Results 151 to 160 of about 72,121 (192)

Underwater noise produced by rainfall

The Journal of the Acoustical Society of America, 1987
When a liquid drop falling through the air strikes a flat horizontal surface, there are acoustic emissions associated with this impact in both the air and the liquid [G. J. Franz, J. Acoust. Soc. Am. 31, 1080 (1959)]. Under certain conditions, a small air bubble can be entrained in the liquid by the impacting drop and stimulated into volume pulsations ...
H. C. Pumphrey, L. A. Crum
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Impulsive Underwater Noise

This document focuses on the data flow into the Impulsive Underwater Noise database, which hosts underwater noise collected continuously over a period of time. The data hosted at ICES are primarily collected by research institutions within HELCOM and/or OSPAR member countries.
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Waves, Bubbles, Noise and Underwater Communications

2008
Abstract : The long-term goal is to develop physical models for the role of surface waves and bubbles on the performance of high-frequency, coherent underwater communications systems. These models will be used as the basis of improved signal processing algorithms for underwater acoustic modems, and to develop predictive algorithms for the performance ...
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Continuous Underwater Noise

This document focuses on the data flow into the Continuous Underwater Noise database, which hosts underwater noise collected continuously over a period of time. The data hosted at ICES are primarily collected by research institutions within HELCOM and/or OSPAR member countries. The Continuous Underwater Noise database is governed by HELCOM EG Noise and
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Underwater Photography Noise Cancellation

Proceedings of the 5th International Conference on Information Management & Machine Intelligence, 2023
Devjyoti Mohanty, Vaibhav Jain, Nithya Paranthaman R   +2 more
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Modeling noise from underwater vehicles

The Journal of the Acoustical Society of America, 2011
To predict and control the radiated noise from underwater vehicles can be a complicated task. As opposed to a surface ship with a hull surrounding the machinery sources, these vehicles have multiple acoustic sources in direct contact with water. Any surrounding hull-type structure, excited by the source, then also radiates into the acoustic media. This
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Review of Underwater Acoustics: Noise

The Journal of the Acoustical Society of America, 1971
The purposes, problems, and progress of radiated-noise, self-noise, and ambient-noise research are reviewed. Purposes are related primarily to national defense, but applications to fishery and to the utilization of other natural resources are also noted.
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Underwater Ambient Noise

Acoustics Today, 2007
Peter H. Dahl, James H. Miller, Douglas H. Cato, Rex K. Andrew   +3 more
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Sources of Underwater Rain Noise

1993
This is a review of recent work on the underwater sound generated by rainfall. A brief history of the subject is followed by a discussion of the different ways in which a drop impact can produce sound and the relevance of each mechanism to rain noise. Experimental details are omitted for the sake of brevity.
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Classification of ships using underwater radiated noise

COMSIG 88@m_Southern African Conference on Communications and Signal Processing. Proceedings, 1989
Concentrating mainly on the signal processing and physical models behind the algorithms used to classify ships by their underwater-radiated noise, the physical model for cavitation is expanded to include the losses by acoustical radiation and the heat transfer from the vapor to the fluid. The resulting equation allows one to find the characteristics of
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