Scale adaptive filtering
Security system signal processor
Seismic defense system
Seismic event classification system
Seismic intruder detection using pressure waves
Seismic parameter measurement method and apparatus
Seismic-acoustic detection device
Seismic-acoustic low-flying aircraft detector
Seismo-acoustic detection, identification, and tracking of steal
Selective proximity detector
Side looking sonar apparatus
Signal detector and method for detecting signals having selected
Signal detector and methodology for monitoring sound signals hav
Signal processing circuit
Signal processing system for sensing a periodic signal in noise
Signal processor
Sonar receiver with improved time varied gain correction
Sonic wave synchronizer
Sound surge detector for alerting headphone users
Survival seismic detection system having improved tunable filter