5ms Half-Hamming (in-situ, non-standard)

This option is similar to the windowing of the active response as described in the Window active response section, and can be used for in-situ measurements where a reference impulse response is measured separately. This can typically be done in concert hall measurements where a close range measurement across an empty stage or to a front seat row can provide a better reference than the actual measurement positions.

Source distance options shown and explained below.

Compute from measurement (using initial time delay)

For this option the distance is detected and computed separately from the various reference responses, in the same way as described in the Window active response section. The temperature can be changed in the dialog as well, and will influence the speed of sound and thereby the distance. It should be noted that the distance to the acoustic centre of the source will be somewhat longer than the distance detected to the nearest loudspeaker face, which might influence close measurements. It is required that the initial time delay is correct, and the measurements must have been made with a feedback loop.

Specify in meters (meas. initial time delay is not used)

This option should be chosen when the reference measurement distance is known, and the same for all reference responses in the set.