Spensley Horn Jubas & Lubitz
Sound localization control apparatus
 A sound localization control apparatus is used to localize the sounds, which can be produced from a synthesizer and the like, at a target sound-image location. The target sound-image location is intentionally located in a three-dimensional space which is formed around a listener who listens to the sounds. The sound localization control apparatus at least provides a controller, a plurality of sound-directing devices and an allocating unit. The controller produces a distance parameter and a direction parameter with respect to the target sound-image location. The allocating unit allocates acoustic data (e.g., two-channel binaural signals), representing the sounds to be localized, to the sound-directing devices in response to the distance parameter and the direction parameter. Each of the sound-directing devices is applied with each of predetermined sounding directions which are arranged in a horizontal plane with respect to the listener. Thus, each sound-directing device performs a data processing on the acoustic data allocated thereto so as to eventually localize the sounds in each of the predetermined sounding direction. At least three sounding directions are required when localizing the sounds. The sound-directing device can be configured by a finite-impulse response filter. 
Yamaha Corporation
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additional additional inventional
Yasutake Junichi
Suzuki Fujimori