Audio and Sound Honor

The Pathfinder Audio and Sound honor teaches the path the preacher's voice and the music take to reach the person sitting in the pew: microphone, cable, mixing console and speaker. Those who earn it learn to open the right channel at the right moment and to look after the congregation's hearing.

The complete Audio and Sound honor requirements are in the catalog (code AM-045, listed there as the Sound Engineering honor; in Brazil it is called Sonoplastia) and are summarized here, with no answer key. The knowledge behind them comes from Shure and Yamaha publications, Brazil's NR-15 labor standard and the World Health Organization (WHO), checked on October 6, 2026.

🎚️What is the Audio and Sound honor and what are the requirements?

The Audio and Sound honor has the code AM-045, belongs to the Missionary and Community Activities area and sits at difficulty level 2. According to the catalog, it was created in 2012 by the South American Division (SAD) of the Seventh-day Adventist Church, and it stands alongside the other outreach and service honors.

Of the 13 requirements, most call for knowledge (number 4 already with your church's mixer in front of you) and two call for practice over a set time: running the mixer for at least two programs and assisting the church sound team for three months. It suits Pathfinders who like technology, music or behind-the-scenes work and want to serve the church without going up on the platform.

Summary of the Desbravai catalog (AM-045), with no answers.

⛪What is church sound and what does a church sound engineer do?

The Michaelis dictionary, a Portuguese dictionary, defines sonoplastia (the honor's name in Brazil) as the art and technique of creating, selecting and using sound resources (noises, effects, music, jingles) in shows, films, radio and television. In church, the word took on a practical meaning: the work of whoever looks after the sound of the service, from the pulpit microphone to the background music for the children's story.

A good sound engineer works so that nobody notices the work: when something fails, everyone turns to look at the mixer. Watch an experienced operator and you will see the qualities the job needs. They arrive early, test every microphone, pay attention until the last minute, accept guidance and never use the mixer to show off.

The worship service schedule is the most important tool. With it, the sound engineer knows when to open the mic for the person who will pray, when to have the backing track for the special music ready and when to bring up the video; without it, every reaction comes late. The Investiture ceremony script already includes a copy for the sound team.

Paul used sound as an image of clarity: "For if the trumpet makes an uncertain sound, who will prepare for battle?" (1 Corinthians 14:8, NKJV). Whoever studies the mixer and follows the script makes sure the message arrives whole.

🎤What are the most common types of microphones?

According to Shure's guide Microphone Techniques for Live Sound Reinforcement, the two most common types are dynamic and condenser. In a dynamic mic, sound moves a diaphragm attached to a coil inside a magnet's field. It is simple, rugged and almost impossible to overload with a loud voice, which is why it is the type most used in live sound.

The condenser captures more detail, but it has electronic circuitry and needs power: from a battery or from phantom power, which the mixer sends down the same XLR cable. Shure cites 12 to 48 volts, and the Yamaha MG10XU supplies 48 V. That mixer's manual says to leave phantom power off when it is not needed and never to connect or disconnect cables while it is on.

The pickup pattern matters too. A cardioid hears best from the front, covers about 130 degrees and picks up only one third of the ambient sound an omnidirectional mic would, which helps against feedback. Very close to the mouth it boosts the bass: that is the proximity effect.

Types listed by Shure; uses and precautions are practical guidance.

🔌What are the types of audio cables and what is each one for?

According to Shure, a balanced cable carries the signal on two conductors with opposite polarity, plus the shield; noise picked up along the way arrives equally on both, and the mixer's balanced input rejects it. In an unbalanced cable, the signal travels on a single conductor, and the noise rides along all the way to the speaker.

In Shure's guide, a low-impedance microphone works with cables of 300 meters or more without loss, while a high-impedance one loses treble beyond about 6 meters. The multicable snake bundles many channels in a single jacket and connects the stage box to the mixer, instead of dozens of loose cables.

Shure, Yamaha MG10XU manual and Brazilian naming (P10 and P2).

🎛️How does a mixer work: gain, EQ, compressor and monitor?

The mixer receives the signals, adjusts the level and tone of each one, blends them and sends the result to the speakers, the monitors and the headphones. Every model has its own layout, and requirement 4 asks about your church's mixer; the table uses the Yamaha MG10XU manual as an example, a 10-channel mixer (it is only a reference, not a buying recommendation).

Equalization is tone control: it shapes the frequency response by boosting or cutting bands. When a voice does not sound clear, the Yamaha manual suggests switching on the high-pass filter, lowering the bass and raising the treble. The equalizer in requirement 3 is the device, or the mixer function, that makes this tone adjustment.

The compressor reduces the part of the signal that goes over a limit (threshold) by the chosen proportion (ratio). At 4:1, every 4 dB above the threshold come out as 1 dB, as Apple's technical documentation explains. That way, the preacher who whispers and then exclaims sounds more even.

The monitor is the speaker facing the people on the platform, fed by the mix from the AUX knobs. Headphones serve the operator, who can listen without disturbing the church. When powering up, keep the speakers at minimum, turn on microphones and devices, then the mixer and the speakers last; to power down, reverse the order.

Controls and values: Yamaha MG10XU manual (they vary from mixer to mixer). Common mistakes: practical guidance.

🔁How do you prevent microphone feedback and control reverberation?

Feedback is the squeal that happens when sound from the speaker goes back into the microphone and is amplified again, according to Shure's glossary. To get more volume before the squeal, the manufacturer gives four rules: microphone close to the talker, microphone away from the speakers, speakers close to the audience and the fewest possible open microphones.

Under the inverse square law, each time the distance to the source doubles, the level drops 6 dB: a preacher who steps back from 30 to 60 centimeters takes 6 dB of margin away from the system. Each time the number of open microphones doubles, another 3 dB are lost. A cardioid is least sensitive directly behind it, so the monitor goes behind the mic; with a supercardioid, Shure says to move the monitor about 55 degrees off to the side.

Reverberation is the sum of many reflections that keep sound in the room after the source has stopped (Shure); the HyperPhysics site, from Georgia State University, measures it by the time the sound takes to fall 60 dB. The more absorption, the less reverberation: carpet and acoustic ceiling tiles soak up the treble, curtains and upholstered seats reach the bass, and a clothed audience absorbs mids and treble. The operator helps by keeping mics close to the mouth, the volume moderate and the reverb effect light.

📡What causes wireless microphone interference?

Shure lists as common failures a weak battery, transmitter and receiver set to different bands, a faulty receiver cable, a frequency unsuitable for the area and electronic devices less than about 1.5 meters from the receiver, such as computers and Wi-Fi routers.

The human body, made largely of water, absorbs radio energy: wrapping a hand around the external antenna of a handheld mic can cut effective power by 50% or more, and bending the antenna of the lavalier's bodypack transmitter also weakens the signal. Receiver antennas should be in plain sight, above the audience, with no metal or walls in between.

Frequencies should avoid the TV channels active in the area and be compatible with one another. Take the batteries out after each use and keep a wired mic ready on the next channel.

🦻How do you protect hearing and earn the honor in practice?

The sound engineer controls the volume that reaches every ear in the church, children's included, and noise damage cannot be undone (see how the ear and hearing work). Regulatory Standard 15 (NR-15), from Brazil's Ministry of Labor and Employment, is a Brazilian labor standard: it sets how long a worker may be exposed to each noise level. It is not a limit for a worship audience, but the table shows how fast the tolerated time drops as the sound goes up.

For events with amplified music, the health reference is the World Health Organization (WHO) global standard from 2022: a cap of 100 decibels averaged over 15 minutes, monitored live with calibrated equipment. When most of the audience are children, the cap drops to no more than 94 dB (90 dB or less for young children), and the document notes that a level well below that suits many events.

The Yamaha MG10XU precautions leaflet, published in several languages, lists care that applies to any sound equipment: keep the power cord where nobody can step on it or trip over it, no cups on the equipment, never handle the plug with wet hands, unplug the unit during electrical storms and switch it off if the cord is damaged. It also warns that headphones at high volume for a long time can cause hearing loss. Outlets, extension cords and the breaker panel stay with a qualified adult.

For requirements 12 and 13, agree on stages with the church sound engineer (watching, looking after cables, operating with them beside you) and log the date and program in a notebook. In your Unit, show with the instructor, at low volume, how mic position changes the point where feedback starts. Common beginner mistakes: gain too high and a channel left open with nobody talking.

Next, pair this honor with Music or move on to the Audio and Sound - Advanced honor. See who can teach and sign off honors and check the complete Audio and Sound honor requirements in the catalog.

NR-15, Annex 1 (excerpt of the table; Brazilian labor standard). Above 115 dB(A), exposure without adequate protection is not allowed.