The purpose of the 3D-Audio/ANR solution is to offer the following capabilities and operational benefits: Digital ICS/ANR; Digital Intercom; Digital Interphone Amplifier, increases speech intelligibility; Active Noise Reduction (ANR) and Electrical Noise Reduction (ENR); Reduces hearing loss, stress and fatigue while at the same time eliminating the need for earplugs; Directional radio channel separation –Fixed Directions; Improved speech intelligibility and reduced workload due to spatial separation of radio channels; and 3D-Audio. Improved situational awareness, improved survivability, reduced workload and response times in relation to threats detected by sensor systems (e.g. RWR, MWS) Current upgrades to F-16s provide Secure-Line-Of-Sight (SLOS) and Beyond-Line-Of-Sight (BLOS) communications through the installation of a second ARC-210 radio. The ARC-210 modification provides an improved ability to securely communicate with ground forces and Command and Control (C2) nodes, but does not allow simultaneous operations on SLOS/BLOS frequencies. Homeland Defense (HD) and combat theater operations require simultaneous SLOS/BLOS communications to concurrently maintain contact with both C2 and friendly forces. A second ARC-210 permits growth to extended data and image transfer when linked to an advanced display. The combination of two ARC-210s plus a legacy radio (three radios total) allows in-theater communications on a C2 frequency, a secure tactical frequency with ground forces, and an intra-flight frequency.