Publication result detail

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

MOKRÝ, O.; DEJDAR, P.; ČÍŽEK, M.; RAJMIC, P.; SCHIMMEL, J.; HORVÁTH, T.; MÜNSTER, P.; ČÍP, O.

Original Title

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

English Title

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

Type

WoS Article

Original Abstract

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.

English abstract

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.

Keywords

Distributed Acoustic Sensing; Michelson Interferometer; Speech Intelligibility; Speech Transmission Index; Speech-to-Text

Key words in English

Distributed Acoustic Sensing; Michelson Interferometer; Speech Intelligibility; Speech Transmission Index; Speech-to-Text

Authors

MOKRÝ, O.; DEJDAR, P.; ČÍŽEK, M.; RAJMIC, P.; SCHIMMEL, J.; HORVÁTH, T.; MÜNSTER, P.; ČÍP, O.

RIV year

2026

Released

09.02.2026

Publisher

Elsevier

Periodical

OPTICS COMMUNICATIONS

Number

608

State

Kingdom of the Netherlands

Pages from

1

Pages to

11

Pages count

11

URL

https://www.sciencedirect.com/science/article/pii/S0030401826001264

BibTex

@article{BUT201010,
  author="Ondřej {Mokrý} and Petr {Dejdar} and  {} and Pavel {Rajmic} and Jiří {Schimmel} and Tomáš {Horváth} and Petr {Münster} and Ondřej {Číp}",
  title="Possibilities and Limitations of Speech Acoustic Sensing Using Fiber Optics: Comparison of Interferometric and Distributed Approaches",
  journal="OPTICS COMMUNICATIONS",
  year="2026",
  number="608",
  pages="1--11",
  doi="10.1016/j.optcom.2026.132987",
  issn="0030-4018",
  url="https://www.sciencedirect.com/science/article/pii/S0030401826001264"
}