Raw Data from - Speech-ABRs in Cochlear Implant Recipients: Feasibility Study

Speech-ABRs in Cochlear Implant Recipients: Feasibility Study

Ghada BinKhamis, Emanuele Perugia, Martin O’Driscoll, Karolina Kluk

Please site the paper when using this dataset (DOI: 10.1080/14992027.2019.1619100)

Participant Recordings (BinKhamis et al Speech_ABR in CI raw data.zip)

• Description of raw EEG (speech-ABR) data main folder, subfolders, and raw EEG files
  • Folder Information
    • Main folder: Contains 12 subfolders with the raw data from 12 participants
    • Subfolders: Each subfolder contains raw EEG recordings from one participant, subfolders names are:
    • CI1, CI2, CI3, CI4, CI5, CI6, CI7, CI8, CI9, CI10, CI11, CI12
  • Each participant subfolder contains four ‘.mat’ files:
    • Each ‘.mat’ file starts with the participant ID
      • CI1, CI2, CI3, CI4, CI5, CI6, CI7, CI8, CI9, CI10, CI11, CI12
    • Followed by the stimulus: 40 da
    • Followed by the stimulus polarity
      • Pos for positive/standard
      • Neg for negative (reversed polarity stimulus)
    • Followed by the ipsilateral/implanted ear
      • R for right ear
      • L for left ear
    • Finally the recording number for that polarity
      • 1 is the first recording
      • 2 is the second recording
  • Example ‘.mat’ file name:
    • CI1 40 da Neg R1.mat: Participant number 1, reversed polarity stimulus, implanted ear – right ear, recording number one
    • CI9 40 da Pos L2.mat: Participant number 9, standard/positive polarity stimulus, implanted ear – left ear, recording number two
  • Description of ‘.mat’ files that can be accessed and processed using MATLAB (MathWorks): Each ‘.mat’ file is a structure that contains the following fields:
    • The first nine fields are informational, for example:
      • xunits: ‘s’ indicates that the recording time window is in seconds, conversion to milliseconds would be required to plot the data in milliseconds
      • start: ‘0’ indicates that both stimulus and recording start at 0 seconds
      • points: 13750 is the number of sample points
      • chans: 2 is the number of channels (channel 2 is the ipsilateral channel for participants with a Right CI, and channel 1 is the ipsilateral channel for participants with a Left CI)
      • frames: 2500 is the number of epochs (repetitions)
    • The last filed ‘values’ is what contains the raw EEG data (13750x2x2500)
      • 13750 is the number of samples
      • 2 is the number of channels (channel one is recorded from the left ear lobe (A1) and channel two is from the right ear lobe (A2))
      • 2500 is the number of epochs

Date of data collection: September 2017

Artificial-head artefact Recordings (BinKhamis et al Speech_ABR in CI artefact data.zip)

• This folder contains six artificial-head artefact recordings
  • CI07_Artefact_40da_neg.mat
    • Artefact based on closest approximation to CI07's MAP
    • Recorded in response to a reversed polarity (neg) 40 ms [da]
  • CI07_Artefact_40da_pos.mat
    • Artefact based on closest approximation to CI07's MAP
    • Recorded in response to a standard polarity (pos) 40 ms [da]
  • CI08_Artefact_40da_neg.mat
    • Artefact based on closest approximation to CI08's MAP
    • Recorded in response to a reversed polarity (neg) 40 ms [da]
  • CI08_Artefact_40da_pos.mat
    • Artefact based on closest approximation to CI08's MAP
    • Recorded in response to a standard polarity (pos) 40 ms [da]
  • CI09_Artefact_40da_neg.mat
    • Artefact based on closest approximation to CI09's MAP
    • Recorded in response to a reversed polarity (neg) 40 ms [da]
  • CI09_Artefact_40da_pos.mat
    • Artefact based on closest approximation to CI09's MAP
    • Recorded in response to a standard polarity (pos) 40 ms [da]
       
• Artefact recordings are in '.mat' format (MATLAB, MathWorks)
  • Each '.mat' file is a 10988x2500 matrix
    • 10988 is the number of sample points
    • 2500 is the number of epochs (repetitions)

Artefacts recorded in: June 2018