Efficient modeling of range-dependent ray convergence effects in propagation and reverberation

Harrison, Chris H.

doi:10.1121/1.4919335

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Hybrid models are also used, applying combinations of the above (e.g. Harrison, ; Hovem, Tronstad, Karlsen, & Løkkeborg, ; Sertlek, ; Sertlek, Slabbekoorn, ten Cate, & Ainslie, ).…”

Section: The Auditory World Of Fishesmentioning

confidence: 99%

Population‐level consequences of seismic surveys on fishes: An interdisciplinary challenge

Slabbekoorn

Dalen

Haan³

et al. 2019

Fish and Fisheries

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Offshore activities elevate ambient sound levels at sea, which may affect marine fauna. We reviewed the literature about impact of airgun acoustic exposure on fish in terms of damage, disturbance and detection and explored the nature of impact assessment at population level. We provided a conceptual framework for how to address this interdisciplinary challenge, and we listed potential tools for investigation. We focused on limitations in data currently available, and we stressed the potential benefits from cross‐species comparisons. Well‐replicated and controlled studies do not exist for hearing thresholds and dose–response curves for airgun acoustic exposure. We especially lack insight into behavioural changes for free‐ranging fish to actual seismic surveys and on lasting effects of behavioural changes in terms of time and energy budgets, missed feeding or mating opportunities, decreased performance in predator‐prey interactions, and chronic stress effects on growth, development and reproduction. We also lack insight into whether any of these effects could have population‐level consequences. General “population consequences of acoustic disturbance” (PCAD) models have been developed for marine mammals, but there has been little progress so far in other taxa. The acoustic world of fishes is quite different from human perception and imagination as fish perceive particle motion and sound pressure. Progress is therefore also required in understanding the nature and extent to which fishes extract acoustic information from their environment. We addressed the challenges and opportunities for upscaling individual impact to the population, community and ecosystem level and provided a guide to critical gaps in our knowledge.

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“…Hybrid models are also used, applying combinations of the above (e.g. Harrison, ; Hovem, Tronstad, Karlsen, & Løkkeborg, ; Sertlek, ; Sertlek, Slabbekoorn, ten Cate, & Ainslie, ).…”

Section: The Auditory World Of Fishesmentioning

confidence: 99%

Population‐level consequences of seismic surveys on fishes: An interdisciplinary challenge

Slabbekoorn

Dalen

Haan³

et al. 2019

Fish and Fisheries

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Comparison of measured and modelled reverberation and echo level in littoral waters

Sovik

Hjelmervik

2017

OCEANS 2017 - Aberdeen

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FEM for the Acoustic Modeling of Eigenmodes: Case of the Cultural Heritage Monument of Neoria, Crete

Papadakis¹,

Stavroulakis²

2022

Int. J. Archit. Eng. Technol.

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Eigenfrequencies inside a space significantly affect its acoustic characteristics, especially below the Schroeder frequency in the low-frequency range. In Architectural Acoustics, accurate detection and visualization of eigenmodes can be particularly useful in practical applications. One of the most important landmarks in Chania, Greece, is Neoria, a cluster of 16th-century Venetian shipyards. One existing Neoria will be converted and used as a multipurpose hall. For this objective, acoustic modeling and various measurements were performed in the space. One of the purposes of the measures and modeling was the investigation of the eigenfrequencies and the eigenmodes of the area. Finite Element Method (FEM) was used for the acoustic modeling, while the acoustic measurements were performed in various positions according to ISO 3382-1. Impulse responses were measured, and frequency responses of the space were extracted using Fourier analysis. The measurements and the acoustic modeling results show that the frequencies with the most significant effect on the area are 86.1 Hz, 150.7 Hz, and 204.6 Hz. Eigenmodes of the frequencies are visualized with the application of FEM and especially the positions of nodes and antinodes, which can be utilized appropriately for the optimum placement of absorbers and diffusers in the space.

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Efficient modeling of range-dependent ray convergence effects in propagation and reverberation

Cited by 3 publications

References 7 publications

Population‐level consequences of seismic surveys on fishes: An interdisciplinary challenge

Population‐level consequences of seismic surveys on fishes: An interdisciplinary challenge

Comparison of measured and modelled reverberation and echo level in littoral waters

FEM for the Acoustic Modeling of Eigenmodes: Case of the Cultural Heritage Monument of Neoria, Crete

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