3D Audio is useful when multiple audio sources are present while using COM1 or COM2. By using different responses in each ear, 3D audio processing creates spatial separation from each audio source, aiding in the distinction of which audio source the pilot is hearing.

Because this feature uses different signals for left and right channels, it requires wiring for stereo intercom and stereo headsets. If an aircraft is not wired to support stereo headsets, or the crew does not use stereo headsets, then COMs audio will be distributed to both ears regardless of the 3D audio functionality selection.

With a single COM selected and 3D Audio enabled, the listener hears the audio source at the 12 o’clock position. If both COMs are selected, the listener hears COM1 at 11 o’clock and COM2 at the 1 o’clock position.

The scope of 3D Audio is limited to COM audio and Intercom audio for pilot and copilot stations. All other audio (alerts, sidetones, etc.) will be distributed equally to both ears.

COM and Intercom 3D audio can be enabled or disabled individually.