3:1 Rule Microphone Placement Spacer

Enter the distance from a microphone to its source, and this gives you the minimum distance any other open mic should be kept away, following the classic 3:1 rule. Keeping to this spacing keeps comb filtering between multiple open mics low enough to stay inaudible — handy when placing a stage full of mics on a panel, choir, or drum kit.

Distance: source to primary mic (m) Calculate