![]() ![]() Sound transmission loss is very much a “weakest link” situation. There are often many options for improving STC performance, but sometimes a specific problem requires a specific solution. ![]() Ask for the lab report to validate any manufacturer’s claim. There is no such thing as “sound proof.” Noise control products are lab tested to determine performance according to ASTM E90 (sound transmission loss (TL)) and ASTM E413 (STC). Performance improvements are incremental and not absolute. These materials are designed to increase the Sound Transmission Class (STC) rating of an assembly or prevent unwanted leakage that the limits the performance of an existing installation. The following is a list of sound insulation (sound proofing) products and treatment manufacturers.
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