![]() ![]() are probably quite different from the non-av sets. Some of the physical design characteristics, such as the pressure exerted on the head pads, etc. Judging from the fact that people have schematics posted on the web on how to adapt aviation headphones for non-aviation use, but not the other way around, I would speculate that even the best non-av sets don't meet the challenges of aviation. 281" TRRS plug for both headset and mic.Īirbus uses a 5-pin XLR connector for both mic and headset. Helicopters and military aircraft use a completely different. The microphones in aviation headsets are separate and use a somewhat aviation-specific. Most commonly the headset itself uses a 1/4" phono plug, wired the same way as older audio headsets with 1/4" plugs. ConnectorsĪviation mics have different physical plugs. There's no way to know if 8-16v would overload it, so you would have to either adapt the phantom power or run it on a battery. ![]() I presume that, since it's made for PC use, it's intended for 5v, but will operate as low as 2v. The headset you listed in the question shows that it requires 2v. The standard voltage from a PC audio card is 5v. I'm unable to find any standard voltage, but it appears the David Clark aviation headsets run on 8-16v. Some aircraft intercoms provide phantom power. They can either contain a battery or run off phantom power, which is a voltage supplied by the device it's plugged into. Phantom powerĮlectret mics require a power source to operate. Too little and it won't open when you speak, too low and it will stay open and you will hear all the aircraft noise. Depending on whether there is a way to adjust the mic input, the level may be too much or too little for the vox system. Aircraft comms use a vox circuit to cut out noise that opens when you speak. ![]() The headset you listed in the question lists 2.2k $\Omega$ which would be work, depending on how much amplification it has. Civilian systems use high-Z, 80-300 $\Omega$ amplified electret mics. Military systems use 5 $\Omega$, low impedance mics. This will make a bigger difference than the headphones. I was always careful to make sure volumes were turned down before I plugged them into the com boxes. I used a set of low-z phones, since I could plug them into a line output and actually hear it. In the recording studio we considered high-Z headsets to be "universal" meaning that you could plug them in anywhere and they would work, but might be limited in volume. There's no real standard, but low-Z are usually less than 32 $\Omega$ And high-Z is usually above 100 $\Omega$. The headphones you listed in the question are 60 $\Omega$, which is somewhat of an in-between. You could run the risk of damaging the headset or your hearing if you have the volume up too far. ![]() A low-Z headset will also be more sensitive, so you would have to turn the volume down. Using a low-Z headset with a high-Z output can cause distortion. Impedance matching is not vital, but can cause some problems with sound quality. Civil aviation uses 300 $\Omega$, high impedance headphones. Military headphones are low impedance, 19 $\Omega$. Impedance is usually referred to in high and low range. But you have to have an adaptor that fixes several compatibility issues. ![]()
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