Archives of Acoustics, 45, 2, pp. 349–357, 2020
10.24425/aoa.2020.133155

Underwater Noises of Open-Circuit Scuba Diver

Vladimir KORENBAUM
V.I. Il’ichev Pacific Oceanological Institute, Far Eastern Branch Russian Academy of Sciences
Russian Federation

Anatoly KOSTIV
V.I. Il’ichev Pacific Oceanological Institute, Far Eastern Branch Russian Academy of Sciences
Russian Federation

Sergey GOROVOY
1) V.I. Il’ichev Pacific Oceanological Institute, Far Eastern Branch Russian Academy of Sciences 2) Engineering School, Far Eastern Federal University
Russian Federation

Veniamin DOROZHKO
V.I. Il’ichev Pacific Oceanological Institute, Far Eastern Branch Russian Academy of Sciences
Russian Federation

Anton SHIRYAEV
V.I. Il’ichev Pacific Oceanological Institute, Far Eastern Branch Russian Academy of Sciences
Russian Federation

The features of respiratory noises and noises of fins for open-circuit scuba divers, indicating a multipole character of noises emission, are specified in cameral conditions. It demonstrates a possibility to detect low-frequency components of noises of fins with pressure gradient sensor in near field. A possibility of estimating the respiratory rate of an open-circuit scuba diver is demonstrated at distances up to 100 m in real sea. It gives an opportunity of estimating the bearing (time delay in a pair of hydrophones) for the open-circuit scuba diver by respiratory noises at distances up to 150 m in real sea. Thus, low-frequency underwater noises of open-circuit scuba divers may be successfully applied to monitor the safety of diving and to prevent waterside intrusion by trespassers.
Keywords: underwater acoustics; diver; respiratory noises; noises of fins; open-circuit scuba; breathing apparatus; detection; monitoring; bearing
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DOI: 10.24425/aoa.2020.133155