Flying bikes, cell phone robots, smart walking sticks and audio speakers that defy logic are inventions all on display Tuesday at Microsoft's Redmond, Wash., headquarters.

On the second day of the Microsoft Research Faculty Summit, Microsoft researchers and their academic partners showed off some of their projects. They ranged from the wacky to the relatively staid.

The Flying Bike is a project that would let users ride a stationary bike that is integrated into a video game. In the demonstration, the game was Flight Simulator X and players have to pedal fast enough to stay airborne in the game. But Yolanda Rankin, a computer science researcher at Northwestern University and one of the developers of the project, envisions lots of other games that users could play using the bike, such as racing games and shooter games where players must flee or chase opponents.

InkSeine is an application that tightly integrates search with pen computing. Users can write a word on the screen with a special pen. Holding down a button on the pen and drawing a circle around the word pops up a menu that allows users to search for the term online or on the hard drive.

InkSeine has other unique user interface features: Making a circular motion with the pen on the screen will scroll a Web page down. It’s an easier movement than trying to touch the small box in the narrow column on the right side of the screen with the pen and then pull it down.

One of the more amazing inventions on display is Personal Audio Space. In the demo, 16 small speakers in a vertical line simultaneously play two songs: a rock song and a piece of classical music. Up close, they let off a cacophony of sound. But standing on one X marked on the floor around five feet from the speakers, a listener only hears the rock song. Standing on another X about two feet away next to the first, a listener hears only the classical music.

The technology could be used in a variety of applications, said Ivan Tashev, one of the Microsoft researchers working on the project. In a shared office, two workers could listen to music or their phones without bothering the other. Two people could sit on their front porch at home, each listening to their own favorite music. A baby sitter could watch TV with a baby asleep in the next room, because the speakers could be used simply to direct sound to one place.

The IDG News Service is a Network World affiliate.