Experiments with Sounds in Repelling Mammals

S i n c e i t s introduction for use in r e p e l l i n g b i r d s , a number of people have found that Av-Alarm is effective for control of certain mammals. T h i s includes not only those f a m i l i a r to North Americans (deer, e l k , coyotes), but a l s o various less f a m i l i a r species, even anthropoids (baboons) and bats. A number of example cases are described. A concept theory is presented in order to explain why certain sounds are more effective than others, and why sounds o r i g i n a l l y meant for b i r d control are a l s o effective w i t h mammals. The theory helps to predict untested s i t u a t i o n s , and a l s o suggests when complex r e p e l l i n g sounds can profitably be augmented by other sounds or by v i s u a l harassment.