Inductors and transformers are electromagnetic induction components that are wound with insulated wires and are also commonly used in electronic circuits. In spite of the fact that they look similar, they actually function differently.
What are the causes of transformer noise?The sound power of any mechanical vibration is determined by the rate at which the noise source radiates energy. Flow rate must be described in terms of direction, so sound intensity is a vector, whereas sound pressure is a scalar, with only magnitude and no direction. Most transformer noise measurements can be done with ordinary microphones, which measure sound pressure only.
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