The technology is specially designed for headphone to allow the listener to distinguish the direction and the distance from a sound source, just as if the listener is in a natural environment. The technology relies on optimizing the three factors that human being uses to distinguish sound source location and sound source distance. They are relative loudness, relative pitch and relative reverberation.;The technology makes use of the specially-designed sound box with specific construction and specific materials to re-create the 3D hearing feeling. The specially-designed sound box generates appropriate amount of reflection, reverberation and interference at different frequency range, which optimize the three principal factors.
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