Sound Wall Product Specifications

View detailed product specifications and industry technical ratings on AIL Sound Walls.

Take a good look at our STC and NRC ratings

Industry-leading sound mitigation
There are two ways to measure a sound barrier’s performance — Noise Reduction Coefficient (NRC) and Sound Transmission Class (STC). NRC measures the volume of sound absorbed versus the volume reflected, while STC measures the volume of sound that the wall allows to pass through. As shown below, all our sound wall products meet and surpass recommended NRC and STC standards.

Silent Protector Tuf Barrier

Product Specifications

Silent Protector® (Absorptive)

Tuf Barrier® (Reflective)

Span1

8 ft -16 ft (2.44 m -4.87 m)2

8 ft -16 ft (2.44 m -4.87 m)2

Panel Width

2.70 in (68.58 mm)

2.70 in (68.58 mm)

Panel Height

5.96 in ± .10 in
(151.38 mm ± 0.25 mm)

5.96 in ± .10 in
(151.38 mm ± 0.25 mm)

Weight

4.30 lbs/ft2 (21 kg/m2)3

Min. 4.10 lbs/ft2 (20 kg/m2)4

Wall Height

Greater than 30 ft / 9 m

Greater than 30 ft / 9 m

STC Rating

up to 395

up to 366

NRC Rating

0.957

n/a

  1. Span is governed by wind loads and varies on code requirements. Contact AIL Sound Walls for recommended panel spans for your project.
  2. Achieve spans of up to 16 ft (4.88 m) with Silent Protector XL® or Tuf-Barrier XL®.
  3. Weight of Silent Protector Plus® is 7.3 lbs/ft2 (36 kg/m2).
  4. Weight of Tuf-Barrier Plus® is 7.5 lbs/ft2 (36.5 kg/m2).
  5. Standard Silent Protector® has an STC rating of 32. Silent Protector Plus® can achieve an STC rating of 39.
  6. Standard Tuf-Barrier® has an STC rating of 31. Tuf-Barrier Plus® can achieve an STC rating of 36.
  7. Standard Silent Protector® NRC is 0.95. Silent Protector Plus® NRC is 0.90.

     Sound Transmission Loss ASTM E90 / E413

Octave Band Number

2

3

4

5

6

7

STC

Center Frequency (Hz)

125

250

500

1000

2000

4000

Silent Protector ®

23

21

28

42

48

49

32

Silent Protector Plus®

30

28

34

43

45

49

39

Tuf-Barrier ®

23

19

30

45

45

54

31

Tuf-Barrier Plus®

24

21

36

45

49

57

36

    Sound Absorption Coefficients ASTM C423/E795

Octave Band Number

2

3

4

5

6

7

NRC

Center Frequency (Hz)

125

250

500

1000

2000

4000

Silent Protector ®

0.29

0.80

1.13

1.00

0.96

0.72

0.95

Silent Protector Plus®

0.28

0.71

1.06

0.97

0.94

0.78

0.90

 

STC – Sound Transmission Class
STC is an integer rating used to measure the decibel reduction through a partition. It states the number of decibels lost through that partition in a laboratory environment.

NRC – Noise Reduction Coefficient
NRC is a rating between 0 and 1 to index how absorptive a material is. An NRC of 0 means no sound waves are absorbed, whereas a rating of 1 means all of the sound waves are absorbed.

NRC

Qualitative

0.4 or less

Poor

0.5 to 0.6

Mediocre

0.6 to 0.7

Good

0.7 to 0.85

Very Good

> 0.85

Excellent

0.95

AIL Silent Protector®

The AIL Group of Companies