It occurred to me that I don't think I ever reported back to this list on the bone conducting headphones I was sent for review. they're branded as Aftershokz and were apparently developed out of military technology. It's obviously important for a soldier to be aware of what's going on around him as well as having to pick up communications from his radio. These phones sit, not on or in or over your ears, but on the cheekbone just in front of them. The sound is then conducted from the cup through the bone and into your ear canal. This is thought to be particularly useful for blind people who need to use GPS while out and about but also need ears to alert them to things happening in the environment. Sounds like a good idea? The only problem is that the quality of the repro from the headphones is not very good. Also having the sound delivered in this way does something odd to the stereo image. So for music, for instance, they're really disappointing. Also I do much of my listening in very noisy environments and, even with these turned up full, they just don't have the poke I need. However, one use I have found for them is at work and other meetings. If I use them with my computer - as I am now with my MacBook - I can type away but still here what's happening around me in the office. I've also used them in governor's meetings at my son's school where, using my iPhone and Braille display to make notes, I can listen through the phones while remaining aware of what's going on in the discussion. So I'd definitely recommend them to anyone who does a lot of listening to speech synth while using computers and other gadgets. They sell for around fifty quid. Google Aftershokz (Note spelling).