I've noticed just recently on TV1 that certain parts of news stories (seven sharp for example) are causing a very high pitched noise on the TV. I might be on seven sharp as well I heard it last time as well

These are on some parts of the stories which are recorded outside the studio (not the live part of it) .

Anyone else notice this? Maybe recorded via the same camera/sound guy whose system is a little broken?

It was very noticeable in certain parts in the story about Nick Chisholm tonight.