in turkey calls we huff up the air with the stomach muscles and our diaphram. the howl ? get a good deep breath and blow,,,higher pitch , add tongue pressure to the call,,lower pitch , back off on the tongue pressure. to bark ,,, i make a quick huff and open and close my mouth quickly. the bark howl,,,quick huff followed by a loonnggg high pitched howl. that's the best i can describe how i do it.
myself, i can not control the dome howler ,,,,but the double howler is my favorite dog call ,,,,,,it'll mimmick all the dogs of all ages.
remember the '' non threatening or non aggressive barks and howls'' are best as they don't impose a threat to any coyote of any age that may be within earshot of your calls. later