noise removal; noise rejection
Technical term in computing and signal processing for eliminating unwanted noise from a signal or data. The gloss 'normal mode rejection' is a specific engineering usage.
This software has a noise removal function.
Applying a noise rejection filter makes the audio clearer.
ノイズ除去 is a more common, slightly less technical synonym often used in audio and image processing. 雑音除去 is more formal and may appear in engineering specifications.
Compound of 雑音 (noise) and 除去 (removal). The exact historical derivation is uncertain; the spelling is conventionally associated with the meaning.