Noise Desensitization Tips

Hello everyone!

Thank you for this wonderful forum. I am starting my 3 yr old dog on some noise desensitization techniques using recorded audio that I place around the house (a la some of the advice from the Kikopup videos and others).

For folks who have succeeded in reducing / eliminating reactivity to sound, I have some questions as I am ramping up that were not quite answered in some of the videos — any / all advice would be hugely appreciated.

1. How do you manage a noise desensitization scheme when the noises are random — e.g., the dog isn't responding to a door bell, but to a wide range of noises that the dog will hear outside a house or apartment. Do you just collect as many of those noises as possible, or is there a twist on the desensitization scheme that you implement?
2. Where do you place the audio? Do you place it near the dog, or near where the provocation would usually occur? (e.g., closer to an outside wall or door)?
3. What non-adversive steps do you take if the dog does start to bark?

Any tips from those that have gotten to the other side and seen it work would be fantastic — even if just by way of encouragement to someone just getting started.

Thanks!