How can we reduce airborne noise generated by transformers?
The proposed options to reduce the noise are as belows: • Install the transformer in a enclosure in which the walls and floor are massive enough to reduce the noise. Noise is usually reduced (attenuated) as it tries to pass through a massive wall. Walls can be of brick, steel, concrete, most other dense building materials. • The enclosures can have a limp well technique. This is a method which uses two thin plates separated by viscous (rubbery) material. As the noise hits the inner sheet some of its energy is used up inside the viscous material. The outer sheet should not vibrate.
