Radio frequency interference (RFI) occurs when unwanted radio signals disrupt the normal operation of electronic devices. This interference can come from various sources, such as cell phones, Wi-Fi networks, or even microwave ovens. RFI can cause issues like static in audio devices or poor performance in wireless communications. RFI is particularly problematic in sensitive equipment, such as medical devices or aviation systems, where clear signals are crucial. To mitigate RFI, engineers often use shielding techniques or filters to reduce the impact of these unwanted signals, ensuring that devices function correctly and safely.