Compact spherical loudspeaker arrays

Abstract

This chapter introduces auditory objects that can be created by adjustable-directivity sources in rooms. After showing basic positioning properties in distance and direction, we describe physical first- and higher-order spherical loudspeaker arrays and their control, such as the loudspeaker cubes or the icosahedral loudspeaker (IKO). Not only static auditory objects, but such traversing space by their time-varying beam forming are considered here. Signal dependency and different practical setups are discussed and briefly analyzed. This young Ambisonic technology brings new means of expression to sound reinforcement, electroacoustic or computer music.