Broadband sound propagation in a seagrass meadow throughout a diurnal cycle.
J Acoust Soc Am
; 146(4): EL335, 2019 10.
Article
em En
| MEDLINE
| ID: mdl-31671955
ABSTRACT
Acoustic propagation measurements were conducted in a Thalassia testudinum meadow in the Lower Laguna Madre, a shallow bay on the Texas Gulf of Mexico coast. A piezoelectric source transmitted frequency-modulated chirps (0.1 to 100 kHz) over a 24-h period during which oceanographic probes measured environmental parameters including dissolved oxygen and solar irradiance. Compared to a nearby less vegetated area, the received level was lower by as much as 30 dB during the early morning hours. At the peak of photosynthesis-driven bubble production in the late afternoon, an additional decrease in level of 11 dB was observed.
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MEDLINE
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En
Ano de publicação:
2019
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Article