Which of the following is an example of dropping the sound levels for background music, to focus the audio on an important voice-over announcement?

Ducking is a technique used in audio processing where the volume of background music is automatically reduced whenever a voice-over or important announcement is present. This allows the key audio to take precedence, ensuring that the important content is clear and easily understood. The process typically involves using a compressor that responds to the level of the voice-over, momentarily lowering the background music's volume when it detects the presence of the voice signal, thus enhancing the listener's focus on the announcement.

In contrast, feedback refers to the loud and often shrill sound created when a microphone picks up sound from a speaker, equalization adjusts specific frequency ranges within audio signals, and compression reduces the dynamic range of an audio signal to make quieter sounds louder and louder sounds quieter. None of these processes serve the specific purpose of managing background music levels in the manner that ducking does during announcements.