OT: Can anyone identify this strange computer sound?

It's looking for passing submarines.

Sorry. It's not a sound that I recognise as a normal PC notification.

I don't recognise the sound, but if you right click the speaker icon in the tray after it's done it, and go to volume mixer, it usually shows individual sliders for any apps that have recently played sounds, so look for apps other than the "usual" such as browsers and media players.

It's not a key temporarily sticking down, is it?

And anti virus and dropbox or other cloud storage systems as there seems to be an outbreak of noise generation of late, no doubt trying to emulate the smart phones. Brian

What is the current sound for usb device or USB device failed to initialise. I have found if you set the settings in some configs, these errors do not generate the text but still make a noise. I use non standard noises but maybe its something similar to that, wiggle you usb devices about in the sockets. I had a sticky caps lock key once that made a sound like that but it was multiple not just one offs like your recording.

Brian

I would check that you haven't caught a virus and that your browser is closed.

That is the closest sound I can think of too. :-)

It might be worth running the machine in Safe Mode for a while, to eliminate some background tasks. My Thunderbird bleeps when a new mail comes in - perhaps it's something to do with your mail program?

A suggestion in the other group, is a Chrome extension.

Only you know what you've got for Chrome Extensions.

Paul