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How does a speech processor affect a single sideband phone signal?

  1. It decreases voice fidelity

  2. It increases average power

  3. It modulates the signal

  4. It converts amplitude to frequency

The correct answer is: It increases average power

A speech processor enhances the performance of a single sideband (SSB) phone signal primarily by increasing the average power output of the transmission. This is achieved through various techniques that manipulate the audio input before it is transmitted, which allows for a more efficient use of the available transmitting power. In SSB communication, the modulation process does not inherently provide a strong signal unless carefully managed. The speech processor typically compresses the dynamic range of the audio signal, which means it emphasizes the louder parts and reduces the quieter ones. By doing this, the average power of the signal increases, allowing it to occupy more bandwidth effectively and making it more intelligible at longer distances. Increasing average power is particularly advantageous for overcoming the noise floor and other interference present in the communication environment, thus leading to better signal clarity and reception.