I didn't want to do fluff because the science would be wonky.
The weapon is essentially a giant white noise generator that focuses the sound wave into a confined cone.
Sound in general doesn't really have the properties to focus it into something usable as a direct impact weapon, so I just hand-waved that bad science with more bad science by assuming the clans understanding of HPG tech could overcome that.
So the damage is weak compared to other energy weapons but the impact on the human body is dramatic because it messes with their head.
The level of impact is affected by interference of all the slabs of metal and various forms of electronic interference between the sound wave and the target, and the number of humans represented as the target because genetically some will be more resilient than others.
I threw in extra consideration for enhanced imaging because my rough understanding of it as advanced radar. Therefore firing such a weapon is like putting a target painter on yourself but at the same time they are more prone to having their heads messed with by such a weapon.