NAD 3020
The NAD 3020 is a stereo integrated amplifier by NAD Electronics, it is an important component in the history of high fidelity audio…
Nager acrofacial dysostosis
Nager acrofacial dysostosis, also known as Nager syndrome, is a genetic disorder which displays several or all of the following…
Nagra
Nagra is a Swiss brand of portable audio recorders first introduced in 1951. In 1997, the company expanded into new markets by launching a…
Naim NAIT
The Naim NAIT (acronym for "Naim Audio Integrated amplifier") is an integrated amplifier from the British hi-fi manufacturer, Naim Audio…
Nakamichi Dragon
The Nakamichi Dragon is an audio cassette deck that was introduced by Nakamichi in 1982 and marketed until 1994. The Dragon was the first…
Napkin ring cylinder
A napkin ring cylinder is a format of phonograph cylinder manufactured and marketed by the Columbia Phonograph Company in 1904 and 1905. …
Nashville tuning
Nashville tuning (also high-strung or high-string guitar) is the practice of replacing the heavy lower strings of a guitar with lighter…
National Audio-Visual Conservation Center
The National Audio-Visual Conservation Center (NAVCC) is a branch of the Library of Congress devoted to preserving the United States'…
National Day of Listening
The National Day of Listening is an unofficial day of observance where Americans are encouraged to set aside time to record the stories of…
National Recording Preservation Plan
The National Recording Preservation Plan is a strategic guide for the preservation of sound recordings in the United States.
National Recording Registry
The National Recording Registry is a list of sound recordings that "are culturally, historically, or aesthetically significant, and inform…
Natural (music)
In modern Western music notation, a natural (♮) is a symbol that cancels a previous sharp or flat in the written music. It indicates that…
Natural sounds
Natural sounds are any sounds produced by non-human organisms as well as those generated by natural, non-biological sources within their…
Nature Manifesto
Nature Manifesto is an Immersive sound piece and multimedia installation by Icelandic artist Björk and artist and curator Aleph Molinari…
Neapolitan scale
In music, the major Neapolitan scale and the minor Neapolitan scale are two musical scales. Both scales are minor, in that they both…
Neodymium magnet
A neodymium magnet (also known as NdFeB, NIB or Neo magnet) is a permanent magnet made from an alloy of neodymium, iron, and boron that…
Network loudspeaker
A conventional loudspeaker is an electromechanical transducer that converts an electrical signal into sound. If locally powered, this can…
Neural encoding of sound
The neural encoding of sound is the representation of auditory sensation and perception in the nervous system. The complexities of…
Neuromonics
Neuromonics is a non-invasive sound therapy used to manage tinnitus. The therapy involves a customized acoustic stimulus delivered through…
Neuromuscular ultrasound
Neuromuscular ultrasound refers to a field in medicine in which ultrasound is used to diagnose and guide treatment for people with…
Neutral sixth
A neutral sixth is a musical interval wider than a minor sixth but narrower than a major sixth. Three distinct intervals may be termed…
Neve 80 Series
The Neve 80 Series are a series of hand-wired analogue mixing consoles designed and manufactured from 1968 to 1979 by Neve Electronics…
NHK Science & Technology Research Laboratories
NHK Science & Technology Research Laboratories (STRL, Japanese: NHK放送技術研究所, romanized: NHK Hōsō Gijutsu Kenkyūjo), headquartered in…
NICAM
Near Instantaneous Companded Audio Multiplex (NICAM) is an early form of lossy compression for digital audio. It was originally developed…
Night flying restrictions
Night flying restrictions or night-time curfews, including night flight bans, are any regulations or legislation imposed by a governing…
Nikko TRM-800
The TRM-800 was a high-end solid state integrated stereo amplifier made in Japan, using NEC power transistors, by Nikko.
No Aircraft Noise
No Aircraft Noise (NAN), sometimes referred to as the No Aircraft Noise Party and officially registered as The Common Cause – No Aircraft…
Noble Silence
Noble Silence is a term attributed to the Gautama Buddha, for his reported responses to certain questions about reality. One such instance…
NOC (whale)
NOC was a beluga whale who made human-like vocalizations. He was captured by Inuit hunters for the United States Navy in 1977 and lived in…
Node (physics)
A node is a point along a standing wave where the wave has minimum amplitude. For instance, in a vibrating guitar string, the ends of the…
Nodern Loves You
Nodern Loves You is a full-length music album arranged and recorded by artist and filmmaker Mitch Stratten (performing under the stage…
Noise
Noise is sound, chiefly unwanted, unintentional, or harmful sound considered unpleasant, loud, or disruptive to mental or hearing faculties.
Noise (spectral phenomenon)
Noise is any type of random, troublesome, problematic, or unwanted signals.
Noise Abatement Society
The Noise Abatement Society is a UK company with the charitable aims of raising awareness of, and finding solutions to, noise pollution.
Noise barrier
A noise barrier (also called a soundwall, noise wall, sound berm, sound barrier, or acoustical barrier) is an exterior structure designed…
Noise Control Act
The Noise Pollution and Abatement Act of 1972 is a statute of the United States initiating a federal program of regulating noise pollution…
Noise curve
Noise curves are a common way to characterise background noise in unoccupied buildings and spaces. Their purpose is to produce a…
Noise dosimeter
A noise dosimeter (American English) or noise dosemeter (British English) is a specialized sound level meter intended specifically to…
Noise Emission by Equipment Used Outdoors Directive
The Noise Emission by Equipment Used Outdoors Directive 2000/14/EC, adopted in 2000, is a directive from the European Union that regulates…
Noise figure
Noise figure (NF) and noise factor (F) are figures of merit that indicate degradation of the signal-to-noise ratio (SNR) that is caused by…
Noise Free America
Noise Free America is a national, non-profit organization aimed at reducing noise pollution in the community. The organization's main…
Noise gate
A noise gate or simply gate is an electronic device or software that is used to control the volume of an audio signal.
Noise in music
In music, "noise" has been variously described as unpitched, indeterminate, uncontrolled, convoluted, unmelodic, loud, otherwise…
Noise measurement
In acoustics, noise measurement can be for the purpose of measuring environmental noise or measuring noise in the workplace. Applications…
Noise pollution
Noise pollution is sound with potential harmful effects on humans and animals. The main sources of outdoor noise worldwide are machines…
Noise print
A noise print is part of a technique used in noise reduction. A noise print is commonly used in audio mastering to help reduce the effects…
Noise reduction
Noise reduction is the process of removing noise from a signal. Noise reduction techniques exist for audio and images. Noise reduction…
Noise reduction coefficient
The noise reduction coefficient (commonly abbreviated NRC) is a single-number rating intended to describe the average sound absorption…
Noise regulation
Noise regulation includes statutes or guidelines relating to sound transmission established by national, state or provincial and municipal…
Noise shaping
In signal processing, noise shaping is a technique typically used when processing digital audio, image, and video signals. It is usually…
Noise spectral density
In communications, noise spectral density (NSD), noise power density, noise power spectral density, or simply noise density (N0) is the…
Noise weighting
A noise weighting is a specific amplitude-vs.-frequency characteristic that is designed to allow subjectively valid measurement of noise…
Noise, vibration, and harshness
Noise, vibration, and harshness (NVH), also known as noise and vibration (N&V), is the study and modification of the noise and vibration…
Noise-induced hearing loss
Noise-induced hearing loss (NIHL) is a hearing impairment resulting from exposure to loud sound. People may have a loss of perception of a…
Noisemaker
A noisemaker is something intended to make a loud noise, usually for fun. They are popular with children as toy musical instruments. They…
Noisy data
Noisy data are data that are corrupted, distorted, or have a low signal-to-noise ratio. Improper procedures (or improperly documented…
Nominal impedance
Nominal impedance in electrical engineering and audio engineering refers to the approximate designed impedance of an electrical circuit or…
Nominal level
Nominal level is the operating level at which an electronic signal processing device is designed to operate. The electronic circuits that…
Nominal watt
Nominal wattage is used to simplify the measurement of the efficiency of a loudspeaker.
Nonlinear acoustics
Nonlinear acoustics (NLA) is a branch of physics and acoustics dealing with sound waves of sufficiently large amplitudes.
Nonsyndromic deafness
Nonsyndromic deafness is hearing loss that is not associated with other signs and symptoms. In contrast, syndromic deafness involves…
Noonan syndrome
Noonan syndrome (NS) is a genetic disorder that may present with mildly unusual facial features, short height, congenital heart disease…
Noonan syndrome with multiple lentigines
Noonan syndrome with multiple lentigines (NSML) which is part of a group called Ras/MAPK pathway syndromes, is a rare autosomal dominant…
Nora (cat)
Nora the Piano Cat (September 10, 2004 – February 5, 2024) was a gray tabby cat, rescued from the streets of Camden, New Jersey, by the…
Normalized frequency (signal processing)
In digital signal processing (DSP), a normalized frequency is a ratio of a variable frequency (
Northern lights chord
In music, the Northern Lights chord is an eleven-note chord from Ernst Krenek's Cantata for Wartime (1943), that represents the Northern…
Northrop F-5
The Northrop F-5 is a family of supersonic light fighter aircraft initially designed as a privately funded project in the late 1950s by…
NOS stereo technique
The Nederlandse Omroep Stichting (NOS) stereo technique is a method of capturing stereo sound.
Nuclear acoustic resonance
Nuclear acoustic resonance is a phenomenon closely related to nuclear magnetic resonance. It involves utilizing ultrasound and ultrasonic…
Numerical sight-singing
Numerical sight-singing, an alternative to the solfege system of sight-singing, is a musical notation system that numbers the diatonic…
Nyepi
Nyepi (Balinese: ᬜᬾᬧᬶ), also known as Day of Silence, is a Balinese holiday held every Isakawarsa ("new year") according to the Balinese…