Audio Feedback
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Details
Audio feedback is a special kind of feedback which occurs when a sound loop exists between an audio input (for example, a microphone or guitar pickup) and an audio output (for example, a loudspeaker). In this example, a signal received by the microphone is amplified and passed out of the loudspeaker. The sound from the loudspeaker can then be received by the microphone again, amplified further, and then passed out through the loudspeaker again. This is a good example of positive feedback. The frequency of the resulting sound is determined by resonant frequencies in the microphone, amplifier, and loudspeaker, the acoustics of the room, the directional pick-up and emission patterns of the microphone and loudspeaker, and the distance between them. More specifically, the conditions for feedback follow the Barkhausen stability criterion, namely that, with sufficiently high gain, a stable oscillation can (and usually will) occur in a feedback loop whose frequency is such that the phase delay is an integer multiple of 360 degrees and the gain at that frequency is equal to 1.
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GarantieWeitere Informationen
- Allgemeine Informationen
- GTIN 09786130664763
- Genre Technik
- Editor Frederic P. Miller, Agnes F. Vandome, John McBrewster
- Anzahl Seiten 104
- Herausgeber Alphascript Publishing
- EAN 9786130664763
- Format Fachbuch
- Titel Audio Feedback
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