Measurement and adjustment methods of sound source direction perceived through bone-conduction headphones

We investigated the perceived direction of the arrival of sound using bone-conduction headphones. Sounds were separately presented through air-conduction headphones or bone-conduction headphones in a series of experiments and participants judged the direction of arrival. The perceived direction through the bone-conduction headphones inclined toward the center. We propose a design concept to compensate for this discrepancy of the perceived direction of arrival for hearing aids.