Editing Limiter (section)

=== In aerospace and military ===
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For military two-way radio sets and aircraft VHF voice telecommunications, the voice limiter is known as a [[vogad]]. It is designed to work with high levels of background noise near the microphone. One form operates by up-converting the audio signal to an ultrasonic frequency, hard limiting that signal, and
then down converting the result. The frequency conversion uses image-cancelling heterodyning. The advantage of clipping the supersonic signal is that the odd harmonics
produced will still be out-of-band when down converted. This is in contrast to standard hard limiting, as in an electric guitar fuzz box, where the harmonics are highly audible. This device ultimately gives a distinctive character to the voice communication, which despite being highly distorted, ensures spoken words remain clear.