We have a fairly active pack here in my neighborhood, and I can hear them howling and yipping most nights when I take the dog out for his late-night business.
About a week ago they were rather close to the house, and with all the windows open their howling was rather loud. I had to chuckle at the reaction of my Blue and Gold Macaw - she went from chatting and cooing loudly, to dead silent! The expression on her face was something like this:

!
My miniature dachshund, however, didn't seem the slightest bit perturbed. Probably because he hears them so often while we're walking. Either that or he's lost even more hearing than I thought!
Knowing that they're out there, we use caution when outside in the evening, especially if we're walking the dog. We've never felt threatened by them, primarily because the forest around us is abundantly capable of providing sustainance for the pack. Besides, they're a lot less scary than the fisher that lives in the neighborhood!