Acoustically Controlled Binaural Auditory Training with Vocal Duets: Assessment and Effectiveness

Area of Science:

• Auditory Neuroscience
• Speech and Hearing Sciences

Background:

• Auditory processing disorders (APDs) affect individuals' ability to interpret auditory information.
• Binaural auditory training (BAT) has shown promise in improving auditory skills.
• Vocal music, particularly duets, may offer unique benefits for auditory training.

Purpose of the Study:

• To evaluate the effectiveness of a novel binaural auditory training program using vocal duets (ATVD).
• To assess the impact of ATVD on auditory skills using behavioral and electrophysiological measures.
• To determine the long-term effects of ATVD by evaluating skill maintenance 3 months post-intervention.

Main Methods:

• An interventional, longitudinal study involving 10 adults with APDs and normal audiometric thresholds.
• Participants underwent ATVD using a cappella vocal stimuli from a public domain song.
• Training involved 30-minute sessions twice weekly, with the number of sessions ranging from 12 to 20.

Main Results:

• Behavioral tests showed improved left ear advantage and reduced errors in dichotic listening, alongside significant improvements in speech-in-noise and frequency pattern tests.
• Electrophysiological assessments revealed increased P3 amplitude in the left ear and reduced inter-peak latencies in auditory brainstem response tests.
• Observed improvements in auditory skills were maintained at the 3-month follow-up assessment.

Conclusions:

• Binaural auditory training with vocal duets (ATVD) is an effective intervention for individuals with auditory processing disorders.
• ATVD leads to measurable improvements in both behavioral and electrophysiological auditory function.
• The positive effects of ATVD on auditory skills are durable, persisting for at least 3 months after training cessation.