Influence of microphone directionality and control of the amount of electric current level on speech perception and frequency discrimination in cochlear implant users

Not Applicable

• Conditions: Hearing Loss, Bilateral; Persons With Hearing Impairments; deafness; M01.150.750; C09.218.458.341.374; C09.218.458.341.186

• Registration Number: RBR-4pjt82
• Lead Sponsor: Obras Sociais Irmã Dulce

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2020-01-02
• Last Update Posted: 29 May 2023

Recruitment & Eligibility

• Status: Recruitment completed
• Sex: Not specified
• Target Recruitment: Not specified

Inclusion Criteria

Age 18 years and over; bilateral severe and / or deep sensorineural hearing loss; hearing loss of postlingual origin; limited benefit with the use of hearing aids (sentence recognition threshold below 50% in the best ear with amplification); first cochlear implant surgery; absence of anatomical contraindications; fluency in Portuguese (Brazil), including reading and writing; signature of the Informed Consent Form.

Exclusion Criteria

Partial insertion of the electrodes in the cochlea (more than four electrodes out of the cochlea); patients who were in a closed set (ie, could not have any speech recognition without visual cues) at the time of the speech tests.

Study & Design

• Study Type: Intervention
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Improved speech perception in the presence of competitive noise using speech omni directionality, as measured by the Portuguese Sentence List test, after 9 months of cochlear implant activation, with speech recognition greater than 40%.

Secondary Outcome Measures

Name	Time	Method
Improved speech perception in the presence of competitive noise using opti omni directionality, as measured by the Portuguese Sentence List test, after 3 months of cochlear implant activation, with speech recognition greater than 30%.