Yamato Co., Ltd is involved in developing, manufacturing and selling the silencers to prevent the noise for industrial silencer, automobile exhaust and home use silencers.

A cleaning service company providing their service of cleaning and also manufacturing and selling the equipment of cleaning had inquired us one day.

Using their accumulated know-how through their manufacturing the equipment for cleaning, this customer had developed a radiation decontamination devices for people in Fukushima that suffered from radiation pollution and begun to sell their equipment to customers in Japan.

But they had received many complaints that the device is too noisy from their users.

We had analyzed the equipment in various ways and developed the 2 silencers for the noise sources of internal-combustion engine and roots blower with compact design for this customer.