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

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Abstract

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.

About the authors

M. V. Orlova

Bauman Moscow State Technical University

Email: manja254@yandex.ru
105005, Moscow, Russia

T. V. Gritsenko

Bauman Moscow State Technical University

Email: manja254@yandex.ru
105005, Moscow, Russia

A. A. Zhirnov

Bauman Moscow State Technical University

Email: manja254@yandex.ru
105005, Moscow, Russia

Yu. A. Konstantinov

Perm Federal Research Center, Ural Branch, Russian Academy of Sciences

Email: manja254@yandex.ru
614990, Perm, Russia

A. T. Turov

Perm Federal Research Center, Ural Branch, Russian Academy of Sciences

Email: manja254@yandex.ru
614990, Perm, Russia

A. B. Pnev

Bauman Moscow State Technical University

Email: manja254@yandex.ru
105005, Moscow, Russia

V. E. Karasik

Bauman Moscow State Technical University

Author for correspondence.
Email: manja254@yandex.ru
105005, Moscow, Russia

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Copyright (c) 2023 М.В. Орлова, Т.В. Гриценко, А.А. Жирнов, Ю.А. Константинов, А.Т. Туров, А.Б. Пнев, В.Е. Карасик