Siri’s response to “Hey Siri”

While this doesn't bother me in the least, there was a thread a while ago, where some were bothered by it. The answer I believe is you can't.

You can however, provide feedback to Apple via this link --> Feedback - iPhone - Apple

No.

You can minimize the chances of it happening if you don't wait after saying "Hey, Siri". Just say the whole thing, "Hey, Siri, what's the diameter of the earth?".

You're welcome. And The advice just above is the best way to avoid un-huh if it annoys you.

Glad to hear it.