I wouldn't use one. My grandma had one for her dog, and when I was at her house I wanted to see how it worked (stupid) so we put it very close to my ear and it gave me the worst stinging feeling in my head (it felt like a bee stung the inside of my ear). People thought I was crazy but my brothers girlfriend did the same thing, and she said the same thing I did, it stung (and gave us severe headaches)!
I would not recommend using it, especially near your chins, just in case.
There are other ways to deal with your neighbor dog barking, that would be safer for both you and your chins (and the dog).