Clinical Evaluation of Frequency Allocation for Bimodal CI Users

OTHER

Experimental frequency allocation table (FAT) - 438 Hz

The modified cochlear implant program ("experimental FAT") changes which frequencies are presented to the cochlear implant. The experimental FAT frequency of 438 Hz will be loaded onto the subjects processor via the CI Select Mobile App. Subjects will use the experimental FAT for one month.

OTHER

Standard FAT - 188 Hz

All subjects will retain one program with the standard 188 Hz FAT. Subjects will use the standard FAT for one month.

Sound Quality Questionnaire Score while using standard 188 Hz FAT

Time frame: Baseline

A questionnaire will be given to the subjects to record their subjective thoughts regarding sound quality and satisfaction with both the experiment FAT and the standard FAT. Questionnaires will be administered double blind. Patients evaluate the 16-item questionnaire using a likert-scale (1-strongly disagree to 5-strongly agree). Lower scores indicate decreased sound quality and satisfaction, while higher scores indicate increased sound quality and satisfaction.

Sound Quality Questionnaire Score while using experimental 438 Hz FAT

Time frame: Behavioral Visit 2 (1 month post 438 Hz FAT adaptation)

A questionnaire will be given to the subjects to record their subjective thoughts regarding sound quality and satisfaction with both the experiment FAT and the standard FAT. Questionnaires will be administered double blind. Patients evaluate the 16-item questionnaire using a likert-scale (1-strongly disagree to 5-strongly agree). Lower scores indicate decreased sound quality and satisfaction, while higher scores indicate increased sound quality and satisfaction.

Sound Quality Questionnaire Score while using standard 188 Hz FAT

Time frame: Behavioral Visit 3 (1 month post 188 Hz FAT re-adaptation)

A questionnaire will be given to the subjects to record their subjective thoughts regarding sound quality and satisfaction with both the experiment FAT and the standard FAT. Questionnaires will be administered double blind. Patients evaluate the 16-item questionnaire using a likert-scale (1-strongly disagree to 5-strongly agree). Lower scores indicate decreased sound quality and satisfaction, while higher scores indicate increased sound quality and satisfaction.

The consonant-nucleus-consonant (CNC) word list score while using standard 188 Hz FAT

Time frame: Baseline

CNC word lists are used to evaluate the speech perception abilities of people with hearing impairments and cochlear implant users. A CNC score above 50% postoperatively indicates that a patient can communicate without relying too much on lip reading, sign language, or written communication.

CNC word list score while using standard 188 Hz FAT

Time frame: Behavioral Visit 2 (1 month post 438 Hz FAT adaptation)

CNC word lists are used to evaluate the speech perception abilities of people with hearing impairments and cochlear implant users. A CNC score above 50% postoperatively indicates that a patient can communicate without relying too much on lip reading, sign language, or written communication.

CNC word list score while using standard 188 Hz FAT

Time frame: Behavioral Visit 3 (1 month post 188 Hz FAT re-adaptation)

CNC word lists are used to evaluate the speech perception abilities of people with hearing impairments and cochlear implant users. A CNC score above 50% postoperatively indicates that a patient can communicate without relying too much on lip reading, sign language, or written communication.

CNC word list score while using experimental 438 Hz FAT

Time frame: Baseline

CNC word lists are used to evaluate the speech perception abilities of people with hearing impairments and cochlear implant users. A CNC score above 50% postoperatively indicates that a patient can communicate without relying too much on lip reading, sign language, or written communication.

CNC word list score while using experimental 438 Hz FAT

Time frame: Behavioral Visit 2 (1 month post 438 Hz FAT adaptation)

CNC word lists are used to evaluate the speech perception abilities of people with hearing impairments and cochlear implant users. A CNC score above 50% postoperatively indicates that a patient can communicate without relying too much on lip reading, sign language, or written communication.

CNC word list score while using experimental 438 Hz FAT

Time frame: Behavioral Visit 3 (1 month post 188 Hz FAT re-adaptation)

CNC word lists are used to evaluate the speech perception abilities of people with hearing impairments and cochlear implant users. A CNC score above 50% postoperatively indicates that a patient can communicate without relying too much on lip reading, sign language, or written communication.

Bamford-Kowal-Bench (BKB-SIN) speech-in-noise score using standard 188 Hz FAT

Time frame: Baseline

The BKB-SIN speech-in-noise test measures speech perception in noise by assessing a listener's signal-to-noise ratio (SNR) loss. The test results are presented as the SNR loss, which is the amount the signal-to-noise ratio needs to be increased for the listener to correctly repeat 50% of the sentences. A higher SNR loss indicates more difficulty hearing.

Bamford-Kowal-Bench (BKB-SIN) speech-in-noise score using standard 188 Hz FAT

Time frame: Behavioral Visit 2 (1 month post 438 Hz FAT adaptation)

The BKB-SIN speech-in-noise test measures speech perception in noise by assessing a listener's signal-to-noise ratio (SNR) loss. The test results are presented as the SNR loss, which is the amount the signal-to-noise ratio needs to be increased for the listener to correctly repeat 50% of the sentences. A higher SNR loss indicates more difficulty hearing.

Bamford-Kowal-Bench (BKB-SIN) speech-in-noise score using standard 188 Hz FAT

Time frame: Behavioral Visit 3 (1 month post 188 Hz FAT re-adaptation)

The BKB-SIN speech-in-noise test measures speech perception in noise by assessing a listener's signal-to-noise ratio (SNR) loss. The test results are presented as the SNR loss, which is the amount the signal-to-noise ratio needs to be increased for the listener to correctly repeat 50% of the sentences. A higher SNR loss indicates more difficulty hearing.

Bamford-Kowal-Bench (BKB-SIN) speech-in-noise score using experimental 438 Hz FAT

Time frame: Baseline

The BKB-SIN speech-in-noise test measures speech perception in noise by assessing a listener's signal-to-noise ratio (SNR) loss. The test results are presented as the SNR loss, which is the amount the signal-to-noise ratio needs to be increased for the listener to correctly repeat 50% of the sentences. A higher SNR loss indicates more difficulty hearing.

Bamford-Kowal-Bench (BKB-SIN) speech-in-noise score using experimental 438 Hz FAT

Time frame: Behavioral Visit 2 (1 month post 438 Hz FAT adaptation)

The BKB-SIN speech-in-noise test measures speech perception in noise by assessing a listener's signal-to-noise ratio (SNR) loss. The test results are presented as the SNR loss, which is the amount the signal-to-noise ratio needs to be increased for the listener to correctly repeat 50% of the sentences. A higher SNR loss indicates more difficulty hearing.

Bamford-Kowal-Bench (BKB-SIN) speech-in-noise score using experimental 438 Hz FAT

Time frame: Behavioral Visit 3 (1 month post 188 Hz FAT re-adaptation)

The BKB-SIN speech-in-noise test measures speech perception in noise by assessing a listener's signal-to-noise ratio (SNR) loss. The test results are presented as the SNR loss, which is the amount the signal-to-noise ratio needs to be increased for the listener to correctly repeat 50% of the sentences. A higher SNR loss indicates more difficulty hearing.

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