Hearing devices which vibrate around the tragus have been adopted as "bone conduction (BC) headphones", with potential for mixed reality in auditory as well as open-ear headphones using air conduction (AC). However, reproduction of sound images with these devices is yet to be established since the multiple sound/vibration transmission paths are still on exploration. Although relevant findings in human-machine interaction and audiology have been reported recently, there needs more work to bridge these across research areas enough to put into technical implementation. Accordingly, a practical compensation method for spatialization is investigated: combined lumped-parameter circuit model of the transmission pathways of BC to compensate head-related transfer functions for AC. This presentation reports on preliminary results and discussions on possible compensation procedure.
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