Screeching sound

[Jamest]

When I turn noise cancelling on my WH-1000XM4 headphones there is a very high pitched screeching noise,

I bought them new a short time after they came on the market can't quite remember when. First problem I have experienced. Anyone advise please. Thanks.

[jumpsuit]

Hi @Jamest  and welcome to the Community

Does the screeching noise stay on or does it stop after a few seconds?

Either way you could try resetting them back to their factory settings to see if this helps at all.

Have a look Here  for instructions.

If this doesn't help then its probably best to get in touch with Support.

[SkyNet404]

Does this happen with all content and all devices? Or, a specific device/content? 

And yea, I would recommend following the above steps to initialize it then test it once more.