Tsujiou Kosho (HST) produces original brand HST scarf. In addition, we produce and sell silencers such as construction machinery and other soundproofing devices using the ability of the accumulated with automobile silencers.
The muffler is a device that mutes exhaust emissions from the engine and directs to the air where it does not cool at the same time.
In addition to insulating and expanding in the silencer, the exhaust gas cools out by heat dissipating from the surface of the silencer.
The sound-silencing structure is a mainstream combination of expansion rooms, resonance rooms and diversion-structures, but nowadays, a low frequency resonance chamber is often used to reduce indoor stuffiness.