I've just had my BT Home Hub 5 for a few days and really pleased with the service on Infinity.

However, I have noticed that the Home Hub makes a slight hissing noise when I am downloading a large file or movie at full speed.

It's not a big issue but was just wondering if anybody else has noticed this or what it might be?

cant say i have noticed ill be honest

Mine is silent, at all times.

I've noticed that it only happens when I'm using my computer which is connected at the 5Ghz frequency. When doing the same on 2.4Ghz, it is silent as ever.