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Evaluation of a Remote Microphone System with Tri-Microphone Beamformer
Jace Wolfe1, Mila Duke1, Erin Schafer2
1Hearts for Hearing Foundation, Oklahoma City, OK.
Journal of the American Academy of Audiology
|August 21, 2019
Summary
A new remote microphone system significantly improved speech understanding for children with hearing loss in noisy classrooms. This technology enhances listening comfort, sound quality, and speech intelligibility during small-group activities.
Area of Science:
- Audiology
- Speech-Language Pathology
- Educational Technology
Background:
- Children with hearing loss struggle with speech comprehension in noisy classrooms.
- Traditional remote microphones are often ineffective for small-group learning.
- A novel approach involves placing a microphone centrally for small-group communication.
Purpose of the Study:
- Compare speech recognition in children with hearing aids across three modes: omnidirectional (HA-O), automatic directional (HA-ADM), and HA-ADM with a "Small Group" remote microphone (HA-ADM-RM).
- Assess children's subjective listening preferences between HA-ADM and HA-ADM-RM conditions.
Main Methods:
- A repeated measures design evaluated performance in three technology conditions.
- Sentence recognition in noise was tested in a simulated small-group classroom setting.
- Participants were 15 children with moderate to moderately severe hearing loss.
Main Results:
- The "Small Group" remote microphone (HA-ADM-RM) significantly improved speech recognition by 24 and 21 percentage points compared to HA-O and HA-ADM, respectively.
- No significant difference in speech recognition was found between HA-O and HA-ADM without the remote microphone.
- Eleven of 14 participants preferred the HA-ADM-RM system.
Conclusions:
- The "Small Group" remote microphone technology enhances hearing performance in small-group learning activities.
- Objective and subjective measures show significant improvements in speech recognition and listening experience.
- Children preferred the remote microphone system for comfort, clarity, and noise reduction.
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