Saturday, July 19, 2014

Good Church Sound System Design Gets The Message Across Clearly

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 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 congregations, the addition of acoustic panels or thick carpet may eliminate echo entirely, while others fight heavy reverberation. People sitting in the front pews may hear the speaker adequately, but those a few rows back may miss most sentences. Inadequate microphones often provide good spoken vocal clarity, but cannot begin to handle the demands of amplified bass, drums or keyboards.

Although some members attempt to fix the problem on their own, acoustical fine tuning often requires the help of a professional analyst and designer. Even though most congregations are self-funded, the final cost of a newly-designed audio configuration is only one of the factors critical to choosing a new acoustic setup. Without determining the real causes of problems, spending on speakers or microphones may be wasted.

An experienced consultant begins an analysis by critically listening with both electronic devices and well-trained human ears. Most analysts employ specialized audio software designed to accurately outline the acoustical shape of a room, along with the problem areas where sound will either echo or disappear. This process helps to achieve a comfortable dynamic listening range for every single seat in the pews.

Many rooms require more than one speaker, and that can create regions where there are acoustic hot or cold spots. When properly balanced and timed, those spaces are eliminated, providing clean signals to every single location. Calibration may be difficult to achieve without the proper equipment, but an experienced consulting and installation firm takes the guesswork out of optimization.

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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