In electronics, noise is a random fluctuation in an electrical signal, a characteristic of all electronic circuits. Noise generated by electronic devices varies greatly, as it can be produced by several different effects. Thermal noise is unavoidable at non-zero temperature (see fluctuation-dissipation theorem), while other types depend mostly on device type (such as shot noise, which needs steep potential barrier) or manufacturing quality and semiconductor defects, such as conductance fluctuations, including 1/f noise.

In communication systems, the noise is an error or undesired random disturbance of a useful information signal, introduced before or after the detector and decoder. The noise is a summation of unwanted or disturbing energy from natural and sometimes man-made sources. Noise is, however, typically distinguished from interference, (e.g. cross-talk, deliberate jamming or other unwanted electromagnetic interference from specific transmitters), for example in the signal-to-noise ratio (SNR), signal-to-interference ratio (SIR) and signal-to-noise plus interference ratio (SNIR) measures. Noise is also typically distinguished from distortion, which is an unwanted alteration of the signal waveform, for example in the signal-to-noise and distortion ratio (SINAD). In a carrier-modulated passband analog communication system, a certain carrier-to-noise ratio (CNR) at the radio receiver input would result in a certain signal-to-noise ratio in the detected message signal. In a digital communications system, a certain E_b/N₀ (normalized signal-to-noise ratio) would result in a certain bit error rate (BER).

Peter Brian Gabriel (born 13 February 1950) is an English singer, musician, and songwriter who rose to fame as the lead vocalist and flautist of the progressive rock group Genesis. After leaving Genesis, Gabriel went on to a successful solo career. His 1986 album, So, is his most commercially successful, and the album's biggest hit, "Sledgehammer", won a record nine MTV Awards at the 1987 MTV Video Music Awards, and the song is the most played music video in the history of the station.

More recently, Gabriel has focused on producing and promoting world music and pioneering digital distribution methods for music. He has also been involved in various humanitarian efforts. Gabriel has won numerous music awards throughout his career, including three Brit Awards—winning Best British Male in 1987, six Grammy Awards, thirteen MTV Video Music Awards, and in 2007 he was honoured as a BMI Icon at the 57th annual BMI London Awards for his “influence on generations of music makers.” Gabriel was also awarded the Polar Music Prize in 2009, and was inducted into the Rock and Roll Hall of Fame as a member of Genesis in 2010.

Nathaniel Read "Nate" Silver (born January 13, 1978) is an American statistician, psephologist, and writer. Silver first gained public recognition for developing PECOTA, a system for forecasting the performance and career development of Major League Baseball players, which he sold to and then managed for Baseball Prospectus from 2003 to 2009.

In 2007, writing under the pseudonym "Poblano," Silver began to publish analyses and predictions related to the 2008 United States presidential election. At first this work appeared on the political blog Daily Kos, but in March 2008 Silver established his own website, FiveThirtyEight.com. By summer of that year, after he revealed his identity to his readers, he began to appear as an electoral and political analyst in national print, online, and cable news media.

The accuracy of his November 2008 presidential election predictions—he correctly predicted the winner of 49 of the 50 states—won Silver further attention and commendation. The only state he missed was Indiana, which went for Barack Obama by 0.9%. He also correctly predicted the winner of all 35 Senate races that year.

Nusrat Fateh Ali Khan (Punjabi: نصرت فتح علی خان (Shahmukhī)) (October 13, 1948 – August 16, 1997), a world-renowned Pakistani musician, was primarily a singer of Qawwali, the devotional music of the Sufis (a mystical tradition within Islam). Considered one of the greatest singers ever recorded, he possessed a six-octave vocal range^{[citation needed]} and could perform at a high level of intensity for several hours. Extending the 600-year old Qawwali tradition of his family, Khan is widely credited with introducing Sufi music to international audiences. He was popularly known as "Shahenshah-e-Qawwali", meaning "The King of Kings of Qawwali".

Born in Faisalabad, Pakistan, Khan had his first public performance at age of 16, at his father's chelum. He officially became the head of the family qawwali party in 1971, and was signed by Oriental Star Agencies (OSA), Birmingham, U.K., in the early 1980s. In subsequent years, Khan released movie scores and albums for various labels in Pakistan, Europe, Japan and the U.S. He engaged in collaborations and experiments with Western artists, becoming a well-known world music artist in the process. He toured extensively, performing in over 40 countries.

Asian Dub Foundation are a British electronica band that plays a mix of rapcore, dub, dancehall and ragga, also using rock instruments, acknowledging a punk influence. Their distinctive sound also combines indo-dub basslines, searing sitar-inspired guitars and ‘traditional’ sounds, shot through with fast-chat conscious lyrics.

Asian Dub Foundation is better described as a group that arose from a community rap organisation. The different forms of music include toasting, dub, funky guitars and many other African instrumentals. One of their most influential tracks is named Strong Culture which gives the listener an idea of the Asian culture. "Their distinctive sound is a combination of hard ragga-jungle rhythms, indo-dub basslines, searing sitar-inspired guitars and 'traditional' sounds gleaned from their parents' record collections, shot through with fast-chat conscious lyrics".

Sanjay Gulabhai Tailor, Aka Sun-J, joined the band as live midi/programmer and DJ soon after. This completed the full live line-up of the band. After earning a reputation as formidable live performers, the band — which now included dancer Bubble-E — won widespread acclaim for the 1995 single "Rebel Warrior". Their second album Rafi's Revenge was nominated for a Mercury Prize combining a unique combination of punk energy with a jungle/reggae core. The single, 'Naxalite' was an ode to the militant Naxalite movement in India. Tours to the United States with the Beastie Boys and Japan followed to wide acclaim.^{[citation needed]} Their following album, Community Music, developed their sound further and received a coveted 10/10 review in NME.