Comparing a linear with a non-linear method for acoustic localization
Keywords:Acoustic waves, Correlation methods, Error analysis, Nonlinear systems, Problem solving, Signal theory, Acoustic localization, Error bounds, Non-linear methods, Path geometry
AbstractThe performance of two different acoustic localization techniques is evaluated with signals from right whales in the Bay of Fundy. The methods are compared to the GPS localization error (114-273 m, N=3) through the use of played back whale calls. The linear approach underestimates the source location error (22 m, N=3), whereas the non-linear approach exaggerates the error (462-1166 m, N=3). The linear approach may render unrealistic error bounds because of the inherent non-linear properties of the localization problem. The non-linear approach may exaggerate error bounds by choosing the wrong cross-correlation peak for the time-of-arrival difference measurements. Whereas the GPS localization error was always contained within the non-linear error bounds it was never contained within the linear error localization bounds. This indicates that the non-linear approach can give more realistic error estimates, especially in situations where the sound path geometry is unknown. [Work supported by the Office of Naval Research and the Oticon Foundation].
How to Cite
Copyright on articles is held by the author(s). The corresponding author has the right to grant on behalf of all authors and does grant on behalf of all authors, a worldwide exclusive licence (or non-exclusive license for government employees) to the Publishers and its licensees in perpetuity, in all forms, formats and media (whether known now or created in the future)
i) to publish, reproduce, distribute, display and store the Contribution;
ii) to translate the Contribution into other languages, create adaptations, reprints, include within collections and create summaries, extracts and/or, abstracts of the Contribution;
iii) to exploit all subsidiary rights in the Contribution,
iv) to provide the inclusion of electronic links from the Contribution to third party material where-ever it may be located;
v) to licence any third party to do any or all of the above.