ENC offers modular K-rail mounted temporary sound walls in a variety of heights, built to fit your needs.

Our K-Rail mounted noise barriers can be quickly positioned in place and moved as necessary to provide a flexible noise control solution for mobile equipment or operations.  Our newly redesigned double K-Rail frame allows for heights up to 20 feet, depending on site and environmental restrictions.  The K-Rail mounted barrier is an effective solution if your project does not allow earth boring.

At the heart of our free-standing noise control systems are our ENC noise barrier blankets which are manufactured using state-of-the-art acoustical composite materials.  They are available in STC-25, STC-32 with NRC overlays.

All of ENC’s acoustical blanket materials have been tested by an independent laboratory.

Engineering/calc packages available.

About ENC’s Temporary Sound Wall

  • Specs

  • Sound Transmission Class rated at STC-25 OR STC-32 in accordance with ASTM E-413
  • Engineered to meet UBC/IBC Wind Load Requirements
  • Flame Retardant to California Fire Marshall f-419.01 Specifications
    • Length of Char: 3.5, After Flame: 2 seconds
  • Working Temperature: -40°F to +200°F
  • Oil Resistant, UV Resistant, Fiber-Free, Anti-Fungal, Self-Drying Poly-Vinyl Chloride Outer Shell with specifically developed inner core septum barrier
  • NRC Overlays Available

STC-25 Sound Transmission Loss (dB)

% Octave Band Center Frequency STC-25 Transmission Loss % Octave Band Center Frequency STC-25 Transmission Loss
63 Hz 8 dB 630 Hz 33 dB
80 Hz 10 dB 800 Hz 36 dB
100 Hz 11 dB 1000 Hz 39 dB
125 Hz 10 dB 1250 Hz 41 dB
160 Hz 7 dB 1600 Hz 41 dB
200 Hz 7 dB 2000 Hz 40 dB
250 Hz 11 dB 2500 Hz 41 dB
315 Hz 17 dB 3150 Hz 44 dB
400 Hz 23 dB 4000 Hz 46 dB
500 Hz 28 dB 5000 Hz 50 dB

STC-32 Sound Transmission Loss (dB)

% Octave Band Center Frequency STC-32 Transmission Loss % Octave Band Center Frequency STC-32 Transmission Loss
63 Hz 16 dB 630 Hz 34 dB
80 Hz 20 dB 800 Hz 35 dB
100 Hz 18 dB 1000 Hz 35 dB
125 Hz 16 dB 1250 Hz 36 dB
160 Hz 16 dB 1600 Hz 36 dB
200 Hz 17 dB 2000 Hz 36 dB
250 Hz 19 dB 2500 Hz 37 dB
315 Hz 23 dB 3150 Hz 39 dB
400 Hz 26 dB 4000 Hz 40 dB
500 Hz 32 dB 5000 Hz 43 dB