System and method for detecting tremors

Abstract

A hand-held personal care device has an actuator for implementing a personal care function which generates a vibration. A sensor signal is obtained which depends on motion in particular vibration of the personal care device. Tremor vibrations are detected from the sensor signal in order to detect tremor. By detecting the tremor vibrations based on the way they modulate (e.g., dampen or otherwise influence) existing driven vibrations of the personal care function, it has been found that a simple low cost sensor may be used. In particular, the sensor may comprise an actuator current sensor or a simple single axis vibration (i.e., motion) sensor.

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