Not open, augment. He couldn't augment the wood so he tried to sonic the non-wood (steel?) lock, and then Donna kicked it open. Sonic doesn't work on living things (it analyzes them but it can't kill or, afaik, heal or anything like that), wood has cells.
ailaG, you are very technical, maybe a future companion???
LOL I like to overanalyze. Which is a problem when the current showrunner explicitly said there isn't much scientific logic to the show, and you try to find the scientific logic in the show.But at least it entertains me :)