The folks at NASA, who have studied sound frequencies longer than I've been alive, have produced this easy-to-read (a lot of easy to understand pictures) pdf ebook on "Vibration Control Principles."  It's all good information.  Pay particular attention to pages 52 and 54-58.  You can grab it here.

A little vocal EQ goes a long way to providing a better sound.  Here are five little tips you can use the next time you are behind the mixer.  read more »

Headphones, In Ear Monitors (IEM's), Earbuds, it doesn't matter what you call them, the odds are they are used at some point during the church worship time.  They might be used by the sound board operator.  They might be used by worship team members.  They might be very dangerous!  read more »

Sound is what you hear. I hope you aren't satisfied with that answer. A sound engineer needs to understand not only what they hear, but what happens with sound.

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