Noise from side channel blower and how to reduce it?

Normally the noise caused as below reasons:

1.     the side channel blower body shake and cause noise

2.     the impeller,electric motor and bearing running case noise

3.     air suction into inlet and come out from outlet,which is the main reason for noise.

How to reduce and control the noise of side channel blower?

1.     add an isolation box

2.     add silencers at inlet or outlet

3.     use soft pipe to link with the inlet and outlet of blower instead of the stainless pipes .

4.     while install the  blower,use the shakeproof floor mat.