An interactive device for interactively operating music and speech with moving frequencies of exercisers comprises a sensor for sensing the moving frequency of the exerciser, and converting the frequency as signals for outputting; and the sensor is installed to a moving range of the exerciser which has...http://www.google.com/patents/US20030139254?utm_source=gb-gplus-sharePatent US20030139254 - Interactive device for interactively operating music and speech with moving frequencies of exercisers
Interactive device for interactively operating music and speech with moving ...
