The high-speed door rolling shutter adopts 0.9mm thick pvc curtain imported from France as the curtain, and has tear-resistant fiber inside, which has strong wind resistance. And we have done an experiment. When the fast door is fully opened, the vacuum cleaner is turned on outside the door, and the measured decibel is about 78 decibels. When the door is completely closed, the measurement is only 50 decibels, which is reduced by almost half. It can be said that the sound insulation effect is still fine.

    The following picture shows the decibel diagram before and after the fast door is closed