why do we hear sounds when we stand under high tension lines?

Question

i want a proper detailed answer.

Answer 1

What you are hearing is called corona discharge, which is generally arcing across the insulators. The current involved is usually far too small to trip the protective circuit breakers on the line(s). At night or on a dark day when the humidity is very high, or it's raining, you may actually see the phenomenon

Answer 2

Mr Helmet has given a good description technically.It is actually a weak arc which ionises the air in the periphery of the conductors resulting in the rumbling and effervescence around the conductors

Answer 3

sound propagetes through air,without any media it can't.
under the high tension line there the air exists.although being high tension line it can charge the air particles surround its,but the air exists.so we can hear the sound.