When it comes to sound, an event doesn’t have to involve thousands of people and require a PA system capable of handling the band KISS (which achieved the dubious honor of world’s officially measured loudest performance by a band in July 2009). It can be something as simple as a speaker and microphone for a group of 30 people. If you’re wondering why you need a microphone for an audience of 30, this article is for you.
We’re all ears
When you or your speaker are presenting to an audience, it’s critical that every member of the audience can hear and clearly understand the message that’s being delivered. Even when you only have 30 attendees, you’d be surprised at how many external factors can keep an attendee from understanding what’s being said at the front of the room. How often do you hear banquet staff clearing tables, a conversation outside the room or passing vehicle traffic? Typically these things aren’t noticeable-until you’re concentrating on hearing the presenter. You’d be amazed how loud the smallest noise can sound in a quiet room of focused individuals.
The physics of sound
When someone is speaking to a room full of attendees, they typically face the audience. What happens when they turn their head to glance at the projection screen during their talk? That’s right, the audience can no longer hear them, as the sound source (the presenter’s mouth) is pointing away from the bodies in the room. As the speaker glances from left to right during their presentation, the folks on the other side of the room suffer from the Doppler effect. Imagine what you would hear if a car drove back and forth in front of you while you stand still. That’s Doppler shift.
Be sure you’re heard
The easiest way to alleviate most of these sound problems is to put a microphone on the presenter. A headset microphone works best, as it moves the same direction as the head wearing the mic. Second best is a lavalier/lapel microphone, although you may experience the same Doppler effect sound issues when the presenter turns their head while addressing the audience. A handheld microphone is least desirable, unless your presenter is experienced and knows proper microphone technique. Follow these guidelines, even if you have a small group of people, and your presentation/event will have a greater chance of success.
Most meeting professionals are already well versed in the steps necessary to secure their event location, timelines, catering and so forth. What they often aren’t sure about are the technical aspects and the gear and skills necessary to make their event a success. Consult with a trained sound professional when you’re planning your meeting or event, and give them plenty of lead time so you’re not caught at the last minute with unpleasant surprises that impede your attendees’ ability to hear what you or your presenter have to say.
Jim Brumbach is the technical director at Technisch Creative, an award-winning event management and production company based in East Lansing. He has a degree in audio engineering and has been a “sound guy” for nearly 20 years.
