What is STC value?
STC (Sound Transmission Class) value is a single number rating to specify the reduction in sound levels that the partition provides. The sound transmission loss performance of a partition is measured using ASTM E 90 “Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements” and calculated according to ASTM E 413 “Classification for Rating Sound Insulation.” As a general rule, the higher the STC rating, the better the partition’s acoustical performance.
Related Questions
- Rateable Value Q: A premises has 50% of their rateable value waived as a charitable organisation. How should the applicant calculate the rateable value of the premises for conversion purposes?
- Can a higher STC value be achieved if faced fiberglass insulation instead of unfaced insulation is used in a partition?
- Where should the insulation batt be placed within the floor cavity to produce the highest STC value?
