NEC Corporation has announced the development of a technology, which allows users to operate consumer electronics with compact acceleration sensors attached to their arm. With these sensors, users can tap the arm to control the device.
NEC ARM SENSORS
Worn on each wrist, the acceleration sensors display the control panel on the arms, depending on the area of contact. Divided into seven sections, each area of the arm is designated into virtual device oriented input control used to operate the consumer device. The area is detected by the signal received by the sensor, which are different for different sections of the arm. The seven zones are divided into lower, middle and upper sections of the arms and also by clapping palms together. The input gestures are almost error-free and are easy to remember.
Upon display of the virtual control, users are required to momentarily stop their ongoing activity and choose the desired control input. The virtual technology can be used to operate music players or mobile phones while they are stored elsewhere or are not easily accessible.
Source: http://www.nec.com/