Adaptive noise cancelling

Signal processing technique to reduce noise

Adaptive noise cancelling is a signal processing technique that is highly effective in suppressing additive interference or noise corrupting a received target signal at the main or primary sensor in certain common situations where the interference is known and is accessible but unavoidable and where the target signal and the interference are unrelated, that is, uncorrelated. Examples of such situations include:a microphone attempting to receive speech near machinery or other noise sources in the environment, such as an aircraft cockpit a naval ship towing a sonar array where the ship's own noise masks a much weaker detected target signal obtaining a fetal electrocardiogram (ECG) where the presence of the mother's stronger ECG represents an unavoidable interference.

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