Location of Impulsive Acoustic Sources in Urban Environments Using Finite-Difference, Time-Domain Modeling of Time Reversal with Data from Small Sensor Arrays
Abstract
The author studied the use of time reversal processing with small sensor arrays, less than ten meters across, to locate impulsive sound sources in an urban environment. Sound propagation from the source was modeled in two dimensions using a finite-difference, time-domain (FDTD) method. The model produced simulated pressure-versus-time traces at sensor locations for various sensor arrays. These pressure traces were then reversed in time and fed back into the FDTD model to produce a simulated time-reversed wave. In this manner, a number of sensor arrays were modeled in various hypothetical urban environments to identify the limitations of using time reversal to locate an impulsive source with the smallest arrays possible. Generally, arrays of eight or more sensors with a total spatial extent of eight to ten meters were sufficient for locating non-line-of-sight sources, whereas smaller arrays proved inadequate.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 2006
- Accession Number
- ADA590016
Entities
People
- Mark E. Todaro
Organizations
- United States Army Armament Research, Development and Engineering Center