how to reduce humming noise in transformer?

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how to reduce humming noise in transformer? ..

following methods are there:
1) reduction of induction in the core.
2)adequate design and costruction of core.
3)insertions of vibrations insulating comonents inthe
transformer tank.
4)adequate construction of tank.

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how to reduce humming noise in transformer? ..

Answer / javad

gopi s answer s correct

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how to reduce humming noise in transformer? ..

Answer / praveen

we cant eliminate humming noise completely but partially eliminated on tighting of bolts around the laminated core

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