Accelerometer Low Pass Filtering

by 
accelX = (acceleration.x * kFilteringFactor) + (accelX * (1.0 - kFilteringFactor));

Whats happening in this code you are multiplying the acceleration at the moment by the Filtering factor 0.1 and then adding it to the filtered acceleration of the last time an update was called by 0.9.

This is pretty much getting the new value and adding it as 10% of the total accelX the other 90% is made up of the previous value which depends on the value before that, which depends on the value before that and so on. This cuts out high frequency values as only allows 10% of any change to go through to the new accelX value.

The KFilteringFactor of 0.1 makes this filter cut out all high frequencies. You will definitely want to experiment by changing this value to suit your particular application.

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