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Sounding reference signal
The sounding reference signal (SRS) is an uplink pilot signal a user equipment transmits so the base station can measure the radio channel in LTE and 5G NR.
Sounding rocket
A sounding rocket, or research rocket, is a small instrument-carrying rocket that flies a suborbital parabolic path to take scientific measurements in space or the upper atmosphere.
Sounding rocket payload instrumentation
Sounding rocket payload instrumentation is the recoverable, instrumented package flown above the atmosphere on suborbital research rockets, carrying experiments for astronomy and microgravity research with telemetry, attitude control, and parachute recovery systems.
Sounding the Seventh Trumpet
Sounding the Seventh Trumpet, also shortened to Seventh Trumpet, is Avenged Sevenfold's 2001 metalcore debut album on Good Life Recordings: 13 tracks, 52 minutes, raw production, with 'Warmness on the Soul' as its piano ballad.
Soundness
Soundness (logical soundness) is the property of a proof system that proves only what is semantically valid: derivable conclusions hold in every model of the premises.
Soundness and completeness
Soundness and completeness are the properties linking a formal proof system to its semantics: what is provable is valid, and what is valid is provable.
SoundOn
SoundOn is a music distribution and marketing platform owned by TikTok and ByteDance, launched in 2022, which lets independent artists upload to TikTok and streaming services while keeping ownership of their recordings.
Soundproofing
Soundproofing, also called sound insulation, is the set of materials and techniques used in building construction to reduce the transmission of sound between spaces or from outdoors.
Soundrenaline
Soundrenaline is an Indonesian rock and alternative music festival first held in Jakarta in 2002, later based in Bali and known for crowds above 100,000.
Sounds Good Feels Good
Sounds Good Feels Good is the second studio album by Australian pop-punk band 5 Seconds of Summer (2015, Capitol), produced by John Feldmann; it debuted at number one on the Billboard 200, UK, and ARIA charts, scoring 67 on Metacritic.
Sounds of a Cowhide Drum
Sounds of a Cowhide Drum is the 1971 first poetry collection by South African poet Oswald Mbuyiseni Mtshali, recording black life under apartheid and winning the Olive Schreiner Prize.
Sounds of Silence
Sounds of Silence is Simon & Garfunkel's second studio album, released by Columbia January 17, 1966. Built around the Tom Wilson-overdubbed electric folk-rock hit single "The Sounds of Silence", a #1 in January 1966.
SOUNDS study
SOUNDS (NCT04661631, Surgery and Lung Ultrasound in COVID-19 Infection) was a Colombian diagnostic accuracy study of lung ultrasound screening for SARS-CoV-2 in 203 urgent surgery patients; sensitivity 52.9%, specificity 91% at score >8, judged not useful for screening.
Soundscape
A soundscape is the acoustic environment as perceived and understood by people in context, treating sound as a resource to design rather than noise to reduce.
Soundstorm
Soundstorm, also known as MDLBEAST Soundstorm, is a large annual music festival in Riyadh, Saudi Arabia, held since 2019 and drawing hundreds of thousands of visitors.
SoundStream
SoundStream is a neural audio codec from Google Research, described in 2021, that compresses speech, music, and general audio with one network, outperforming Opus at a quarter of its bitrate.
SoundThinking, Inc.
SoundThinking, Inc., formerly ShotSpotter, is an American public safety technology company founded in 1996, known for its ShotSpotter acoustic gunshot detection system used by police in about 170 cities.
Soundtrack
Soundtrack: the recorded audio of a film, TV show, or game, and the album derived from it; term dates to the talkie era (The Jazz Singer, 1929), spanning photoplay albums, orchestral scoring, and pop-song licensing.
Soundtrack (2019 TV series)
Soundtrack (originally Mixtape) is a 2019 Netflix musical drama created by Joshua Safran, in which Los Angeles characters lip-sync to pop songs; 10 episodes released December 18, 2019, canceled January 31, 2020.
Soundtrack #1 (사운드트랙 #1)
Soundtrack #1 (사운드트랙 #1), also called Why did You Come to My House, is a 2022 four-episode Disney+ Korean romance drama directed by Kim Hee-won, starring Park Hyung-sik and Han So-hee as 20-year friends turned lovers, with OST-driven storytelling and a 2023 sequel, Soundtrack #2.
Soundtrack 2
Soundtrack #2 (사운드트랙 #2) is a 2023 Disney+ Korean romance miniseries, second in the Soundtrack anthology, starring Keum Sae-rok and Noh Sang-hyun as ex-lovers reunited through piano lessons; six episodes aired December 6–20, 2023.
Soundtrack album
Soundtrack album: a commercial album of music from or tied to a film, TV series, or video game; also called OST. Ranges from original score albums to song compilations; Saturday Night Fever sold 30 million copies.
Soundtrack to a Coup d'Etat
Soundtrack to a Coup d'Etat (Bande-son pour un coup d'Etat) is Johan Grimonprez's 2024 archival documentary, 150 minutes, on the 1960 Congo Crisis, Patrice Lumumba's 1961 assassination, and jazz used as CIA-backed diplomacy; Sundance Special Jury Award winner and 2025 Oscar nominee.
Soundwave (Australian music festival)
Soundwave (Australian music festival), also called Gravity Soundwave, was AJ Maddah's annual rock, metal and punk touring festival held in Australian capital cities from 2004 to 2015, peaking at $63 million revenue in 2013 before collapsing with A$26 million in debts.
Soundwave (Transformers)
Soundwave is the Decepticon Communications Officer in Transformers, a microcassette-recorder robot voiced by Frank Welker since 1984, who deploys cassette minions such as Laserbeak and Ravage and serves as Megatron's loyal intelligence chief.
Sounion (Attica: settlement and deme)
Sounion (Σούνιον), a coastal deme of tribe Leontis at Attica's southernmost cape, 69 km from Athens; fortified 413/412 BC, cult of Poseidon and Athena, harbor dues, silver-mining territory, Macedonian garrison 295–228 BC.
Sounwave
Sounwave (Mark Anthony Spears) is a Compton-born record producer, TDE in-house producer and Digi+Phonics member, Kendrick Lamar's main collaborator since 2009, a six-time Grammy winner, and 2026 Producer of the Year nominee for GNX.
Souo S2000
The Souo S2000 is a luxury touring motorcycle from Souo Motorcycle, Great Wall Motor's brand, and the first with a flat-eight engine, launched in 2024.
Soup
Soup: a primarily liquid food of meat, vegetables, or grains in stock, juice, or water, served warm or cold. Covers clear and thick types (broth, bisque, chowder, cream, purée), etymology, and the soup origin of the word restaurant.
Soup kitchen
A soup kitchen, also called a meal center, is a charitable or public institution serving free ready-to-eat meals, traditionally soup with bread, to needy people, widespread since the 1700s.