High-frequency window (short)

The decay time for transient signals varies as function of frequency. Using this option the time window size will depend on frequency.

If  is checked, the window size of the high frequency part can be set different than the window size of the low frequency part.

Usually the decay time for low frequencies is longer than the decay time for high frequencies. To remove the influence on background noise it is therefore useful to apply a shorter window at high frequencies.

You can determine the length of this window:

You can also set the transition range where the low and high frequency windows overlap:

According to the settings above, the high frequency window of only 10 milliseconds is gradually applied (linear) from 70 Hz and fully applied from 900 Hz.

Warning: This high-frequency window must only be applied on transient signals. On a stationary signal it makes no sense and will give wrong results.