Kaushik Sunder, research scientist at Ossic, talks about immersive hearing—how humans hear in three dimensions. Topics include the anatomy of the ear and how head-related transfer functions (HRTFs) affect the spectral balance of what we hear based on the direction from which a sound comes as well as individual characteristics such as the shape of the outer ear and size of the head. He also discusses binaural recording, and we listen to a clip of such a recording he made in Bali; for more of Kaushik’s binaural recordings, click here. Finally, he describes the Ossic X headphones and how they reproduce 3D immersive sound. Also, answers to chat-room questions and more.