Mid-frequency sound intensity fluctuations on the Washington shelf
| العنوان: | Mid-frequency sound intensity fluctuations on the Washington shelf |
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| المؤلفون: | Dajun Tang, Brian T. Hefner, Guangyu Xu, Eric I. Thorsos, Ramsey R. Harcourt, John B. Mickett, Kumar Prakash |
| المصدر: | The Journal of the Acoustical Society of America. 153:A375-A375 |
| بيانات النشر: | Acoustical Society of America (ASA), 2023. |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Acoustics and Ultrasonics, Arts and Humanities (miscellaneous) |
| الوصف: | A joint Oceanography/Acoustics experiment was conducted 15 July–13 August, 2022 in Washington’s shallow coastal shelf waters to investigate mid-frequency sound intensity fluctuations and the oceanographic mechanisms driving them, including subsurface ducts, internal tides, and internal waves. Acoustic pulses centered at 3.5 kHz and 6 kHz were transmitted up-shelf from a stationary source and recorded by receivers on two moorings at 10 km and 20 km ranges, respectively. A ship-towed Shallow Water Integrated Mapping System (SWIMS) repeatedly sampled the ocean between the source and receiver moorings, providing sound speed measurements as a function of range, depth, and time. In addition, five oceanographic moorings strategically placed around the acoustic path took additional ocean data over time. The sound speed profiles feature a surface mixed layer underneath which a subsurface duct with local sound speed minima of 1–2 m/s is frequently present. Analysis shows that (1) when the sound source is inside the subsurface duct, transmission loss is reduced by 15 dB compared to when the source is outside and (2) the statistics of the acoustic intensity are consistent with strong scattering. [Work supported by the Office of Naval Research.] |
| تدمد: | 1520-8524 0001-4966 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::2764c4c783e6759d0752a64a97f2ba73 https://doi.org/10.1121/10.0019229 |
| رقم الأكسشن: | edsair.doi...........2764c4c783e6759d0752a64a97f2ba73 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Scitation. | تدمد: | 15208524 00014966 |
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