Automatic truncation of impulse response

If  is checked, the impulse response can be automatically truncated based on an automatic detection of the noise floor as shown below.

With the Noise floor margin setting the user can specify in dB how far above the noise level at the estimated crosspoint the truncation point is chosen and integration shall start.

Typical values are 5-10 dB, the recommended value is 5 dB. Higher margins should be used only with responses with extraordinary high signal-to-noise ratios.

The ISO 3382 standard recommends a certain safety margin to the noise floor. It should be noted that this safety margin is provided if the noise floor margin is used.