Pineapple's Rumble KW Bone Conduction EarWoofer - Super Bass Woofer Sound Isolating High Fidelity Sound by Vibration (Discontinued by Manufacturer) Bone Conduction Earwoofers offers the True Bass woofer Sound through the bone conduction - delivers strikingly realistic sound through vibration that you can feel through your body. Noise Isolation Earwoofers and Low Air pressure to your eardrum which can reduce the hearing damage. 4D-Motion-Sound Virtual Reality Feeling: If you are a game player, you will be able to feel the virtual battle fields or racing tracks in your ear. You can feel the virtual movie theater in your ear and you can feel the virtual night club in your ear. Wide Frequency range of 20 Hz - 21 kHz delivers the dynamic detail. 100% Water Proof The Bone Conduction Transducer converts electric signals into mechanical vibrations that are received by the bones in the skull which stimulates the auditory nerve which converts the vibrations to sound.