Electrical Engineering ⇒ Topic : Main factor which produces noise

The following are the main factors which produce noise in transformers :

• Magnetostriction (occurrence of dimensional changes both parallel to, and perpendicular to the direction of magnetisation).
• The mechanical vibrations caused by the laminations, depending upon the tightness of clamping, size, gauge, associated structural parts, etc.
• The mechanical vibration of tank walls.
• The damping