Saturday, July 12, 2014

Good Church Sound System Design Keeps The Message In Focus

By Marylou Forbes


Most congregations meet in buildings ranging from cathedral-inspired traditional houses of worship, to small re-purposed store-fronts in malls. Although a congregation is more than the location where it assembles, the acoustics of those rooms determine whether worshipers enjoy and understand both message and music. Excellent church sound system design ensures that listeners will be involved and interested, rather than simply trying to hear.

Most people have experienced discomfort in rooms having problems with amplification, and understand how elaborate amplification setups may eliminate some problems, but can make others worse. The volume may be fine in one area, but ear-shattering across the room. Voices might be loud, but impossible to clearly understand. Podium speakers may seem far away or disembodied, or else obscured by embarrassing, ear-shattering feedback.

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.

Members may try to correct those problems themselves, but fine tuning a room or equipment to a achieve the necessary balance for good live reproduction may require professional acoustic analysis. Although most congregations have limited budgets, equipment costs are only one factor in choosing and developing a new audio setup. In some cases, simply spending a great deal on speakers or microphones is not cost-effective.

Good analysis relies on digital electronics for critical measurements, and the human ear for final judgments. Every room has its own unique acoustical footprint, and that can be determined best using specialized audio reference software. Spots that encourage echo or that swallow certain frequencies can be eliminated, creating a dynamic range that is not only aesthetically pleasing, but which is also universally audible.

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.

Because church services usually emphasize both music and the spoken word, a new design must be able to handle both. Speech requires microphones that are able to accurately clarify what is being said, and they should also be able to seamlessly switch from words to music without volume issues or noticeable distortion. While cost is always an important consideration, choosing speakers based on price alone can be disappointing.

After finalizing the equipment choices and room design, professional installation avoids code-breaking electrical errors, while eliminating inductive noise sources. Other important requirements include concealment of intrusive connections and wiring, and making sure that heavy, hanging speakers are safely anchored. After installation, most firms also train selected church members in audio control panel operations.




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