METHOD AND DEVICE FOR THE LOCATING AT LEAST ONE TOUCH ON A TOUCH-SENSITIVE SURFACE OF AN OBJECT

摘要

The invention relates to a method for locating at least one touch on a touch-sensitive surface of an object, comprising the following steps: monitoring for (100) at least one touch by propagating (102), on the touch-sensitive surface of the object, elastic mechanical waves from at least one emission point of the object, and by detecting (104) said elastic mechanical waves in at least one reception point of the object, in order to obtain at least one sensed signal; and locating (200) at least one touch on the touch-sensitive surface of the object by comparing certain spectral characteristics of the sensed signal to a set of reference characteristics. The monitoring step (100) comprises measuring (104, 106) the sensed signal during a starting time interval (t3) during a transition phase of the propagation of the emitted waves, for supplying, to said at least one reception point, information on radiation interfered with by said at least one touch.