AV Tips

The modern church or house of worship is necessarily moving to embrace new technology, whether that means improving sound reinforcement or implementing professional-quality broadcasts. One of the features increasingly being used and discussed is video cameras, but, according to a recent AVNetwork blog post, camera installations are often poorly implemented due to a lack of strategic vision.

Background noise is crucial to any sound system. Research shows that intelligibility is a function of the ratio of speech to background noise, with background noise defined as the sound level from air conditioning, fluorescent lights, equipment cooling fans, and perhaps traffic, voices and other noises originating outside the room. It also includes the sounds of people within a room, whether they’re speaking among themselves, rustling papers, walking in and out, and so on.

There’s a lot of theory that goes into screen sizing for large-screen displays, but it all boils down to one or two simple formulas.

Given the font sizes used in a typical PowerPoint presentation, the height of the screen should equal the distance to the farthest viewer divided by six. That is, H = D/6.

With hymn lyrics, where the font sizes are a little larger than PowerPoint slides, we often use H = D/8 or sometimes H = D/10.

In a small room with a simple layout, the speaker design may be fairly straightforward, but when additional factors are introduced, such as reaching the space under or above a balcony, speaker placement can become more complicated. Delay speakers (also called ancillary delay speakers) provide rooms with more thorough sound coverage, leveling the acoustics of a space and ideally improving the overall listening experience.

Just as the leader of a house of worship is supposed to have a vision for what will happen during a service, the sound mixer should have a clear idea of how audio will be integrated into the event. According to Behind the Mixer blogger Chris Huff, establishing a vision for the sound mix of a worship service is essential for success.

By working with the worship leader, Huff suggested, sound mixers can make sure they are focusing on the right tone in their mix.

Advancements in audio visual technology are being announced constantly, but, while these changes may be exciting, they can also be discouraging for the system administrator trying to keep a facility’s resources up to date. Experts recommend using a process called Technology Lifecycle Management (TLM) to handle IT equipment upgrades in a smart fashion, and a recent AV Network article explained how to apply the process to AV gear as well.


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