While the demand for high levels is not the main issue for sound reinforcement in churches, often it is the very long reverberation time, which nevertheless requires a thorough planning, in order to ensure a sufficient speech intelligibility. Furthermore, beside the technical aspects, mainly aesthetical considerations and the preservation of monuments are to be included in the process of planning.

The planning is started with by building a CAD model in EASE, which includes all the acoustically relevant planes. In many cases the churches' special architecture requires exceptionally elaborate models. The choice of loudspeakers more and more comes down to column speakers with an electronically controllable directivity, which allows a very targeted coverage of the churchgoers, while at the same time they can be placed rather discreetly.

After installing the system, an accurate calibration is performed, measuring at numerous positions from which the filter curves are deduced.

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