A sound-activated wake-up device generates a wake-up signal for ending a sleep-mode in response to the sound of friction between an operating platform and an input device, or the sound of touching of the input device by the user. The wake-up device includes a sound detecting unit and a signal amplifying/comparing...http://www.google.fr/patents/US6756700?utm_source=gb-gplus-shareBrevet US6756700 - Sound-activated wake-up device for electronic input devices having a sleep-mode
Sound-activated wake-up device for electronic input devices having a sleep-mode
