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Wyle has developed acoustic threat assessment algorithms for the Survivability Planner Associate Rerouter (SPAR) program based on Rotorcraft Noise Model (RNM). Acoustic Detection of Aircraft Model (ADAM) propagation technology. The SPAR program’s acoustic objective is near real-time propagation prediction that allows team cooperative/collaborative responses to tactical threats, enhancing team survivability.
- Human Detection Metrics
- Based on signal to noise in critical bands
- Accounts for masking, tonal content
- Single or group of listeners
- Attentive or inattentive listeners
- Probability of Detection (PoD) for a given frequency based on Wyle ICHIN (I Can Hear It Now) Algorithm
- D’Prime audibility integrated metric based on the U.S. National Park Service validated methodology
- Electronic Sensor Probability of Detection
- Methodology from ARCAS (Assessment of Rotorcraft by Acoustic Sensing)
- Energy-based algorithm
- Statistical signal-to-noise (background) technique
Analysis capability includes the effect of moderate atmospheric refraction modeled as curved propagation paths through a horizontally stratifed atmosphere with linearly varying winds over terrain. In the case of strong downwind refraction multiple reflection paths are computed, and for strong upwind refraction, the effects of shadow zones are included. Audibility and detection algorithms consider the receptor situation and background spectra, which may vary in time or location.