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美国政府科技报告
>Investigation of the Acoustics of Marine Sediments Using an Impedance Tube and Continued Investigation of the Acoustics of Marine Sediments Using Impedance Tube and Acoustic Resonator Techniques
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Investigation of the Acoustics of Marine Sediments Using an Impedance Tube and Continued Investigation of the Acoustics of Marine Sediments Using Impedance Tube and Acoustic Resonator Techniques
The primary purpose of this work was to conduct laboratory and field studies of the acoustics of sandy ocean bottom sediments, with sufficient control of experimental uncertainly to make meaningful comparisons to existing and developing models. The work began with a focus on low frequencies, below the Biot transition frequency, but expanded in frequency range to cover frequencies above the Biot transition frequency. Initially, the work was focused on sandy sediments, but additional multiphase ocean-bottom materials were eventually studied, too, including gas-bearing sediments and seagrass. The work was initially focused on laboratory measurements, but expanded to include work during the large-scale, ONR-sponsored at-sea experiment Shallow Water '06. Results of a large number of associated laboratory and field measurements are presented along with model comparisons, for the various ocean bottom materials mentioned above.
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