Speech discrimination in children: auditory and auditory/visual processing with binaural and monaural presentation.

Area of Science:

• Audiology
• Speech-Language Pathology
• Pediatric Hearing

Background:

• Binaural hearing preserves crucial auditory cues for speech perception.
• Understanding speech in noise is challenging for children, particularly those with hearing impairments.

Purpose of the Study:

• To evaluate the binaural advantage in word intelligibility for normal-hearing children.
• To compare auditory-only versus auditory/visual presentation conditions.
• To determine the impact of signal-to-noise ratios on binaural benefit.

Main Methods:

• The Word Intelligibility by Picture Identification test was administered to 30 children (ages 6-14).
• Electret microphones recorded responses to binaural and monaural stimulation.
• Auditory and auditory/visual conditions were tested across six signal-to-noise ratios (-12 to +3 dB).

Main Results:

• A significant binaural advantage for speech intelligibility was observed.
• The largest intelligibility improvement (21%) occurred in auditory-only mode at -6 dB S/N.
• In auditory/visual mode, a 20.8% improvement was noted at -9 dB S/N.
• The binaural advantage diminished at high and low signal-to-noise ratios.

Conclusions:

• Binaural hearing provides substantial speech intelligibility benefits for children.
• These findings have implications for fitting hearing aids to individuals with minimal residual hearing.
• Optimizing binaural amplification strategies can enhance communication for the hearing impaired.