A method of communicating with an electronic device, comprising: providing a computer having an audible sound receiving and generating sub-system including a microphone; transmitting from a source at least one ultrasonic acoustic signal, encoded with information to the computer; and receiving said at least one signal by said microphone, to be detected by said computer. Preferably, the ultrasonic frequency used is below 50 kHz.

 
Web www.patentalert.com

< Device for determining and/or monitoring the volume flow rate and/or mass flow rate of a medium to be measured

> Anatomic triangulation

~ 00437