Product Performance

Sound Transmission Control (STC)


STC is expressed in decibels (dB) and is used to measure a building material's ability to reduce sound. A higher STC rating translates into more reduction in sound. Laboratory testing is used to measure the resistance of partitions such as walls, windows, or entry doors to the passage of sound.

STC test results are presented below.

Blink Blinds + Glass - product performance - sound transmission control

STC Values

ODL conducted third party IAS-accredited lab testing on a range of doorglass configurations. All of the doorglass samples were 22" x 64", except the sliding patio door blind which was 33" x 74". These sound transmission loss tests were conducted in accordance with ASTM E 90. The Sound Transmission Class (STC) rating was calculated in accordance with ASTM E 413. Test results and benchmark values are presented below.

Family Configuration STC Comment
Blinds Dual-glazed doorlite blind, 1-1/8" IG,
with Intercept® spacer, plastic frame,
slats lowered and closed
32 Third party tested
(394 K) Adobe PDF
Sliding patio door blind, 1" IG,
Intercept® spacer,
slats lowered and closed
28 Third party tested
(394 K) Adobe PDF
Door and
3' x 7' steel door,
1-3/4" thick with polyurethane core
26 From HUD Noise
30" x 48" aluminum clad
casement window,
1" IG with 1/8" panels
29 From HUD Noise

* Source: HUD Noise Notebook chapter 4 supplement, Sound Transmission Class guidance