a behind - the - head mounted personal audio set that allows a mono - aural personal audio device to be worn in either a wearer &# 39 ; s left or right ear without the need to remove or detach individual components of the personal audio sent and mount is disclosed . in a disclosed embodiment , the personal audio device has two earphone portions and the mount allows the audio device to operate in either mono or stereo modes wherein one of the earphones may be moved away from a wearer &# 39 ; s ear when needed , such as when driving . a boom microphone is preferably pivotally secured to one of the earphone portions .