Acoustics

Ecore Commercial Flooring makes it easy to address your acoustical concerns, while using surfaces with an attractive finish.

There are two types of acoustic problems that can be addressed with your flooring:
Sound Transmission and Interior Room Acoustics.

Sound Transmission

For problems with sound being transmitted from one space to another (usually from upstairs to downstairs) we consider IIC and STC ratings.

IIC Ratings

Impact Insulation Class

IIC ratings are related to structure-borne sound transmission and can be greatly affected by the flooring.

Acoustical underlayments and floor coverings will improve the IIC rating according to their physical material properties. More rigid materials will be less effective than ones that offer some internal damping or soft/fibrous materials. Keep in mind that:

  • No single floor underlayment or floor covering carries an absolute IIC rating by itself.
  • The product's rating is always dependent on the rest of the floor-ceiling assembly.
  • When comparing various products, make sure you compare ratings which were the result of comparable test assemblies.
    In other words: don't compare Product A tested on a 8" slab with a gypsum board ceiling to Product B tested on a wood truss assembly with no ceiling.
STC Ratings

Sound Transmission Class

STC ratings are related to airborne sound transmission and have little to do with the flooring used. You will notice that our STC ratings below do not fluctuate significantly with different flooring. If you are dealing with an STC problem, you will need to take a closer look at your entire floor-ceiling assembly and how you can adjust the mass and air tightness of each component.

PRODUCT
IIC per
ASTM E492
STC per
ASTM E90
IIC per
ASTM E2179
NRC
Rating
LVT, 2.5mm
No Data
No Data
3
0.05
typical
Homogenous Sheet Vinyl, 2mm
No Data
No Data
8
0.05
typical
ECOsurfaces, 3.2mm
50
56
20
0.05
Forest/ Terrain rx
52
56
23
0.15
Galaxy rx
54
50
23
0.10
Carpet
0.20

Interior Room Acoustics

For problems regarding the acoustics within a single room, NRC ratings will be most relevant.

Below you will find baseline acoustical data for our products. For more information or for ratings on alternate assemblies please contact Ecore's Technical Services department.

Tip: When reviewing test results below, keep in mind that a standard 6" thick concrete slab is generally expected to achieve an IIC rating of 28 with no floor covering or ceiling below.

NRC Ratings

Noise Reduction Coefficient

NRC rating is a measure of how absorptive a finish is, or how much sound is absorbed by a finish when the sound comes in contact with it.

  • NRC ratings are given in a decimal format from 0 to 1. The higher the number the more absorptive it is.
  • Smooth surface flooring typically carries a lower NRC rating (usually below 0.20) and is not as absorptive as acoustical wall or ceiling panels
  • NRC ratings can still be helpful to consider when designing a space

ECOsurfaces & Tru

All results below tested over 6" slab with no ceiling

Line
Product
IIC
STC
Δ IIC
NRC
ECOsurfaces
3.2mm Granite Run
IIC 47
STC 56
19.0
0.05
ECOsurfaces
8mm Sharin Stone
IIC 52
STC 55
21.0
0.10
ECOsurfaces
8mm Red Hots
IIC 53
STC 54
22.0
0.10
ECOsurfaces
8.2mm ECOfit
IIC 51
STC 51
23.0
0.10
ECOsurfaces
15mm ECOrx
IIC 57
STC 54
28.0
0.20
ECOsurfaces
1" ECOmax
IIC 56
STC 52
27.0
0.20
ECOsurfaces
2.5" ECOmax
IIC 58
STC 51
26.0
0.20
ECOsurfaces
2.5" ECOsmash
IIC 59
STC 49
29.0
0.25
Tru
Forest/Terrain rx
IIC 52
STC 56
23.0
0.15
Tru
Galaxy rx
IIC 54
STC 50
23.0
0.10
Line
Product
IIC
STC
Δ IIC
NRC
Tru
Forest/Terrain rx
IIC 52
STC 56
23.0
0.15
Tru
Galaxy rx
IIC 54
STC 50
23.0
0.10
ECOsurfaces
3.2mm Granite Run
IIC 47
STC 56
19.0
0.05
ECOsurfaces
8mm Sharin Stone
IIC 52
STC 55
21.0
0.10
ECOsurfaces
8mm Red Hots
IIC 53
STC 54
22.0
0.10
ECOsurfaces
8.2mm ECOfit
IIC 51
STC 51
23.0
0.10
ECOsurfaces
15mm ECOrx
IIC 57
STC 54
28.0
0.20
ECOsurfaces
1" ECOmax
IIC 56
STC 52
27.0
0.20
ECOsurfaces
2.5" ECOmax
IIC 58
STC 51
26.0
0.20
ECOsurfaces
2.5" ECOsmash
IIC 59
STC 49
29.0
0.25
Line
Product
IIC
STC
Δ IIC
NRC
Tru
Forest/Terrain rx
IIC 52
STC 56
23.0
0.15
Tru
Galaxy rx
IIC 54
STC 50
23.0
0.10
ECOsurfaces
8mm Red Hots
IIC 53
STC 54
22.0
0.10
ECOsurfaces
8.2mm ECOfit
IIC 51
STC 51
23.0
0.10
ECOsurfaces
15mm ECOrx
IIC 57
STC 54
28.0
0.20
ECOsurfaces
1" ECOmax
IIC 56
STC 52
27.0
0.20

Because at Ecore we believe less noise is MORE.