Consonant production in children receiving a multichannel cochlear implant

Area of Science:

• Audiology
• Speech-Language Pathology
• Biomedical Engineering

Background:

• Cochlear implants are crucial for hearing restoration in deaf individuals.
• Understanding the impact of cochlear implants on speech production is vital for rehabilitation.
• The Nucleus WSP-III cochlear implant is a device used in clinical trials for pediatric hearing loss.

Purpose of the Study:

• To investigate consonant production in children with cochlear implants.
• To compare pre-implant and post-implant speech sound production.
• To analyze the influence of cochlear implantation on specific consonant types and articulation features.

Main Methods:

• Speech samples were collected from 29 children before and one year after receiving the Nucleus WSP-III cochlear implant.
• Consonant production was analyzed for various types (stop, nasal, fricative, glide) and features (voicing, place of articulation).
• Data were compared to normative data and analyzed for specific sound influences.

Main Results:

• A significant increase in the production of stop, nasal, fricative, and glide consonants was observed post-implantation.
• Children used more voiced stops than voiceless stops, and more voiceless fricatives than voiced fricatives.
• Visible places of articulation were favored over less visible ones, with some sounds showing greater implant influence than others.

Conclusions:

• Nucleus WSP-III cochlear implantation leads to significant improvements in consonant production in children.
• The pattern of consonant use post-implantation shows specific preferences for voicing and place of articulation.
• The complex relationship between cochlear implants and spontaneous speech development warrants further investigation.