title: Applications of airborne ultrasound in human-computer interaction.
abstract: Airborne ultrasound is a rapidly developing subfield within human-computer interaction (HCI). Touchless ultrasonic interfaces and pen tracking systems are part of recent trends in HCI and are gaining industry momentum. This paper aims to provide the background and overview necessary to understand the capabilities of ultrasound and its potential future in human-computer interaction. The latest developments on the ultrasound transducer side are presented, focusing on capacitive micro-machined ultrasonic transducers, or CMUTs. Their introduction is an important step toward providing real, low-cost multi-sensor array and beam-forming options. We also provide a unified mathematical framework for understanding and analyzing algorithms used for ultrasound detection and tracking for some of the most relevant applications.
authors: Elliptic Laboratories, Sandakerveien 24c, N-0473 Oslo, Norway. Electronic address: tobias@kaja.no.
authors: Tobias
authors: T
authors: Dahl
authors: School of Mechanical Engineering, University of Valle, Ciudad Universitaria Meléndez, Cali, Colombia.
authors: Joao L
authors: JL
authors: Ealo
authors: Elliptic Laboratories, Sandakerveien 24c, N-0473 Oslo, Norway.
authors: Hans J
authors: HJ
authors: Bang
authors: Department of Informatics, University of Oslo, Gaustadaléen 23 B, N-0373 Oslo, Norway.
authors: Sverre
authors: S
authors: Holm
authors: Stanford University, E. L. Ginzton Laboratory, 348 Via Pueblo Mall, United States.
authors: Pierre
authors: P
authors: Khuri-Yakub
mesh_terms: D000162:Acoustics / Q000295:instrumentation; D000388:Air; D000465:Algorithms; D004582:Electronics, Medical / Q000295:instrumentation; D004867:Equipment Design; D006801:Humans; D055095:Optics and Photonics / Q000295:instrumentation; D058998:Remote Sensing Technology / Q000295:instrumentation; D014159:Transducers; D014463:Ultrasonography / Q000295:instrumentation*; D014584:User-Computer Interface
keywords: 3D sensing; CMUT; IR; Tracking; Ultrasound