puppies and adopted rescue dogs are like babies. Those who have one or some, or have had know exactly what that is. I have had kids, gkids and now a house of dogs. Yes, it is very stressful and takes time. Others have suggested to find out if she is deaf. Yes or no will depend on exactly what course of action to take.
Re-directing and positive reinforcement is the best method. Personally I am against using the spray bottles as punishment. If you do, then you won't be able to use when it is hot to help cool off your dog? Just my opinion.
Dogs bark for attention or insecurity. Both require a response but each are different. If the bark is for attention, re-direct and correct. Ignoring wont work since they can bark much longer than we can be patient. Correcting the unwanted behavior is about immediate, precise and consistent responses. Such as a quick verbal sound (watch Cesar Milan) and a touch to break the focus on what the dog wants to do. How many times do you have to correct? As many times as it takes and THAT will be the number of times needed. PRAISE for positive reward. Only if earned.