The Benefit of Remote Microphones Using Four Wireless Protocols.

Area of Science:

• Audiology
• Hearing Science
• Speech-Language Pathology

Background:

• Personal remote microphone systems are known to benefit speech recognition in adults with hearing loss.
• Advancements in wireless technology have led to diverse audio transmission protocols compatible with hearing aids.
• A comparison of the speech recognition performance across different wireless protocols in remote microphone systems is lacking.

Purpose of the Study:

• To evaluate and compare the speech recognition benefits of four distinct commercial remote microphone systems.
• Each system utilizes a different wireless audio transmission protocol.

Main Methods:

• A repeated-measures design study involving 16 adults (ages 52-81) with mild to severe sensorineural hearing loss.
• Participants were tested with hearing aids alone and with four remote microphone systems (FM, 900 MHz, 2.4 GHz, Bluetooth® with near-field magnetic induction).
• Speech recognition was assessed using the adaptive Hearing in Noise Test (HINT) at 6' and 12' distances, measuring the signal-to-noise ratio (SNR-50).

Main Results:

• All four remote microphone systems statistically enhanced speech recognition in noise compared to unaided and hearing aid-only conditions.
• These improvements were observed across all tested wireless transmission protocols.
• Benefits were consistent at both 6' and 12' distances from the sound source.

Conclusions:

• Remote microphone systems with varying wireless transmission protocols significantly improve speech recognition in noise for adults with hearing loss.
• The findings highlight the effectiveness of these assistive listening devices over hearing aids alone.