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Estimating temperature and current using a pair of transceivers in a harbor environment
Chen-Fen Huang1, Naokazu Taniguchi1, Yen-Hsiang Chen2
1Institute of Oceanography, National Taiwan University, Taipei 10617, Taiwan chenfen@ntu.edu.tw, naokazutaniguchi@gmail.com.
The Journal of the Acoustical Society of America
|August 1, 2016
Summary
This study shows acoustic signals can measure underwater temperature and currents in harbors. Multipath acoustic propagation effectively estimates spatial variations, similar to direct measurements.
Area of Science:
- Oceanography
- Acoustics
- Environmental Monitoring
Background:
- Measuring horizontal temperature and current variations typically requires multiple acoustic transceivers.
- Harbor environments present challenges due to reverberation, complicating acoustic measurements.
Purpose of the Study:
- To investigate the feasibility of using a simple pair of transceivers in a reverberant harbor.
- To extract spatial water information (temperature and current) using multipath acoustic propagation.
Main Methods:
- Deployed a pair of transceivers in a highly-reverberant harbor.
- Analyzed pulse responses, focusing on direct and harbor-side reflected acoustic arrivals.
- Compared path-averaged acoustic measurements with direct point measurements.
Main Results:
- Observed distinct direct and reflected acoustic arrival groups during flood tide.
- Path-averaged acoustic measurements exhibited similar temporal trends to direct measurements.
- Demonstrated the potential for estimating spatial variations in temperature and current.
Conclusions:
- A pair of transceivers can extract spatial oceanographic data in reverberant environments.
- Multipath acoustic propagation is a viable method for inferring temperature and current fields.
- This technique offers a simpler alternative to traditional multi-transceiver setups.
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