Audio panel

We’ve gone from one radio and a handheld microphone and speaker to fully integrated panels that enable communications, music, aural alerts, and even adaptive audio.

In the center of this complex ecosystem is the humble audio panel. Like the stereo in a home audio setup, the audio panel is the central point through which all functions pass and is how the pilot controls which radio is transmitting, which is receiving, and what is being received.

Modern audio panels are highly adaptable and are built with the flexibility to handle what is installed in each specific aircraft. In most airplanes you’ll find two communications radios and at least one navigation radio. If the audio panel was built in the past 20 years, it probably has the ability to transmit on one of those radios and listen on another. It likely also has the ability to isolate passenger intercom communications and play music throughout the cabin. Newer models have adaptive audio that will play different frequencies in different ears, making it easier to listen on multiple frequencies at one time. Ditto for the intercom, where different seats in the airplane will come through in discrete earcups.

For all this capability, audio panels look pretty simple. In a retrofit installation, the tech will work with the owner to determine which capabilities are desired, and then will, usually, wire each function into a Sub-D 44-pin connector. Then it’s a matter of plugging it in, sliding the unit into a tray, and testing it.

With all that functionality and adaptability, each airplane is unique and requires time to learn in depth. However, in general, it’s good practice to verify you are transmitting and receiving on the correct radio and that the intercom volume is at a good level. These two simple things solve most radio problems.

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