| Full text | |
| Author(s): |
Total Authors: 3
|
| Affiliation: | [1] FGV EAESP, Technol & Data Sci Dept, Sao Paulo - Brazil
[2] EP USP, Acoust & Environm Lab, Sao Paulo - Brazil
[3] EP USP, Sao Paulo - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Journal of the Brazilian Society of Mechanical Sciences and Engineering; v. 43, n. 12 DEC 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
The study of the acoustic emission of underwater gas bubbles is a subject of both theoretical and applied interest, since it finds an important application in the development of acoustic monitoring tools for detection and quantification of underwater gas leakages. An underlying physical model is essential in the study of such emissions, but is not enough: also some statistical procedure must be applied in order to deal with all uncertainties (including those caused by background noise). In this paper, we take a probabilistic (Bayesian) methodology which is well known in the statistical signal analysis communitiy, and apply it to the problem of estimating the radii of air bubbles in water. We introduce the bubblegram, a feature extraction technique graphically similar to the traditional spectrogram but tailored to respond only to pulse structures that correspond to a given physical model. We investigate the performance of the bubblegram and our model in general using laboratory generated data. (AU) | |
| FAPESP's process: | 14/50279-4 - Brasil Research Centre for Gas Innovation |
| Grantee: | Julio Romano Meneghini |
| Support Opportunities: | Research Grants - Research Centers in Engineering Program |
| FAPESP's process: | 16/02175-0 - Underwater Soundscapes in the São Paulo State Coast |
| Grantee: | Linilson Rodrigues Padovese |
| Support Opportunities: | Regular Research Grants |