I'm unable to find any photos that provide an overall view of the "concert area" to attempt to look at what acoustic properties might be "useful" for limiting outside sound, or any description of which of the multitude of kinds of "shipping containers" it's proposed to use to build the so-called barrier.

That gives very little basis for any prediction of what effectiveness the proposed construction might have.

I do find considerable comment on the generally destructive effects of assembling that large a brainless mob in any area of sufficient size to contain them.

A concern I see is the likelihood that the construction may produce significant additional - apparently unforseen -damage to the park.

The few pictures that may indicate the presence of a "berm" suggest that the most likely construction is earthen, with mostly grass cover. Some pics suggest gravel "pathways" on some areas that may be part of an elevated construction.

The entire area was under severe flooding in January. (For seasonal reference, those of us in the other end of the world must think "like June/july" as a weather reference. April down-under is more like October in the real northern world, so plants are are the end of their growing season rather than at beginning.

The rules applied with some success in camping areas here is that anything "parked" more than 10 days will kill all vegetation under it, so when we camped for the roughly 90 days while we were homeless, we were required to find a new spot every 10 days not occupied by anyone during the previous 10 days in order to be allowed to ignore the rule that you had to leave the park for at least two weeks after any 10 consecutive days of camping there. (We're on fairly good terms with the "campmaster.")

As it appears from the sparse reports, that the "shipping containers" are largely in place as of 14 April, and Easter isn't until the 24th, the "festival managers" apparently need at least 10 days to emplace them all, and will need another 10 to remove them after the festival. With light-blocking "structures" in place that long, all grass will be dead or at least dormant, and with sufficient warm-season remaining for rotting but insufficient time for regrowth, the berms may probably be considered "denuded" of any soil retaining plantings.

Structural inegrity of soil-based elevated structures are at risk with this plan.

It should be of significant concern that the damage will come at the end of the growing season, so the berms will probably have to overwinter with little or no protection.

This concern, of course, is based on inferences from sparse information about the construction of the structures involved, and assumes grass types "ordinary elsewhere" that may not be representative of the kinds common in Australia.

Damage may be less, or more, than I would expect for common park grasses here. Local seasonal conditions may permit reseeding with sufficient growth to achieve some restoration before the weather turns too cool, but I can't make more reliable prediction about the effects of differing biota and climate from here.

John