Search Results - "Dahl, Peter H"

Vector acoustic properties of underwater noise from impact pile driving measured within the water column by Dahl, Peter H., MacGillivray, Alexander, Racca, Roberto

“…Vector acoustic properties of the underwater noise originating from impact pile driving on steel piles has been studied, including the identification of…”
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Vector acoustic and polarization properties of underwater ship noise by Dahl, Peter H., Bonnel, Julien

“…Vector acoustic field properties measured during the 2017 Seabed Characterization Experiment (SBCEX17) are presented. The measurements were made using the…”
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On the equivalence of scalar-pressure and vector-based acoustic dosage measures as derived from time-limited signal waveformsa by Dahl, Peter H., Bonnel, Julien, Dall'Osto, David R.

“…The dynamic (acoustic pressure) and kinematic (acoustic acceleration and velocity) properties of time-limited signals are studied in terms of acoustic dose…”
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Potential and kinetic energy of underwater noise measured below a passing ship and response to sub-bottom layering by Dahl, Peter H., Dall'Osto, David R.

“…Observed near the seafloor, broadband noise emissions from a vessel passing directly above exhibit frequency bands where potential acoustic energy is greater…”
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Range-Dependent Inversion for Seabed Parameters Using Vector Acoustic Measurements of Underwater Ship Noise by Dahl, Peter H., Dall'Osto, David R.

“…The Intensity Vector Autonomous Recorder (IVAR) measures acoustic particle velocity and pressure simultaneously. IVAR was deployed on the seabed during the…”
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Coherent reflection recovery in scattering from the ocean surface using the frequency-difference autoproducta by Joslyn, Nicholas J., Dahl, Peter H., Dowling, David R.

“…The coherence of rough sea-surface-scattered acoustic fields decreases with increasing frequency. The frequency-difference autoproduct, a quadratic product of…”
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Seabed and range estimation of impulsive time series using a convolutional neural network by Van Komen, David F., Neilsen, Tracianne B., Howarth, Kira, Knobles, David P., Dahl, Peter H.

“…In ocean acoustics, many types of optimizations have been employed to locate acoustic sources and estimate the properties of the seabed. How these tasks can…”
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Estimation of seabed properties and range from vector acoustic observations of underwater ship noise by Dahl, Peter H., Dall'Osto, David R.

“…The Intensity Vector Autonomous Recorder (IVAR) simultaneously measures acoustic particle velocity and pressure. IVAR was deployed during the 2017 Seabed…”
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Coherence of the frequency-difference autoproduct deduced from high-frequency acoustic fields scattered from a rough sea surfacea by Joslyn, Nicholas J., Dahl, Peter H., Dowling, David R.

“…The prevalence of random scattering from a rough ocean surface increases with increasing χ = k h   cos   θ , where k is the acoustic wavenumber, h is the…”
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Active intensity vortex and stagnation point singularities in a shallow underwater waveguide by Dahl, Peter H., Dall'Osto, David R., Hodgkiss, William S.

“…Vector acoustic properties of a narrowband acoustic field are observed as a function of range from a source towed in waters of depth 77 m on the New England…”
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Vector Acoustic Analysis of Time-Separated Modal Arrivals From Explosive Sound Sources During the 2017 Seabed Characterization Experiment by Dahl, Peter H., Dall'Osto, David R.

“…The Intensity Vector Autonomous Recorder (IVAR) is a system that records four coherent channels of acoustic data continuously: one channel for acoustic…”
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Underwater Mach wave radiation from impact pile driving: Theory and observation by Reinhall, Per G., Dahl, Peter H.

“…The underwater noise from impact pile driving is studied using a finite element model for the sound generation and parabolic equation model for propagation…”
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Observations of the R reflector and sediment interface reflection at the Shallow Water '06 Central Site by JEE WOONG CHOI, DAHL, Peter H, GOFF, John A

“…Acoustic bottom-interacting measurements from the Shallow Water '06 experiment experiment (frequency range 1-20 kHz) are presented. These are co-located with…”
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Trends in low-frequency underwater noise off the Oregon coast and impacts of COVID-19 pandemic by Dahl, Peter H., Dall'Osto, David R., Harrington, Michael J.

“…Approximately six years of underwater noise data recorded from the Regional Cabled Array network are examined to study long-term trends. The data originate…”
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Polarization of ocean acoustic normal modes by Bonnel, Julien, Flamant, Julien, Dall'Osto, David R., Le Bihan, Nicolas, Dahl, Peter H.

“…In ocean acoustics, shallow water propagation is conveniently described using normal mode propagation. This article proposes a framework to describe the…”
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On the underwater sound field from impact pile driving: Arrival structure, precursor arrivals, and energy streamlines by Dahl, Peter H., Dall'Osto, David R.

“…Underwater noise from impact pile driving is studied through measurements using a vertical line array (VLA) placed at range 120 m from the pile source (water…”
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Forward scattering from the sea surface and the van Cittert-Zernike theorem by Dahl, Peter H

“…The van Cittert-Zernike theorem is used to generate models for the spatial coherence of a sound field that has been forward scattered from the sea surface. The…”
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Flow-noise and turbulence in two tidal channels by Bassett, Christopher, Thomson, Jim, Dahl, Peter H, Polagye, Brian

“…Flow-noise resulting from oceanic turbulence and interactions with pressure-sensitive transducers can interfere with ambient noise measurements. This noise…”
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Injuries to Pacific mackerel (Scomber japonicus) from underwater explosions by Bowman, Victoria, Jenkins, A Keith, Dahl, Peter H, Kotecki, Sarah E, Casper, Brandon M, Boerger, Christiana, Smith, Michael E, Popper, Arthur N

“…Abstract This study expands previous work examining the effects on fishes from exposure to a single 4.5 kg underwater explosive detonation. Experiments were…”
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Physical effects of sound exposure from underwater explosions on Pacific mackerel ( Scomber japonicus ): Effects on non-auditory tissues by Jenkins, A. Keith, Dahl, Peter H., Kotecki, Sarah E., Bowman, Victoria, Casper, Brandon, Boerger, Christiana, Popper, Arthur N.

“…Underwater explosions from activities such as construction, demolition, and military activities can damage non-auditory tissues in fishes. To better understand…”
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