Αποτελέσματα Αναζήτησης
1 Μαρ 2023 · With ambient noise data collected in the open ocean between 100 Hz and 50 kHz from 1999 to 2022, the ambient noise level is observed to sharply decrease as wind speed increases beyond 15 m/s for frequencies higher than 4 kHz.
24 Ιουν 2021 · A large underwater noise dataset and global wind model were combined to produce an empirical model for the dependence of underwater noise on local winds. The model explicitly separates noise generated by sources related to the wind from anthropogenic sources of underwater sound.
Aleksas Narščius. The operation of dredges, while dredging the deposits from the bottom of marine and port areas is known as radiating different underwater noises.
We report in this study how ocean-bottom seismometers (OBS) can be used as passive sonars to automatically detect, localize, and track moving acoustic sources at the ocean surface.
This paper would make an intensive study on the random characteristic of ocean ambient noise, and discuss the statistical analysis method, which including the mathematical expectation, the variance, the power spectral density and so on.
Below 10 Hz, microseisms caused by the nonlinear interaction of ocean surface waves are the dominant source of ocean noise. Earthquakes also contribute intermittently. Between 10 and 200 Hz distant shipping is the largest contributor to the noise spectrum level (Wenz, 1962).
The Wenz curves describe relative levels of marine ambient noise from weather, wind, geologic activity, and commercial shipping. The audiograms are pressure spectral levels with units of dB re 1 µPa, whereas the Wenz noise curves are those of pressure spectral density having units of dB re 1 µPa 2 /Hz.
