A Device Specification Method Using Doppler Effect of Acoustic Waves

How can you specify a device in the case of file sharing among multiple devices on that spot (e.g., a meeting picture of a social gathering or an alumni association)? One solution is to specify the partner device address (e.g., e-mail address or Bluetooth device address) on your own, but users sometimes feel annoyed or make a mistake with this operation. In this paper, we newly propose a device specification method by user operation of describing a circle in the air, enabling the user to be unaware of the device address. The proposed method uses the Doppler Effect of acoustic waves generated by the operation, enabling to specify multiple partner devices simultaneously and distinguish the device with which you do not want to share, without any pre-planned infrastructure. We measure its performance via an implemented application. The experimental results show that its performance is sufficient for the above use case.