Introduction Skinput allows the user to simply tap their skin in order to control audio devices, play games, make phone calls. It uses the sensors to determine where the user taps on their skin.
What is Skinput Skinput turns the body into a touch screen surface. Skinput is an “input technology” mainly used to control mobile devices. Skinput is named because it uses the human skin as an input devices or tracking surface.
Principle of Skinput It listens to vibrations in your body. Skinput also responds to the various hand gestures. The arm is an instrument.
Technology Used Skinput, the system is a combination of two technologies: the ability to detect the ultra low frequency sound and the ‘pico’ projectors. Pico projector applies the use of projector in a hand held device. An acoustic detector detects the ultra low frequency.
Pico Projector It is also known as pocket projector or mobile projector. The system comprises three main parts: The Laser light source The Combiner optics The Scanning mirror
Bio-Acoustics Study of sound waves inside living body. When a finger taps the skin, several distinct forms of acoustic energy are produced. Longitudinal Waves Transverse Waves
Longitudinal Waves:These waves travel through the rigidtissues of the arm, exciting the waves,which can respond to the mechanicalvibrations by tapping on a rigid body. TransverseWaves:Tapping on soft regions of the armcreates higher amplitude transversewaves.
Bio-Acoustics: Sensing These signals need to be sensed and worked upon. This is done by wearing the wave sensor arm band.
Advantages No need to interact with the gadget directly. Don’t have to worry about keypad. People with larger fingers get trouble in navigating tiny buttons and keypads on mobile phones. With skinput this problem disappears.
Applications Mobile Gaming I-pods An aid to paralyzed persons.
Future Implications With small sized Pico-projectors, Skinput oriented systems, are an emerging trend. Research is carried out for smaller wrist watch sized sensor arm band.
Conclusion This approach is to appropriate the human body as an input interface. It described a wearable bio-acoustic array used to detect and localize finger tap on the hand and the forearm. This system performs well even when the body is in motion.