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Estimation of Void Fraction in the Seagrass (Zostera Marina) Bed Using Sound Speed Dispersion  

La, Hyoung-Sul (한양대학교 해양환경과학과 해양음향연구실)
Na, Jung-Yul (한양대학교 해양환경과학과 해양음향연구실)
Lee, Sung-Mi (한양대학교 해양환경과학과 해양음향연구실)
Publication Information
The Journal of the Acoustical Society of Korea / v.27, no.1, 2008 , pp. 33-39 More about this Journal
Abstract
Void fraction of air bubble in the seagrass bed by photosynthesis was estimated with sound speed dispersion. A field experiment was conducted at Seagrasss bed of which bottom type is sandy mud and 120 kHz CW waveform was transmitted to obtain backscattered signals from seagrass bed. The differences of the arrival time of received signal from seagrass bed were observed between day and night. The diurnal variation of arrival time was caused by sound speed dispersion of air bubble generated by photosynthesis of seagrass.
Keywords
Seagrass; Air bubble; Sound speed dispersion; Void fraction; Photosynthesis;
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