Spectral Resolution and Speech Perception in Cochlear Implanted School-Aged Children

Area of Science:

• Audiology
• Neuroscience
• Speech-Language Pathology

Background:

• Cochlear implantation (CI) in prelingually deaf infants aims to develop spoken language, but outcomes vary.
• Assessing CI efficacy in young children is challenging due to limitations in speech perception testing.
• In postlingually deaf adults, speech perception is linked to spectral resolution, comprising frequency resolution (FR) and spectral modulation sensitivity (SMS).

Purpose of the Study:

• To investigate spectral resolution abilities (FR and SMS) in prelingually deaf children with cochlear implants (cCI).
• To compare FR and SMS in cCI with postlingually deaf adults (aCI).
• To determine the correlation between spectral resolution and speech identification (vowel and consonant) in cCI.

Main Methods:

• A cross-sectional study involving in-person, booth testing.
• Spectral ripple discrimination (SRD) task to measure FR and SMS from spectral modulation transfer functions.
• Correlation analysis between SRD performance and measures of vowel and consonant identification.

Main Results:

• Fifteen cCI and 13 aCI participants were included.
• FR and SMS were found to be similar between the cCI and aCI groups.
• Improved FR was associated with better speech identification across most measures in cCI.

Conclusions:

• Prelingually deaf children with CI exhibit adult-like FR and SMS.
• FR is correlated with speech identification abilities in cCI.
• FR may serve as a valuable metric for assessing cochlear implant efficacy in pediatric users.