Try pairing the noises with a toy or a food treat. I do this with my girl out on walks if we hear a loud bang and now she always turns to me immediately for her toy to be thrown.
It makes it a signal of fun rather than a bad thing. However i appreciate it's hard when the dog is perhaps too stressed to eat/play. My girl was nervous but able to respond.
Try this site for more info re vibrations etc:
http://www.dog-secrets.co.uk/behaviour-training/dogs-and-fireworks.html scroll towards the end and it is under Other parts of the composite Stimulus.
Also as Teri suggested, do try a DAP and natural remedies, plus give a safe area to "run" to such as a covered crate, preferably if possible situated near to the DAP.
If it gets worse, the dog can start to generalise the noise phobia to all sorts of noises to the point where they are really affected and too scared to go out even when there are no bangs, so if you cannot get this to improve, do get in touch with areputable behaviourist, here:
http://www.apbc.org.uk/Good luck :)