Musical pitch interval comparisons in cochlear implants

Music perception remains challenging for many cochlear implant (CI) recipients, due perhaps in part to the frequency mismatch that occurs between the electrode-neural interface and the frequencies allocated by the programming. Individual differences in ear anatomy, electrode array length, and surgical insertion can lead to great variability in the positions of electrodes within the cochlea, but these differences are not typically accounted for by current CI programming techniques. Flat panel computed tomography (FPCT) can be used to visualize the location of the electrodes and calculate the corresponding spiral ganglion characteristic frequencies. Such FPCT-based CI frequency mapping may improve pitch perception accuracy, and thus music appreciation, as well as speech perception. The present study seeks to develop a behavioral assessment metric for how well place-based pitch is represented across the frequency spectrum. Listeners were asked to match the pitch interval created by two ton..., Subjects
Two primary groups were enlisted for this study: normal hearing (NH) individuals and cochlear implant (CI) recipients. NH listeners were used to establish baseline data that could be used to compare against CI recipients. CI recipients are included here as a pilot to determine whether this approach is feasible for these listeners.  
Normal Hearing (NH) Participants
Recruited through the University of Minnesota, 31 NH individuals participated. The group that assessed unprocessed stimuli comprised 15 participants (average age: 22.6 years, SD: ±1.5; gender distribution: 5 males, 10 females) with an average of 8.1 years (SD: ±3.9) of musical experience. The vocoded stimuli group included 16 participants (average age: 28.6 years, SD: ±13.8; gender distribution: 7 males, 9 females), reporting an average of 11.1 years (SD: ±11.1) of musical experience. Testing for both NH groups was completed remotely via an online MATLAB platform, requiring the use of headphones.
Cochlear Implant (CI..., , # Musical pitch interval comparisons in cochlear implants

[https://doi.org/10.5061/dryad.dfn2z359d](https://doi.org/10.5061/dryad.dfn2z359d)

## Description of the data and file structure

Excel file with summary data:

* Participant ID - each subject is given a number
* Test ID - the number the subject used to access the test, which matches their raw data file
* Age - the age in years when the subject was tested
* Music Training - the number of years of formal music training each subject reports having (e.g., 1:1 lessons, school band, etc.)
* Cohort - which of the 3 cohorts each subject belonged to: NH (natural hearing), Voc (Vocoder), or CI (cochlear implant)
* Condition - the listening condition
* Freq Range - either Low vs Mid or Mid vs High
* Fixed Semitone Interval - either 4 or 7
* Test Parameters - a field combining the Freq Range and Fixed Semitone Interval fields, used to indicate which subtest was completed
* PSE - point of subjective equality, measured i...