"Reduce low frequency and ultra-low frequency" RASK soundproof door
Soundproof door that reduces ultra-low frequency and low frequency! Suitable for tunnel blasting work.
Using vibration reduction technology with porous cast iron RASK, we enhance the soundproofing performance of conventional soundproof doors. It is capable of blocking ultra-low frequency sounds. In a nearby residential area where blasting excavation noise reached approximately 87 dB with standard soundproof doors, the introduction of RASK soundproof doors resulted in a reduction to 57 dB. Since then, there have been about 27 instances of RASK soundproof doors being used in public works, proving their effectiveness in critical situations.
- Company：スイサク
- Price：Other
