Improved HRTF-Based Pseudostereophony

An improved pseudostereophonic system utilizes digital filtering and head-related transfer functions (HRTFs) to afford tailorability and sound quality not available from older pseudostereophonic systems. Although the term "pseudostereophony" may not be widely known, the underlying concept has been studied and applied for more than four decades. Pseudostereophony is a family of techniques for deriving right and left channels of sound from a single-channel (monaurally recorded) source to give the listener an impression of sound coming from more than one direction.