The ENC STC-25 Acoustical Barrier Blankets are manufactured using state of the art acoustical composite materials with an engineered design.

ENC’s STC-25 acoustical barrier blankets are designed to provide optimum sound control for both blocking and absorbing unwanted noise.  They have been tested by an independent acoustical laboratory per ASTM E-90 and ASTM E-413 requirements and have a verified sound transmission loss.

ENC’s acoustical barrier blankets are fabricated with a proprietary polyvinyl-chloride coated outer shell; layers of noise absorbing and blocking material; an engineered inner core with an X-5 septum barrier.

About the STC-25 Acoustic Blanket

  • Specs

  • Sound Transmission Class rated in accordance with ASTM E-413
  • 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

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