Annu Int Conf IEEE Eng Med Biol Soc. 2022 Jul;2022:4179-4182. doi: 10.1109/EMBC48229.2022.9871490.
High-frequency sounds above 20 kHz presented via bone conduction can be heard clearly and transmit speech information using amplitude modulation. Additionally, bone-conducted ultrasound (BCU) can be perceived even when the vibrator is presented to body parts distant from the head, such as the neck, arm, and trunk. To evaluate this previously presented BCU hearing, word intelligibility and monosyllable articulation tests were conducted in Japanese. The results suggested that a practical speech transmission, comparable to ordinary BCUs presented onto the head, can be obtained by distantly presented BCU.
通过骨传导呈现的 20 kHz 以上的高频声音可以被清晰地听到，并使用调幅传输语音信息。此外，即使将振动器放置在远离头部的身体部位，如颈部、手臂和躯干上，也可以感知到骨传导超声（BCU）。为了评估这种之前呈现的 BCU 听力，在日语中进行了单词可懂度和单音节发音测试。结果表明，通过远距离呈现的 BCU 可以获得与普通头部呈现的 BCU 相当的实用语音传输。
