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Related Concept Videos

Hearing01:31

Hearing

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When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
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The Cochlea01:13

The Cochlea

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The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
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Related Experiment Video

Updated: May 16, 2025

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

Published on: March 24, 2023

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SmartHeaP- A High-Level Programmable and Customized Hearing Aid System on Chip Integrated in a Research Hearing

Jens Karrenbauer, Sven Schonewald, Simon Klein

    IEEE Transactions on Biomedical Circuits and Systems
    |April 4, 2025
    PubMed
    Summary

    Researchers developed a low-power, behind-the-ear hearing aid prototype for real-world studies. This portable device, powered by a new Smart Hearing Aid Processor (SmartHeaP) System on Chip (SoC), enables advanced hearing algorithms for improved user experiences.

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    Area of Science:

    • Electrical Engineering and Computer Science
    • Biomedical Engineering
    • Audiology

    Background:

    • Hearing loss is a prevalent sensory impairment affecting social interaction.
    • Existing hearing aid research is limited by market restrictions and lack of portable platforms.
    • Need for adaptable, personalized signal processing in behind-the-ear (BTE) hearing aids for real-world studies.

    Purpose of the Study:

    • To introduce a fully embedded, BTE-sized hearing aid research platform.
    • To present a novel, low-power System on Chip (SoC) for advanced hearing algorithms.
    • To enable real-world studies on personalized hearing aid signal processing.

    Main Methods:

    • Development of a compact, 5-gram BTE hearing aid prototype with Bluetooth Low Energy (BLE) and Near Field Magnetic Induction (NFMI).
    • Design of a custom mixed-signal application-specific integrated circuit (ASIC), the Smart Hearing Aid Processor (SmartHeaP) SoC.
    • Fabrication of the SoC using 22nm fully-depleted silicon-on-insulator (FD-SOI) technology with an adaptive body bias (ABB) unit and two ASIPs.

    Main Results:

    • The prototype offers up to nine hours of operation with state-of-the-art hearing algorithms.
    • The SmartHeaP SoC achieves remarkably low power consumption (1.45 mW @ 5 MHz) for demanding algorithms like binaural beamforming.
    • The SoC is high-level programmable, specifically tailored for hearing aid applications.

    Conclusions:

    • The presented BTE hearing aid prototype and SmartHeaP SoC provide a viable platform for advancing hearing aid research.
    • This innovation facilitates real-world studies, potentially leading to enhanced personalized hearing solutions.
    • The low-power, high-performance SoC is crucial for enabling sophisticated, portable hearing aid functionalities.