Sealed and vented enclosures after Thiele and Small: frequency response, lower cut-off frequency, port length and port air velocity – plus the evaluation of an impedance measurement to verify the tuning.
Inputs
Result
Handover to the part generator: open the saved file there with “Load port data set” (format speakerlib.reflexrohr, version 1).
Verification: evaluate an impedance measurement
No measurement data yet.
In a vented box the tuning frequency lies at the dip between the two impedance peaks. If it differs from the target: a shorter port raises Fb, a longer port lowers it.