Possibilities and Limitations of Speech Acoustic Sensing Using Fiber Optics: Comparison of Interferometric and Distributed Approaches

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F26%3A0201010" target="_blank" >RIV/00216305:26220/26:0201010 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0030401826001264" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0030401826001264</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.optcom.2026.132987" target="_blank" >10.1016/j.optcom.2026.132987</a>

Result language
angličtina
Original language name
Possibilities and Limitations of Speech Acoustic Sensing Using Fiber Optics: Comparison of Interferometric and Distributed Approaches
Original language description
The paper investigates the feasibility of capturing human speech using standard telecommunication optical fibers in real-world installations. We compare three acoustic sensing approaches—the Michelson interferometer (MI) and the distributed acoustic sensing (DAS) in intensity (single-pulse) and phase (dual-pulse) modes—and evaluate their performance using the Speech Transmission Index, the Short-Time Objective Intelligibility, and the neurogram similarity index measure. Results show that while all systems can detect the presence and temporal structure of speech, none technique of them achieved intelligible reconstruction under realistic conditions. The MI delivered the highest speech quality metrics, and dual-pulse mode of DAS outperformed the single-pulse mode in terms of sensitivity and the signal-to-noise ratio. The findings highlight the current limitations of fiber-based acoustic sensing for direct speech monitoring but confirm its potential for applications such as speaker activity detection and event classification.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20200 - Electrical engineering, Electronic engineering, Information engineering

Project
<a href="/en/project/VJ01010035" target="_blank" >VJ01010035: Security risks of photonic communication networks</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2026
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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