How does a transformer make clicking sounds when being powered ON or when it is bucking/boosting voltages, without having any moving parts inside?
In: 5
Magnetostriction.
In the presense of a concentrated magnetic field, materials tend to change shape for a brief moment. Depending on how everything is configured, something will either rub or hit on another component and…click.
Edit.
Even if there is nothing to hit or rub on each other, Depending on the frequency of the field, it can cause a hum can be heard.
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