How do professional theaters protect body mics from sweat and moisture?
These methods were provided by James Savage, head of audio for the Chicago Shakespeare Theater.
Wrap a layer of moleskin around the microphone body; be certain to not cover acoustical openings on the microphone. The moleskin will absorb moisture. The moleskin must be replaced on a regular basis as it will become saturated.
Moleskin is sold with an adhesive backing for medical use. The manufacturer is CURAD.
Miniature rubber "O" ring:
A miniature microphone is often positioned on the head, grill facing downward toward the mouth, cable running upward over the head. Place an "O"ring on the microphone body to act as a "drip off point." Sweat will travel down the cable, onto the microphone body, and drip off the "O" ring. The cable can be secured to the actor's hair, or to a wig, using toupee clips.
Toupee clips are sold by wig supply companies: http://www.headcovers.com/toupee-clips-medium/
"Socking" a miniature microphone:
- Purchase nylon panty hose of a color that will match the actor's skin or costume.
- Cut the panty hose to create large squares of nylon.
- Create a square wooden frame, then stretch the nylon fabric on the frame and fasten it using staples.
- Spray the stretched nylon with 3M Scotch-Gard Fabric Protector- available at a hardware store.
- Once dry, remove the nylon from the wooden frame. Cut into small squares that are large enough to cover the body mic.
- Place the nylon square over the body mic. The nylon should not be pulled taut, but should form-fit to the mic's outline.
- Keep the nylon in place by sewing the fabric square together near/around the mic cable.
As the nylon pores fill up with sweat and moisture, the high frequency response of the mic will deteriorate. Replace the nylon square with a new one when the mic sounds "dull."