Attenuation of low-frequency underwater sound using an array of air-filled balloons and comparison to effective medium theory
| Autor: | Kevin M. Lee, Mark S. Wochner, Preston S. Wilson |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Void (astronomy)
Materials science Acoustics and Ultrasonics Acoustics Attenuation Design tool Low frequency 01 natural sciences 03 medical and health sciences 0302 clinical medicine Arts and Humanities (miscellaneous) Dispersion relation 0103 physical sciences Noise control Underwater 030223 otorhinolaryngology 010301 acoustics Acoustic attenuation |
| Zdroj: | The Journal of the Acoustical Society of America. 142(6) |
| ISSN: | 1520-8524 |
| Popis: | The ultimate goal of this work is to accurately predict the attenuation through a collection of large (on the order of 10-cm-radius) tethered encapsulated bubbles used in underwater noise abatement systems. Measurements of underwater sound attenuation were performed during a set of lake experiments, where a low-frequency compact electromechanical sound source was surrounded by different arrays of encapsulated bubbles with various individual bubbles sizes and void fractions. The measurements were compared with an existing predictive model [Church, J. Acoust. Soc. Am. 97, 1510-1521 (1995)] of the dispersion relation for linear propagation in liquid containing encapsulated bubbles. Although the model was originally intended to describe ultrasound contrast agents, it is evaluated here for large bubbles, and hence low frequencies, as a design tool for future underwater noise abatement systems, and there is good quantitative agreement between the observations and the model. |
| Databáze: | OpenAIRE |
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