Remote Microphone Systems for Cochlear Implant Recipients in Small Group Settings

Area of Science:

• Audiology
• Biomedical Engineering
• Speech Processing

Background:

• Cochlear implant (CI) recipients often face challenges with speech recognition in noisy environments, particularly in small group settings with multiple speakers.
• Traditional remote microphone systems are limited as they typically transmit audio from only one talker, failing to capture multiple simultaneous speakers.

Purpose of the Study:

• To compare the effectiveness of two advanced remote microphone systems for improving speech recognition in noise for CI users in small group scenarios.
• Investigate the potential benefits of an adaptive multiple-microphone beamformer system versus a multi-talker network system.

Main Methods:

• Twenty CI recipients (ages 12-84) participated in sentence recognition tasks in noise.
• Testing involved three conditions: CI alone, adaptive multiple-microphone beamformer, and multi-talker network system.
• Speech and noise were presented from multiple loudspeakers at varying signal levels to simulate complex listening environments.

Main Results:

• Both remote microphone systems demonstrated significant improvements in speech recognition compared to the CI alone.
• The adaptive multiple-microphone beamformer system yielded improvements of 14-23 percentage points.
• The multi-talker network system provided greater improvements, ranging from 27-47 percentage points.

Conclusions:

• Both tested remote microphone systems enhance speech recognition in noise for CI recipients in small group settings.
• The multi-talker network remote microphone system offers superior performance compared to the adaptive multiple-microphone beamformer system for this listening condition.