Physics and Astronomy
Criteria necessary to accurately estimate a set of unknown geoacoustic parameters from remote acoustic measurements are developed in order to aid the design of geoacoustic experiments. The approach is to have estimation error fall within a specified design threshold by adjusting controllable quantities such as experimental sample size or signal-to-noise ratio (SNR). This is done by computing conditions on sample size and SNR necessary for any estimate to have a variance that (1) asymptotically attains the Cramer–Rao lower bound (CRLB) and (2) has a CRLB that falls within the specified design error threshold. Applications to narrow band deterministic signals received with additive noise by vertical and horizontal arrays in typical continental shelf waveguides are explored. For typical low-frequency scenarios, necessary SNRs and samples sizes can often approach prohibitively large values when a few or more important geoacoustic parameters are unknown, making it difficult to attain practical design thresholds for allowable estimation error.
The Journal of the Acoustical Society of America
Acoustical Society of America
Required Publisher’s Statement
This article was published by The Acoustical Society of America and is available on their website.
Scholarly Commons Citation
Zanolin, M., Ingram, I., Thode, A., & Makris, N. C. (2004). Asymptotic Accuracy of Geoacoustic Inversions. The Journal of the Acoustical Society of America, 116(4). https://doi.org/10.1121/1.1787526