Bluetooth 50 Open Draadloze Sportkoptelefoon Surround Sound Stereo HD Handsfree voor Hardlopen en Fietsen1729550

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 HearingOpen-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.