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Ref.: Journal of Acoustical Society of America, Vol.147(6),
pp.4009-4019, June 2020 (doi).
Abstract:
This paper describes the lessons learned from the experiment BIOCOM'19 carried
out in January 2019, in a shallow water bay off the island of Cabo Frio (RJ, Brazil).
A dual accelerometer vector sensor hydrophone was deployed for two days, near a
rocky shore covered with a significant benthic fauna. The results show that the
frequency band above approximately 1.5 kHz is mostly associated with invertebrate
biological noise and that the acoustic and the particle motion fields have a similar
behavior, following the usual dawn-dusk activity pattern, and a coherent directivity
content. At low frequencies, below ~300 Hz, the acoustic pressure and the particle
acceleration fields have significantly different spectral content along time. Many of
these differences are due to anthropogenic noise sources related with nearby boating
activity, while during quiet periods they may be attributed to the biological activity
from the rock shore.