One of the features I don't understand is this array of slots and protrusions. My guess is that is supposed to act as a slot array for extremely low frequencies because the size and distances are so large. But I can't think of any instrument, except for the organ, which produces such low notes. My other guess is that there is motor noise from something, perhaps in the ceiling itself or above like the HVAC unit and this array alleviates that problem.
If you have any ideas, please let me know.
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