Audio feedback loops occur when a sound loop exists between an audio input and output, creating that familiar high-pitched squeal. The most effective prevention methods begin with proper microphone placement. Always position microphones behind speakers and point them away from monitor wedges to avoid direct sound pickup.

Utilize directional microphones like cardioid patterns that reject sound from the sides and rear. Implement graphic equalizers to identify and reduce specific feedback frequencies through ring-out procedures. Set appropriate gain levels by first bringing up levels until feedback begins, then reducing by 6dB for headroom.

Consider using feedback suppressors or digital signal processors that automatically detect and eliminate feedback frequencies. Physical barriers and acoustic treatment in rooms minimize reflective surfaces that contribute to feedback. Proper speaker placement facing the audience rather than microphones creates additional protection against problematic sound loops.

For monitor systems, employ in-ear monitors instead of wedge monitors to completely eliminate the feedback path. When using floor monitors, position them at a 45-degree angle to microphones and use the minimum number necessary. Regularly maintain equipment as damaged components can increase feedback susceptibility. By implementing these techniques systematically, you can achieve significantly higher volume levels without feedback issues.