Abstract: An electronic device is provided for use in an impact sport head protector. The device includes a tilt sensor that generates at least one output signal representing tilt orientation of the head protector. A processor is configured to sample and process the tilt sensor output signal(s) over a number of successive cycles to determine whether the head protector is in an unsafe position during a given cycle and to generate an alarm signal based on such determination at least for the given cycle. An audio device is configured to produce an audible alarm in response to such alarm signal. The processor is configured to remove the effect of noise components in the tilt sensor output signal(s) in generating the alarm signal. The processor can also be configured to constrain the time delay that the head protector is in an unsafe position before raising the alarm signal.