Why Do Power Lines Produce A Buzzing Sound? - Science ABC

The sound we hear from power lines results from a phenomenon known as corona discharge. This occurs when the air surrounding an electrically charged conductor becomes ionized and causes an electrical discharge.

Have you ever heard a buzzing sound from the high power lines overhead or near transformers? These sounds are flat and monotonous but hard to ignore. Do you know why they are produced?

High voltage power lines
High power lines produce a buzzing sound, which is more clearly audible at night. (Photo Credit: Pxhere)

Let me start by telling you that that buzzing sound actually has a name!

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