I hope it is OK that I share some of our insights on this matter as well since DreamScreen has been mentioned quite a number of times in this comparison thread, specifically the acoustical transparency in this case. I took the liberty of ordering some samples of the SoundMax 4K and compared it to the V6 using our regular measurement rig. Disclaimer; this is NOT a lab grade A/B measurement as the SoundMax 4K samples were to small to fit our rig, please see pictures. However, the fact that the SoundMax samples are not perfectly stretched up should not have any major implication on the measurement as such, and the slight overlap should neither.
The measurements indicate that the SoundMax without any black backing applied to it, has a drop of 5,[email protected]
while the V6 measures 2,[email protected]
(please note that the V6 has the black backing integrated). At 10KHz, the drop is lower for both the V6 and the SoundMax though, as is always the case for acoustical waves (the larger the waves, the easier it is for them to penetrate). Every measurement was made three times or more for redundancy. The rather small measurement box does add some peaks and dips to the recording of the sweep by the way. As the dB-scale is logarithmic, a 3dB added loss is actually double the acoustical energy being blocked off. Adding a black backing would add another 1-3dB depending on the type (or 5,2dB if another layer of the same fabric as used for the SoundMax is used as backing). Also, when it comes to acoustical blockage, it increases exponentially as the overall SPL decreases, i.e. a drop of 5dB at 80dB would amount to typically 10dB at 70dB (this is just estimates, we have currently not done extensively testing on this parameter). However, if the AT is insufficient, it will potentially muffle the audio and remove micro details. This is a very important aspect for an AT fabrics as far as I am concerned at least, and although one can EQ off some of the restraints put on by using an AT fabric, you would certainly want as much as possible going through it.
Again, these values are not to be taken as "lab grade" by any means, but as an indication of what tightening the weave to the levels of what the SoundMax is at will do to the overall AT properties. Also, please note that I have attached a comparison of structural appearance of the V6, the SoundMax and a micro perf PVC screen and I will let that image speak for itself.
Also, there is certainly light bleed though the SoundMax, so measuring its gain would always have to be done using a black backing. If will see if I have the time to do some gain measurements, but I am not contending that it might have somewhat higher gain than the V6.
Please note that I have no objections on end users doing measurements, and this is not a criticism to the
at all, but I hope my inputs are helpful on better assessing the overall characteristics of the difference of these fabrics nonetheless.