Investigation of the Optimal Parameters of the Distributed Fiber Microphone Circuit Based on φ-OTDR for Speech Recognition

A study of the optimal parameters of a distributed fiber microphone circuit based on a laboratory setup of a phase-sensitive optical reflectometer (φ-OTDR), which reproduces the work of φ-OTDR at one point, has been carried out. Various schemes for constructing a microphone based on φ-OTDR and vario...

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Bibliographic Details
Published in:Instruments and experimental techniques (New York) 2023-10, Vol.66 (5), p.832-836
Main Authors: Orlova, M. V., Gritsenko, T. V., Zhirnov, A. A., Konstantinov, Yu. A., Turov, A. T., Pnev, A. B., Karasik, V. E.
Format: Article
Language:English
Subjects:
Analog circuits
Analog to digital converters
Biology
Electrical Engineering
Measurement Science and Instrumentation
Medicine
Parameters
Physical Chemistry
Physical Instruments for Ecology
Physics
Physics and Astronomy
Reflectometers
Sampling
Sentences
Speech recognition
Voice recognition
Words (language)
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Summary:A study of the optimal parameters of a distributed fiber microphone circuit based on a laboratory setup of a phase-sensitive optical reflectometer (φ-OTDR), which reproduces the work of φ-OTDR at one point, has been carried out. Various schemes for constructing a microphone based on φ-OTDR and various sampling rates of the analog-to-digital converter are investigated. The optimal configuration of the φ-OTDR circuit is substantiated, which made it possible to ensure high quality of human speech recognition during voice recording by the proposed method with a sampling frequency of 40 kHz. In a standard phrase based on Harvard sentences containing 80 words, 71 words were recognized, i.e., 88.75% of their total number.
ISSN:0020-4412
1608-3180
DOI:10.1134/S0020441223050202