I have squirrels getting into our attic. They are entering in a venting hole that is very high on the eave of the house. I cannot get to the spot in the attic nor can I reach the spot where they are entering from the ground, however, I can see the place where they are entering from the ground. I think I need something that will produce some sound that will chase them out. Can you recommend the best way to get rid of them. Please help.