Two ways for the human ear to hear sound:
(1) Air conduction: the sound wave is transmitted to the auricle through the air and through the external auditory canal, causing tympanic membrane vibration (2) Bone conduction: in addition to air conduction, bone can also transmit sound. The skull vibrates, sending the sound to the inner ear, which can also be heard.
A New Way Of Hearing（Open-Ear Design）
AIR Conduction Technology.Delivers Sound Directionally.Dual listening sports Bluetooth headset （Not really bone conduction earphones）
Notice : Open Ear Design AIR Conduction Technology--Dual listening speaker
earphones are not really bone conduction earphones. Many other sellers on the platform wrote this type of bone conduction earphone for the purpose of sales.