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2. Active noise control - Wikipedia

   en.wikipedia.org/wiki/Active_noise_control

   Active noise control ( ANC ), also known as noise cancellation ( NC ), or active noise reduction ( ANR ), is a method for reducing unwanted sound by the addition of a second sound specifically designed to cancel the first. The concept was first developed in the late 1930s; later developmental work that began in the 1950s eventually resulted in commercial airline headsets with the technology ...

3. Noise reduction - Wikipedia

   en.wikipedia.org/wiki/Noise_reduction

   Noise reduction is the process of removing noise from a signal. Noise reduction techniques exist for audio and images. Noise reduction algorithms may distort the signal to some degree. Noise rejection is the ability of a circuit to isolate an undesired signal component from the desired signal component, as with common-mode rejection ratio .

4. Compression artifact - Wikipedia

   en.wikipedia.org/wiki/Compression_artifact

   Compression artifact. A compression artifact (or artefact) is a noticeable distortion of media (including images, audio, and video) caused by the application of lossy compression. Lossy data compression involves discarding some of the media's data so that it becomes small enough to be stored within the desired disk space or transmitted ...

5. Noise (signal processing) - Wikipedia

   en.wikipedia.org/wiki/Noise_(signal_processing)

   Noise (audio), such as "hiss" or "hum", in audio signals. Background noise, due to spurious sounds during signal capture. Comfort noise, added to voice communications to fill silent gaps. Electromagnetically induced noise, audible noise due to electromagnetic vibrations in systems involving electromagnetic fields.

6. Remove or temporarily hide ads in AOL Mail - AOL Help

   help.aol.com/articles/ad-free-aol-mail

   A new ad appears if you refresh the page or perform some actions. • Most Ads - Click the "X" or Options icon and Dislike this ad to remove that specific ad and provide feedback. • The right-side ad - Click "X" and then Stop seeing this ad to temporarily hide the ad. Ad blockers insert code to block ads, which can negatively impact email ...

7. Image noise - Wikipedia

   en.wikipedia.org/wiki/Image_noise

   Image noise is random variation of brightness or color information in images, and is usually an aspect of electronic noise. It can be produced by the image sensor and circuitry of a scanner or digital camera. Image noise can also originate in film grain and in the unavoidable shot noise of an ideal photon detector. Image noise is an undesirable by-product of image capture that obscures the ...

8. Audio restoration - Wikipedia

   en.wikipedia.org/wiki/Audio_restoration

   Often audio engineers and sound editors use DAWs to manually remove "pops and ticks" from recordings, and the latest spectrographic 'retouching' techniques allow for the suppression or removal of discrete unwanted sounds. DAWs are capable of removing the smallest of anomalies, often without leaving artifacts and other evidence of their removal.

9. Adaptive noise cancelling - Wikipedia

   en.wikipedia.org/wiki/Adaptive_noise_cancelling

   Active noise control is a method in acoustics to reduce unwanted sound in physical spaces and an area of research that preceded the development of adaptive noise cancelling. The term noise is used here with its common meaning of unwanted audible sound.