ρωτησα το support τμημα του bassbox pro αν λαμβανει υποψη το baffle defraction step στα αποτελεσματα του.Δεν λεει κατι καινουργιο απλα βρηκα την απαντηση κατατοπιστικη κ ισως ενδιαφερει καποιους(2 τελευτ. παραγραφ.) μαζι με μενα που εψαχνα μαθηματικους τυπους για το diffraction. Κ υπαρχουν πολλααα calculators εκει εξω...ααχχχ
Hi Nikos,
The answer is both "yes" and "no" and will require a bit of explanation. BassBox 6 Pro includes a "diffraction response shelf" option for its graphs that is a very rough approximation of the response shelf that occurs at the point where the wavelengths are short enough to no longer be able to bend around the cabinet. However, this feature is only available for a common square prism box shape and is based on the circumference of the front panel of the box. Therefore, the box dimensions must also be present before the feature will work. None of the other box shapes include this feature. And, again, it is a very rough approximation.
If the "diffraction response shelf" feature is used in BassBox 6 Pro and that enclosure design is imported into X-over 3 Pro with the woofer, then you can show the "diffraction response shelf" in X-over Pro also (however, you will not be able to change its parameters---all you'll be able to do in X-over Pro is turn it on and off in the graphs).
In most cases, we believe that you would be better off not using the approximation in BassBox Pro and, instead, measure the actual transfer function of your listening environment at your listening position and import it into BassBox Pro for the Room/Car Acoustical Environment. This is because the diffraction response shelf is easily misapplied. It basically assumes that the speaker is located away from all reflective surfaces. You would need to suspend the speaker high in the air or place it inside an anechoic chamber for this to be true.
In the real world, most speakers are located near floors, ceilings and walls. This renders the diffraction response shelf unhelpful and speaker designers lacking an understanding of room acoustics fail to realize this. In the vast majority of cases, the room (or acoustical environment, whether it is an automobile, theater, stadium, etc) will have a much more dramatic effect on the response of the speaker than the diffraction response shelf.
Best regards,
perator: