- N -

Near Field - The area up to one foot from the sound source.

Noise - 1) A random energy that contains energy at all audio frequencies. 2) Any unintentional or objectionable signal added to an audio signal.

Noise Filter - A filter used which passes only signals with the intended audio frequencies thus eliminating noise signals at other frequencies.

Noise Floor - The level of the noise, in dB, below the signal.

Noise Gate - A gate used to turn off an audio channel when noise but not signal is present.

Noise Reduction - Any device to remove noise in a device or system.

Non-Directional - Used with microphones to mean the same thing as the term Omni-Directional (picking up from all directions).

Non-Destructive Editing - The action in Digital Disk Audio Recording, where the playback of the digital audio is programmed to play certain portions and not others.

Notch - A narrow band of audio frequencies.

Notch Filter - A device that rejects signals that have frequencies within a narrow band of audio frequencies and passes all other signals.