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SYNTHESIZER Frequency synthesizer, an electronic circuit capable of generating multiple frequencies from a single crystal oscillator. SYSTEM Applied to measurements, means the best value that the system can determine.
Many busier airports now use a more automated system that uses a speech synthesizer, also known as TTS (Text To Speech) Software. With this system, a computer voice speaks the message.
See also: Statute mile, Wind, Pilot, Navigation, Air traffic
 
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