Contribution
Directional controllable compact pentacis dodeceder speaker system
* Presenting author
Abstract:
Based on a compact omnidirectional loudspeakersystem consisting of 98 full-range speakers mounted on a spherical surface with a diameter of 0.33m a direction-controllable loudspeaker system has been developed, with individually controllable loudspeakers. The spherical housing accommodates the individual cabinets of the speakers and the signal routing. The control is carried out via 98 class-D amplifiers, which are fed ecactly by sample, e.g. via MADI. The system can be used to rebuild the sound radiation of real radiators, to direct sound radiation in all directions, or as an individually directed, bundled or non-directional measurement sound source for acoustic room assessment, additionally modifiable with beamforming techniques and to obtain room impulse responses, where a specific direction pattern is required. When selecting the drivers, the focus was on the goal of producing the smallest possible sphere and at the same time achieving the highest possible sound pressure and the widest possible bandwidth. A subwoofer as the speaker's tripod base can be used to extend the frequency range to low frequencies. At present, the control is carried out from a DAW, in which the pre-processing is also carried out. The prototype and measurement results are presented.