Aftershokz's Aeropex are refined bone conduction headphones with most of the same snags - The Verge
Amazon.com: AFTERSHOKZ Air Open Ear Wireless Bone Conduction Headphones, Slate Grey, AS650SG
Amazon.com: AfterShokz Air Open Ear Wireless Bone Conduction Headphones, Midnight Blue, AS650MB
Amazon.com: AfterShokz Sportz Titanium with Mic - Wired Open-Ear Bone Conduction Headphones with Microphone - Ocean Blue - 4 ft Wire - 12 Hr Battery Life - 2 Hr Charge Time - Standard 3.5 mm Audio Jack (AS451OB): Electronics