new experimental to operate on frequencies 137.75, 138.0, 138.25, 1152.25, 152.50 MHz for research of acoustic signal processing to locate undesired gunshots new experimental to operate on frequencies 137.75, 138.0, 138.25, 1152.25, 152.50 MHz for research of acoustic signal processing to locate undesired gunshots SYB 2-26-98