Characterization of the Seismic Medium Using Nonlinear Identification Techniques
Abstract
The near field seismic propagation medium was characterized using Wiener's nonlinear identification techniques. The system stimulus was a white noise signal generated by an audio system and measured by a microphone placed directly in front of the speaker. The output signal was measured by a geophone placed at predetermined intervals down range from the speaker. The first and second order Wiener kernels of the system were determined, and it was conclusively shown that the system exhibits nonlinearities. The calculated kernels were then used to predict an output for a given input. Comparison of the predicted output with that of the measured output indicates that the physical system can be more accurately characterized by the first and second order Wiener kernels than by use of linear models.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1976
- Accession Number
- ADB016324
Entities
People
- James G. Constantine
- Michael E. Warren
- Raymond B. Walker