"Nothing says fun like a speech demo." Those are the words of Microsoft's CTSO Eric Rudder, not ours -- although we do have to agree. As you'll see for yourself in the video after the break, Microsoft held a private event for its employees a few weeks ago showcasing some of the advancements it's achieved with Bing's voice search for Windows Phone. Thanks to the work of MS' Research arm and the folks at Advanced Technology Group, voice recognition accuracy on a prototype build has now been improved by up to 15-percent on the back end and should even see a further 10- to 15-percent performance boost. In addition to this decreased error rate, the team's also greatly enhanced the speed at which the app delivers relevant results. So when can you expect this new and improved Bing app for WP? That part's unclear, but it appears Microsoft's already implementing changes on the back end to bolster current use.