High acoustic performance Eckoustic panel systems provide an efficient, economic and reliable method for reducing noise in engine generator, blower and pump rooms, and other sections of wastewater and water treatment plants. Ideal for new construction and for upgrading/rehabilitating online facilities, the Eckel systems include: Eckoustic Functional Panels, an advanced design, durable unit wall and ceiling acoustic panel system, easily installed without disturbing existing utilities to rapidly add needed sound-absorption to any area; and Eckoustic Modular Panels, pre-engineered, rugged panel system for quickly constructing enclosures/walls to effectively isolate personnel from noisy equipment/machinery.