A loudspeaker-array to control sound image distance

Narrow area control for individual sound image generation by combining NBSFC and liner loudspeaker array

In this paper, we propose a method for reproducing different sound for multiple users by forming a narrow area, where the users can listen only the desired sounds. We have proposed a sound field control method for narrow area by combining Null-space Based Sound Field Control (NBSFC) and liner loudspeaker array. NBSFC filtering can suppress the sound pressure on the each control point and mainta...

Distance perception of a nearby virtual sound source reproduced by a linear loudspeaker array

When a virtual sound source is reproduced by a linear loudspeaker array, listeners can perceive not only the direction of the source, but also its distance. Control over perceived distance has often been implemented via the adjustment of various acoustic parameters, such as loudness, spectrum change, and the direct-to-reverberant energy ratio; however, there is a neglected yet powerful cue to t...

A Directional Loudspeaker Array for Surround Sound in Reverberant Rooms

We present a method to enhance the performance of the sound field reproduction approach to 2-D surround sound applicable for reverberant rooms, under the constraint that only a small number of loudspeakers is permissible. The method is based on the idea of using steerable directional loudspeakers to exploit the room reverberation. In home theater applications, exact sound field reproduction is ...

Sound Focusing Based on Optimal Loudspeaker Array Beamforming

Sound focusing is an important problem in audio reproduction, where a virtual acoustic source needs be synthesized in the region surrounded by a loudspeaker array. This problem was tackled in the previous research via the Helmholtz integral approach, brightness control, acoustic contrast control, etc. In this paper, the same problem was revisited from the perspective of beamforming. A source ar...

Loudspeaker Array Processing for Personal Sound Zone Reproduction