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FPM-β: A method for waveguide invariant estimation using one-dimensional broadband acoustic intensity.
Wei Gao1, Shoudong Wang1, Xiaolei Li1
1College of Marine Technology, Ocean University of China, Qingdao 266100, China gaowei@ouc.edu.cn, wsd@stu.ouc.edu.cn, lxl@ouc.edu.cn.
JASA Express Letters
|September 26, 2022
Summary
A new method estimates ocean waveguide invariants using acoustic intensity spectra. This approach, combining a β-warping transform and singular value decomposition, requires only single hydrophone data and no prior environmental information.
Area of Science:
- Ocean acoustics
- Waveguide theory
- Signal processing
Background:
- Ocean waveguides support a finite number of long-range propagating normal modes.
- Accurate estimation of waveguide invariants is crucial for underwater acoustic applications.
- Existing methods often require extensive environmental data or complex sensor arrays.
Purpose of the Study:
- To propose a novel method for estimating waveguide invariants in ocean environments.
- To develop a technique that utilizes readily available acoustic intensity data.
- To overcome limitations of existing methods by not requiring prior environmental parameters.
Main Methods:
- Acoustic intensity spectrum analysis from a single hydrophone.
- Application of the β-warping transform operator.
- Integration with singular value decomposition (SVD).
Main Results:
- Successfully estimated waveguide invariants using simulated and experimental data.
- Demonstrated the effectiveness of the combined β-warping transform and SVD approach.
- Validated the method's independence from prior marine environmental parameters.
Conclusions:
- The proposed method offers a robust and practical solution for waveguide invariant estimation.
- This technique simplifies underwater acoustic data processing by using single-point measurements.
- The findings have implications for acoustic propagation modeling and underwater navigation.
