STEVE INSKEEP, HOST: Good morning, I'm Steve Inskeep. In the movie "Airplane II," doors open automatically with a woosh (ph), and the password is for a person to make that wooshing sound.</s>STEVE INSKEEP, HOST: German scientists now want you to open doors with a sound, and you don't have to even make it. An ultrasound signal would bounce off your head. It would note the special way that your skull vibrates in response.</s>LOURDES GARCIA-NAVARRO, HOST: What if you have a head cold?</s>STEVE INSKEEP, HOST: Well, then you go back to saying woosh-woosh. You're listening to MORNING EDITION.
German scientists are researching how an ultrasound technique would bounce off a person's head — noting the special way a skull vibrates in response. It would be as unique as a fingerprint.