Empire Acoustical Systems (EAS) based in Round Rock, Texas and Princeton, Illinois, focuses on the custom engineering, fabrication, and installation of acoustical enclosures, noise barriers and sound absorptive wall mountings.
Use of EAS’s M-90 “Backless” wall mounted sound absorption panels the Angle-Lok, the Silent Screen “Standard” and Silent Screen “Septum” panels may: Their sound absorptive panels are designed for wall-mounting indoor and outdoor applications, such as (but not limited to) attenuating the sound from highways, mechanical equipment yards or HVAC rooms within a building. These products provide excellent sound attenuation, thermal and fire resistance, are manufactured using a high percentage of pre and post-consumer recycled materials, and have little to no VOC content.

– Improve Building Durability
– Reduce Demand for Raw Materials
– Conserve Energy and Electricity
– Improve Indoor Environmental Quality


The EAS sound absorption panels are fabricated from either 16 or 22 gauge galvanized steel and may be coil coated or powder coated depending on the application. The Angle-Lok panel is a 22 gauge cold formed sheet steel panel in which the sound strikes the panel and is reflected back to the noise source. The M-90, Silent Screen and Silent Screen Septum panels are either 16 or 22 gauge steel panels where the steel tray is filled with mineral rock wool insulation. Mineral rock wool insulation is made in a process using basalt and iron-ore slag that is melted, spun into fibers, and held together with a phenolic resin. This insulation absorbs the remaining sound not reflected back towards the noise source.Photo Credit: Empireacoustical.com

All four EAS sound absorbing panels are non-corrosive, have a melting point of over 2,000 degrees Fahrenheit, and have a flame spread of less than 15 and a smoke development of 0 when tested in accordance with ASTM Standard E-84. They are rated incombustible by ASTM Standard E-136, are non-hygroscopic, and have a Noise Reduction Coefficient (NRC) of greater than 1 and Sound Transmission Class (STC) between 22 and 39. When specified, the EAS panels may use an alternative absorptive material such as fiberglass.

The EAS M-90 “Backless” wall mounted panels are a 22 gauge cold formed sheet steel panel and use a two-inch mineral rock wool sound absorbing batt with a density of 6 pounds per cubic foot with a galvanized or pre-coated steel face panel. Since the M-90 panel is backless, it does not have an STC rating. The Silent Screen “Standard” panel is either a 16 or 22 gauge sheet steel panel with a 2-3/4” layer of mineral rock wool insulation, and the Silent Screen “Septum” uses a 3” layer of insulation.

LEED Credit Overview

Energy & Atmosphere:
Prerequisite 2: Minimum Energy Performance
(M-90, Silent Screen and Silent Screen Septum)

Credit 1: Optimize Energy Performance (1-19 points, New Construction/Schools OR 3-21 points, Core & Shell)
(M-90, Silent Screen and Silent Screen Septum)

Materials & Resources:
Credit 4: Recycled Content (1-2 points)
(All products)

Credit 5: Regional Materials (1-2 points)
(All products)

Indoor Environmental Quality:
Credits 7.1: Thermal Comfort, Design (1 point)
(M-90, Silent Screen and Silent Screen Septum)

Prerequisite 3: Minimum Acoustical Performance
(LEED BD+C for Schools)
(All products)

Credit 9: Enhanced Acoustical Performance
(LEED BD+C for Schools) (1 point)
(All products)

Innovation in Design:
Credit 1 (1-5 points)
(All products)


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