Weird Notification Sound

Well done for posting that info for the benefit of others.

Denis

Padisha said:

I read someone saying they had the same issue that was caused by a browser extension, another person talked about Steam and I indeed have a Steam pricechecker extension. I've disabled it and haven't heard from it since. Also, the sound is the exact sound made in OP's post, I thought I'd drop this info for any future googlers.

Thanks for your contribution.

It will likely assist another user in identifying a solution to this annoyance.

Padisha said:

Thank you both! Hope it saves somebody some frustration haha

You're most welcome.