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Frage 435

What is a microphonic?

  1. An IC used for amplifying microphone signals
  2. Distortion caused by RF pickup on the microphone cable
  3. Changes in oscillator frequency caused by mechanical vibrationRichtige Antwort
  4. Excess loading of the microphone by an oscillator

Erklärung

A microphonic is a change in circuit behavior produced by mechanical vibration or shock. In an oscillator, vibration moves component parts slightly, varying capacitance or inductance and shifting the output frequency, which is heard as a warble or thump.

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Frage 435: What is a microphonic? · FCC Amateur Extra Class (Element 4) · Questena