RANDY ANDERSON SIGNATURE SERIES MOUTH CALLS The Randy Anderson Signature Series Calls make the full range of coyote howls and distress calls. The Sonic Dome predator mouth call is used to create higher pitch howls. It has a natural skip that perfectly reproduces the interrogation howl that Randy uses to lure in wise old coyotes. The Double Howler predator mouth call has a deeper pitch, which is perfect for making the coyotes lonesome greeting howl. Two-Latex Reeds.