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Articles by David R. Dall'Osto
(a) Nascent network of KB source and receiver locations. Station ALOHA...
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KB source 2021 test transmission (Tx) schedule with varying source...
Context 1 ... a 20 min duration signal, the 44th period is not transmitted entirely. The signals analyzed in this letter are test Tx, which are listed in Table 2. ... Context 2 ... acoustic signal Tx numbers 1-4 listed in Table 2 Receiver signal-to-noise ratio (SNR) 21.9 20.2 dB between 15 and 20 s relative time in Figs. 2(a) and 2(e). ... Context 3 ... a 20 min duration signal, the 44th period is not transmitted entirely. The signals analyzed in this letter are test Tx, which are listed in Table 2. ...
Nicholas C. Durofchalk's research works
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Basin scale coherence of Kauai-Beacon m-sequence transmissions received at Wake Island and Monterey, CA
References 1 M. A. McDonald, J. A. Hildebrand, and S. Mesnick, “Worldwide decline in tonal frequencies of blue whale songs,” Endang. Spec. Res. 9(1), 13–21 (2009). 2 M. Gassmann, S. M. Wiggins, and J. A. Hildebrand, “Deep-water measurements of container ship radiated noise signatures and directionality,” J. Acoust. Soc. Am. 142(3), 1563–1574 (2017). 3 T. G. Birdsall and K. Metzger, “Factor inverse matched filtering,” J. Acoust. Soc. Am. 79(1), 91–99 (1986). 4 W. Munk, P. Worcester, and C.
Potential and kinetic energy of underwater noise measured below a passing ship and response to sub-bottom layering
When a vessel passes directly above, underwater noise emissions originating from the vessel can dominate the sound field below. In such conditions where sound propagation is nearly vertical, the sound field is reinforced by multiple reflections from the seafloor and sea surface, establishing a standing wave. Potential energy can be an order of magnitude greater than kinetic energy in certain frequency bands with the opposite occurring in neighboring bands.
Polarization of ocean acoustic normal modes
Sound can be described with thermodynamic variables, the most common being pressure p, or kinematic flow variables such as particle acceleration a and velocity v. All of these continuous field variables represent, in the linear acoustic regime, small perturbations from their background values. For example, in a static fluid (a common approximation for sea water), p and v are related through the linearized Euler equation, with ρ the ocean density and t the time.
Trends in low-frequency underwater noise off the Oregon coast and impacts of COVID-19 pandemica)
Approximately six years of underwater noise data recorded from the Regional Cabled Array network are examined to study long-term trends. The data originate from station HYS14 located 87 km offshore of Newport, OR. The results indicate that the third-octave band level centered at 63 Hz and attributable to shipping activity is reduced in the spring of 2020 by about 1.6 dB relative to the mean of the prior five years, owing to the reduced economic activity initiated by the COVID-19 pandemic.
David R. Dall'Osto's research works
What is this page? This page lists the scientific contributions of an author, who either does not have a ResearchGate profile, or has not yet added these contributions to their profile. It was automatically created by ResearchGate to create a record of this author's body of work. We create such pages to advance our goal of creating and maintaining the most comprehensive scientific repository possible.
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