Certified Acoustic Physics Laboratory has conducted Laboratory testing on SST Tube Bass Trap units type D35 in the echo chamber.
The test procedure includes the echo chamber in which is placed 10 Tube Bass Trap Absorbers, each 1.06 meters high, 0.35 meters in diameter.
Total Absorption sample surface is S = 11.3 m2.
Total Echo room volume V = 194.8 m3
Air temperature 22.9 C
Relative humidity 38.7 percent
Air pressure 101.6 kPa