Friday 25 July 2014

Good Church Sound System Design Clarifies Words And Music

By Marylou Forbes


From elegant cathedral-like structures to humble store-front rooms in strip malls, most congregations have a weekly gathering place. While a house of worship is more than just a building, its acoustics determine whether worshipers can comfortably hear both music and message. Good church sound system design makes the difference between an involved and enthusiastic congregation, or one that is struggling just to hear.

Most people today have been in spaces with unpleasant amplification issues, and are aware that simply throwing a lot of money at a poor setup may indeed resolve some issues, but can actually end up creating others. Volume may become normal in some parts of a hall, but horrendously loud a few feet away. People using microphones may be loud enough, but impossible to understand. The pulpit speaker might seem disembodied or distorted.

In some rooms, thick carpeting and panels eliminate any trace of echo, while other locations grapple with layers of reverberation. People sitting toward the front might hear the minister easily, but those a few pews back might as well have stayed home. Microphones are not all created equal. Some reproduce human speech well, but when faced with a wide musical frequency range they create muddiness, overtones, and distortion.

Church members sometimes attempt to correct these issues without outside help, even though acoustically fine-tuning a room for both music and sermon may be best accomplished through professional analysis and necessary equipment improvements. Most churches have limited resources, but the costs involved are only one factor in selecting the best components and controls. While sometimes necessary, spending a great deal may not be effective.

An experienced analyst relies on digital equipment to obtain an interior acoustical signature, but depends on the human ear for final judgement. In addition, many use specialized audio software designed for solving these issues. It can accurately determine where problems spots are located, and where the sound will disappear or reverberate. The goal is a dynamic listening experience for everyone attending.

A single speaker may work well in small areas, but large spaces may require several, sometimes creating cold or hot spots. Proper timing and balancing helps to re-shape those spots and provide clean signals to all seats. Without the right testing equipment, precise calibration may be difficult or impossible. Working with an experienced audio room designer takes most of the guesswork out of optimizing a system.

Most services are a combination of speech and music, and a well-designed configuration should be able to reproduce both equally well. Speech amplification needs microphones that clarify specific types of output, but those same devices must also be capable of reproducing musical tones without listeners noticing or complaining. Both speakers and microphones should be chosen based on reputation, not necessarily on cost.

Professional installation can help ensure that there are no inadvertent electrical errors that may violate local codes, or that may cause inductive humming noises. The process also includes properly concealing all the wires and connections, and making sure that any hanging speakers are not a safety hazard. Most consultants will also train designated church members in electronic control panel operations during services.




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