT  - electrode placement
OT  - music
OT  - sound quality
EDAT- 2019/10/15 06:00
MHDA- 2019/10/15 06:01
PMCR- 2019/01/01
CRDT- 2019/10/15 06:00
PHST- 2019/06/03 00:00 [received]
PHST- 2019/09/03 00:00 [accepted]
PHST- 2019/10/15 06:00 [entrez]
PHST- 2019/10/15 06:00 [pubmed]
PHST- 2019/10/15 06:01 [medline]
PHST- 2019/01/01 00:00 [pmc-release]
AID - 10.3389/fnins.2019.00999 [doi]
PST - epublish
SO  - Front Neurosci. 2019 Sep 24;13:999. doi: 10.3389/fnins.2019.00999. eCollection 
      2019.