Answer / anil

due to magnetostriction and presence of harmonic components also

Answer / srinivas

overloading is the main reason

Answer / meenakshi

simply speakin its because of the magnetostriction effect.

hey guys, i found the following link to be more informative
n understandable. to ave more knowledge on tis topic,plz
check it out without fail...

http://www.federalpacific.com/literature/drytrans/10transfor
mernoise.pdf

Answer / m.manimaran

over loading or loose teriminators

Answer / gautham

It is because of magnetic flux leakage. The efficiency of a transformer is never 100% so some energy is loss through the inductor coil in a transformer this causes the sound.

Answer / ganapati s havaldar

Stapping are in loose.

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