Wired headset connected to smartphone acts as an FM antenna. Probably expands Airhopper's range of seven meters from air gapped computers

There are several posts on FM radio in infected phones (AirHopper) infecting air gapped computers within six to seven meters away.

"Radiation travels through the wire connecting the phone and earpiece and penetrates the head directly through the ear canal. This has been proven to increase radiation exposure to the brain by 300%."

Making calls and listening to music and videos while wearing a wired headset injuries brains.

An air tube headset doesnt increase microwave radiation so would not increase FM radio range.

http://www.rfsafe.com/cell-phone-radiation-exposure-increases-using-wired-hands-free-headsets/

A silver meshed lined flip case reduces microwave radiation so would also reduce range of FM radio. 'RF Safe Launches Samsung Smartphone Flip Cases To Shield Cell Phone Radiation.'

http://www.rfsafe.com/product/rf-safe-microwave-shielded-flip-cases-samsung-galaxy-smartphones/

http://www.prweb.com/releases/2014/01/prweb11478659.htm

Edit: Headset does extend range but AirHopper worked around headset requirement: https://www.reddit.com/r/badBIOS/comments/35r4r8/airhopper_uses_ultrasound_headphones_connected_to/