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Related Concept Videos

Design Example01:23

Design Example

643
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
643

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The Benefit of Remote Microphones Using Four Wireless Protocols.

Krishna S Rodemerk, Jason A Galster

    Journal of the American Academy of Audiology
    |September 4, 2015
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    Summary
    This summary is machine-generated.

    Four wireless remote microphone systems significantly improved speech recognition in noise for adults with hearing loss compared to hearing aids alone. These systems offer enhanced auditory performance across different wireless protocols.

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    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.