22.2 A Rugged Wearable Modular ExG Platform Employing a Distributed Scalable Multi-Channel FM-ADC Achieving 101dB Input Dynamic Range and Motion-Artifact Resilience

Warchall, Julian; Theilmann, Paul; Ouyang, Yuxuan; Garudadri, Harinath; Mercier, Patrick P.

doi:10.1109/isscc.2019.8662407

Cited by 4 publications

(2 citation statements)

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“…Our development of OSP has resulted in novel developments in embedded systems design [10], portable electrophysiology [11], [12], adaptive filtering [13], [14], and other areas not yet published. Yet, the primary novelty of OSPand its primary value to the community-is in its system design as a whole, and the capabilities it offers to researchers and users as a result of this design.…”

Section: Have Been Under Developmentmentioning

confidence: 99%

“…OSP incorporates a wearable biopotential acquisition system, which can run alongside the HA processing, and which only requires one small four-wire cable from the electrodes to the PCD. The design of this system is based upon the distributed FM-ADC architecture in [12]. The active electrodes feature high input dynamic range of around 100dB and no input gain stage.…”

Section: B System Designmentioning

confidence: 99%

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A Wearable, Extensible, Open-Source Platform for Hearing Healthcare Research

et al. 2019

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Hearing loss is one of the most common conditions affecting older adults worldwide. Frequent complaints from the users of modern hearing aids include poor speech intelligibility in noisy environments and high cost, among other issues. However, the signal processing and audiological research needed to address these problems has long been hampered by proprietary development systems, underpowered embedded processors, and the difficulty of performing tests in real-world acoustical environments. To facilitate existing research in hearing healthcare and enable new investigations beyond what is currently possible, we have developed a modern, open-source hearing research platform, Open Speech Platform (OSP). This paper presents the system design of the complete OSP wearable platform, from hardware through firmware and software to user applications. The platform provides a complete suite of basic and advanced hearing aid features which can be adapted by researchers. It serves web apps directly from a hotspot on the wearable hardware, enabling users and researchers to control the system in real time. In addition, it can simultaneously acquire high-quality electroencephalography (EEG) or other electrophysiological signals closely synchronized to the audio. All of these features are provided in a wearable form factor with enough battery life for hours of operation in the field. INDEX TERMS Hearing aids (HAs), wearable computers, speech processing, field programmable gate arrays (FPGAs), electrophysiology (EEG), system-level design, open source hardware, embedded software, Internet of Things, research initiatives.

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