Abstract: An acoustic wall has vertical support posts which seat within hollow spikes in the ground, but only to the level of an above-ground-level (or near ground) support post cuff in the hollow spike. When such vertical support posts are used to support a plurality of acoustic panels, the combination allows wind to pass between the panels but, in excessively heavy winds, the entire wall safely flattens on site, due to the vertical support posts' not extending below ground level.