Document Type
Conference Proceeding
Publication Title
Proceedings of SPIE - the International Society for Optical Engineering
Abstract
A method of infrasonic signal classification using hermite polynomials for signal preprocessing is presented. Infrasound is a low frequency acoustic phenomenon typically in the frequency range 0.01 Hz to 10 Hz. Data collected from infrasound sensors are preprocessed using a hermite orthogonal basis inner product approach. The hermite preprocessed signals result in feature vectors that are used as input to a parallel bank of radial basis function neural networks (RBFNN) for classification. The spread and threshold values for each of the RBFNN are then optimized. Robustness of this classification method is tested by introducing unknown events outside the training set and counting errors. The hermite preprocessing method is shown to have superior performance compared to a standard cepstral preprocessing method.
DOI
10.1117/12.661513
Publication Date
4-17-2006
Recommended Citation
Lowrie, C. G., & Ham, F. M. (2006). Classification of infrasound events using hermite polynomial preprocessing and radial basis function neural networks. Paper presented at the Proceedings of SPIE - the International Society for Optical Engineering, 6247 doi:10.1117/12.661513