teaching chihuahuas not to bark SOOO much

Can you teach your chihuahua not to bark at every single movement someone makes? Well, let me tell you about mine. My teen daughter who lives in this house and they see every single day is barked at by my chi's at every chance they get. When she comes home from school, when she goes somewhere and comes back in, and even my husband gets "the bark treatment" when he comes home from work. I don't know why this is. When they see me coming or even getting out of my car, they will NOT bark at me. Perhaps this is because they instinctively know where their food is coming from? I don't know. Whatever the reason, I decided to try something. Now, I love my chis and I would NEVER EVER hit them.One day they even started to nip at our family friend, who they have seen many times and this had to stop. So, a couple of days ago, I took a rolled up newspaper whenever they started to bark at the family members coming in the door, I tapped it on the table and said NO, and they instantly stopped their barking. Just tapping that rolled up paper on the coffee table did the trick for me. What also works is an empty paper towel roll. They don't like the noise of it. So, if you have BARKING CHIHUAHUAS like I do, and they tend to bark alot, you might just try this. Please do not scare them with it too much though. Just a tap or two on the coffee table does the trick. Try it and see.