Millions now use PCs for VoIP and online audio chat, and you soon realize the quality is vastly better if everybody uses a headset.

But there's a problem on PCs. If you plug in headphones, it usually disables the regular speakers, often in hardware. So if you leave a headset connected, the system can't play a ring sound when somebody calls you.

So time to rethink the design of the headset jacks, and the headsets themselves. Instead of disabling the main speakers, the presence of a plug in the jack should just be a software signal. Both the jack, and the speakers/speaker jack should be independent software-selectable outputs in the sound driver. Plugging in a headset should just change the default output. VoIP software, however, should be aware of this and know to send call audio to the headset, and ringing sounds to the speakers.

However, it could be even smarter than this. It might change its mind if it knows you are at the computer, or at least change the volume of the ringing on the speakers if you are at the computer. And make it louder if you haven't touched the computer in a while.

Beyond that, we could make headsets smarter. They should be able to easily know if you have them on, due to tension in the headband or ear-strap. Earbuds could use a small temperature sensor to know if they are on. This could also effect where we direct sounds. Of course, this involves either a new headset jack, or perhaps more cleverly, a small and inaudible data protocol (or even something as simple as a click protocol) over the existing plugs. Many cell phones use a non-standard headset jack to include extra wires for button signals (such as to answer the phone. This should be formalized.

Of course, with bluetooth headsets and USB headsets, you have the potential for all sorts of additional communication with no change to the jack. A bluetooth headset should be able to tell, via temperature and pressure, if it is on the ear or not. It can even tell quite readily if you're speaking or have spoken recently. Though I doubt most of the world is ready to wear their bluetooth headset all the time, though I do see people doing this more and more.