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Characteristic combination of sound emissons
The term acoustic signature is used to describe a combination of acoustic emissions of sound emitters, such as those of ships and submarines. In addition
Acoustic_signature
Ship which uses stealth technology to reduce risk of detection
and acoustic signatures. Stealth ships designs can borrow from stealth aircraft technology, although some aspects such as wake and acoustic signature reduction
Stealth_ship
2023 maritime disaster
informed by the United States Navy's (USN) sonar detection of an acoustic signature consistent with an implosion around the time communications with the
Titan_submersible_implosion
Damping unwanted vibrations of machinery
Sound refraction: Just as a submarine can use refraction to hide its acoustic signature from surface vessels, the same principle of sound refraction can be
Acoustic_quieting
Underwater sound detected in 1997 from a non-tectonic cryoseism (ice quake)
mechanism could explain the Bloop's wide detection range and distinct acoustic signature. As oceanographer Yunbo Xie explains, the alteration of waveforms
Bloop
Topics referred to by the same term
materials with atypical properties Acoustic signature, sound emitters, such as those of ships and submarines Acoustic thermometry, observation of ocean
Acoustic
MASINT (measurement and signature intelligence). This uses broadband and narrowband analysis of acquired acoustic signatures from surface ships and submarines
Acoustical_intelligence
Naval testbed funded by the U.S. Navy's Office of Naval Research
with the goals of providing increased propulsive efficiency, reduced acoustic signature, and improved maneuverability over previous Destroyer Class combatants
Sea_Jet
Topics referred to by the same term
label Time signature, indicating how many beats are in each measure Acoustic signature, a combination of acoustic emissions Isotopic signature, a characteristic
Signature_(disambiguation)
American sonar decoy
purpose of MOSS was to create multiple targets all with the same acoustic signature. MOSS was originally developed by Gould until Westinghouse acquired
Mobile_submarine_simulator
Submarine that can launch ballistic missiles
kilometres (miles) from their targets, and acoustic quieting makes them difficult to detect (see acoustic signature), thus making them a survivable deterrent
Ballistic_missile_submarine
Radiated noise reduction system fitted to some western warships
designed to prevent the classification or identification of a warship's acoustic signature by another vessel, i.e. by a hostile submarine. Instead of hearing
Prairie-Masker
Nuclear powered ballistic missile submarine built for Russian Navy
times lower than that of the U.S. Virginia-class submarines. The acoustic signature of Borei is significantly stealthier than that of the previous generations
Borei-class_submarine
electric guitar and the acoustic guitar in music from the mid-20th century has led to various instrument manufacturers producing signature models that are endorsed
List of signature model guitars
List_of_signature_model_guitars
Reducing the noise caused by helicopters
enemy to an incoming helicopter in time to re-orient defenses (see acoustic signature). The noise from a rotor can be divided into several distinct sources
Helicopter_noise_reduction
refer to more modern machines. Abbingdon Music Research Acoustic Research Acoustic Signature Akai Alphason AnalogueWorks Audio-Technica Junxi Technology
List of phonograph manufacturers
List_of_phonograph_manufacturers
Reconnaissance UAV
electro-optical/infrared sensor with a unique warhead that, due to its low acoustic signature, "is not detected until two seconds before it starts its kill dive"
Aeronautics_Defense_Orbiter
Swiftsure-class nuclear-powered fleet submarine of the Royal Navy
for her mission to acquire the acoustic signature of the Soviet aircraft carrier Kiev. Upon locating a new unique acoustic sound that indicated the Kiev's
HMS_Swiftsure_(S126)
Nuclear-powered cruise-missile submarine
government had failed to include a requirement to minimize the submarine's acoustic signature which meant that K-222 was easily detectable at high speed. The Soviet
Soviet_submarine_K-222
American defense technology company
an unmanned aerial vehicle. The name signals its reportedly quiet acoustic signature and ability to avoid detection. Ghosts 1, 2, and 3 have been used
Anduril_Industries
Russian diesel electric patrol submarines
aimed to produce an improved version of the Project 636 with better acoustic signature, new combat systems and possibly air-independent propulsion. However
Lada-class_submarine
Search for a missing Boeing 777 in the southern Indian Ocean
recordings from the IMOS and found a clear acoustic signature just after 01:30 UTC on 8 March. This signature was also found, but difficult to discern from
Search for Malaysia Airlines Flight 370
Search_for_Malaysia_Airlines_Flight_370
American manufacturer and importer of string instruments
hand. Used primarily with the Nuno Bettencourt signature models, the SEC has also been employed with acoustic guitars, and remains on some current (2017)
Washburn_Guitars
Visual representation of the spectrum of frequencies of a signal as it varies with time
classification of respiration states based on a neural network model. Acoustic signature Chromagram Fourier analysis for computing periodicity in evenly spaced
Spectrogram
Class of missile boats for the United Arab Emirates
claimed to reduce their radar cross section (RCS) and infrared and acoustic signatures. The Falaj 3 class is based on the Fearless-class patrol vessel currently
Falaj_3-class_patrol_boat
System for detecting submarines
passive sonar systems designed to detect the acoustic signature of submarines such as SOSUS. Non-acoustic systems can work on a variety of different physical
Submarine_detection_system
Meter used to measure water current velocities
An acoustic doppler current profiler (ADCP) is a hydroacoustic current meter similar to a sonar, used to measure water current velocities over a depth
Acoustic Doppler current profiler
Acoustic_Doppler_current_profiler
A signature song is the one song (or, in some cases, one of a few songs) that a popular and well-established recording artist or band is most closely
List of English signature songs
List_of_English_signature_songs
Future class of US Navy nuclear ballistic missile submarines
imaging, weapons control etc. In a bid to reduce life-cycle cost and acoustic signature, Columbia is to run on electric drive—that is, it will use an electric
Columbia-class_submarine
Naval warfare tactics and countermeasures
take advantage of acoustic shadows (regions of which sound waves tend to curve around), and conceal the vehicle's acoustic signature against nearby surfaces
Torpedo_defense
Chinese attack submarine class
considerable advancement in Chinese sonar sensor technology and stealth acoustic signature reductions. The third-generation Type 041 submarine was first identified
Type_041_submarine
Circular throwing weapon from the Indian subcontinent
disrupting the airflow over the airfoil shape also creates a distinctive acoustic signature during flight, often described as a loud "whooshing" sound. In terms
Chakram
Military technology to make personnel and material less visible
harmonics. Using varied spacing between the blades spreads the noise or acoustic signature of the rotor over a greater range of frequencies. The simplest technology
Stealth_technology
1983 class of British attack submarines
However some improvements over the Swiftsure class included its reduced acoustic signature, which was due to the hull being covered in anechoic tiles which were
Trafalgar-class_submarine
Iranian-designed one-way attack drone
forces introduced a system of networked microphones to track the acoustic signature of incoming drones. Some 10,000 microphones are believed to be a part
HESA_Shahed_136
graphite and fiberglass composites, and has a low radar, infrared, and acoustic signature. It is powered by a 28 kW (38 hp) Wankel-rotary engine from AV Engines
Aurora_Goldeneye
Study of sound recording evidence usage in court
material in analysis. Main article: Acoustic signature An audio recording is usually a combination of multiple acoustic signals, such as: direct sources
Audio_forensics
Technical branch of intelligence gathering
Measurement and signature intelligence (MASINT) is an intelligence discipline that uses scientific and technical analysis of data from sensing instruments
Measurement and signature intelligence
Measurement_and_signature_intelligence
Arihant-class nuclear submarine
the one that powers INS Arihant. The CLWR has exceptionally lower acoustic signature than the previous generation making it harder to detect by enemy vessels
INS_Aridhaman
National submarine program of Turkey
for extended periods without snorkeling, significantly reducing its acoustic signature and vulnerability to detection. The indigenous AIP solution is reported
Atılay-class_submarine_(2025)
Guitar owned by Willie Nelson
components from the Baldwin guitar. He opted to amplify the acoustic guitar, resulting in his signature sound. As Nelson was an RCA Records artist, several guitar
Trigger_(guitar)
operational gaps in surface ship and submarine maneuverability and acoustic signature. Quiet Electric Drives, or QEDs, are quiet, efficient and power dense
Quiet_Electric_Drive
Howling caused by a circular path in an audio system
(also known as acoustic feedback, howlround in the UK, or simply as feedback) is a positive feedback situation that may occur when an acoustic path exists
Audio_feedback
Nuclear-powered attack submarine class
anticipated that the Type 095 submarine will have a substantially reduced acoustic signature, within an improved hull design. Compared to the Type 093, the Type
Type_095_submarine
Acoustic positioning devices
array emitted acoustic signatures that were captured by the GIBs and transmitted up to the orbiting aircraft. Post-mission the GPS and acoustic data from
GPS_sonobuoy
Indian main battle tank
main engine is off. The use of an APU reduces the IR/thermal and acoustic signature and enhances the tank's ambush attack capability. The Arjun Mk1A has
Arjun_(tank)
Main battle tank
turned off to save fuel and reduce the tank's thermal emissions and acoustic signature. The tank was modernised locally at "Terem - Khan Krum" EOOD in Targovishte
T-72_operators_and_variants
Unmanned aerial vehicle designed for direct impact strikes
driving a pusher propeller. This gives them a distinctively loud acoustic signature, often compared to a "moped" or "lawnmower." Jet-powered one-way attack
One-way_attack_drone
System that detects and conveys the location of gunfire or other weapon fire
l’Armement (DGA) – the French defence procurement agency – studied the acoustic signature of submarines. The DGA & Section Technique de l’Armée de Terre (STAT)
Gunfire_locator
Revolver
during the Vietnam War. No sights were fitted.[citation needed] The acoustic signature of QSPR rounds was around 110 dB (similar to a traditionally silenced
OTs-38 Stechkin silent revolver
OTs-38_Stechkin_silent_revolver
American rock musician and songwriter (born 1972)
released an extremely limited run of acoustic signature guitars. Epiphone has release lower-priced version of his signature Gibson Les Paul Junior in 2022.
Billie_Joe_Armstrong
1968 UK–USSR nuclear submarine collision
submarine HMS Warspite detected an acoustic signature of a Soviet submarine. The onboard library of acoustic signatures positively identified the submarine
Submarine incident off Kola Peninsula (1968)
Submarine_incident_off_Kola_Peninsula_(1968)
Submarine of the United States
life-cycle cost of the submarine while at the same time reducing acoustic signature. In 2014, Northrop Grumman was chosen as the prime designer and manufacturer
USS_District_of_Columbia
Nuclear-powered, nuclear-armed UUV
is the special design of the pump-jet for clearance of the drone's acoustic signature to imitate the noise of civil ships. A U.S. intelligence officer told
Poseidon (unmanned underwater vehicle)
Poseidon_(unmanned_underwater_vehicle)
German World War II submarine
which was developed by the Kriegsmarine for reducing a submarines' acoustic signature. This development project was codenamed Alberich after the invisible
German_submarine_U-11_(1935)
Regional jet airliner family
the International Civil Aviation Organization; the relatively low acoustic signature has enabled the E-Jet to be operated from airports that have imposed
Embraer_E-Jet_family
Sonar-reducing and sound-altering tiles
reducing the submarines' acoustic signatures. Modern Russian tiles are about 100 mm thick, and apparently reduced the acoustic signature of Akula-class submarines
Anechoic_tile
Arihant-class nuclear submarine
the one that powers INS Arihant. The CLWR has exceptionally lower acoustic signature than the previous generation making it harder to detect by enemy vessels
INS_Arisudan
Class of Turkish aircraft carriers under construction
optimisation processes aimed at achieving improved efficiency and reduced acoustic signature. Seakeeping analysis indicates that the vessel is designed to support
MUGEM
Aircraft carrier of the Indian Navy
ship to take photographs and dropped sonobuoys to record the ship's acoustic signature. The aircraft left the area when a Russian MiG-29 fighter arrived
INS_Vikramaditya
Proprietary marine propulsion system
grounding and provides another blocking location during drydocking. A low acoustic signature favours the device's use in minesweepers by minimising cavitation
Voith_Schneider_Propeller
Classification of fighter aircraft c. 1970–2000
technologies also seek to decrease the infrared signature, visual signature, and acoustic signature of the aircraft. In the modern-day, the KF-21 Boramae
Fourth-generation_fighter
Operating mode of submarines
also acoustically decoupled from the hull, as they employed belt transmission rather than direct coupling to the propeller shaft. Acoustic signature – Characteristic
Silent_running_(submarine)
System of hydrophones
source, but also to identify the type of ship by the distinctive, acoustic signature of its machinery noises. For this, the relative positions of the hydrophones
Towed_array_sonar
Multi-role helicopter family by AgustaWestland
improves aerodynamic efficiency at the blade tip and reduces the acoustic signature.[page needed] Improved BERP IV rotors have since been developed; when
AgustaWestland_AW101
Division of the U.S. Naval Surface Warfare Center
in magnetic detection and electromagnetic signature testing related to mine warfare. Southeast Alaska Acoustic Measurement Facility (SEAFAC), Ketchikan
Carderock Division of the Naval Surface Warfare Center
Carderock_Division_of_the_Naval_Surface_Warfare_Center
Reconnaissance vehicle
even in the harshest environments, while reducing the vehicle's acoustic signature. Two troops from B Squadron, Blues and Royals served in the Falklands
FV107_Scimitar
Stealth missile destroyer class of the US Navy
"50 times harder to spot on radar than an ordinary destroyer." The acoustic signature is comparable to that of the Los Angeles-class submarines. Water sleeting
Zumwalt-class_destroyer
Designated marksman rifle
may make identifying enemy snipers more difficult. Likewise, its acoustic signature is similar to an AKM. Iraq: Main producer and user since 1978. Zastava
Tabuk_Sniper_Rifle
French general purpose stealth frigates
environment. The magnetic signature is reduced by the presence of a demagnetisation belt.[citation needed] The acoustic signature is minimized by mounting
La_Fayette-class_frigate
American business jet
approximately a 5 to 1 bypass ratio for improved fuel efficiency and low acoustic signature. The unit also incorporates the Honeywell GTCP36-150CX Auxiliary Power
Cessna_Citation_X
Device that enables detection and tracking of animals
Acoustic tags, also known as acoustic transmitters, are small sound-emitting devices that allow the detection and/or remote tracking of organisms in aquatic
Acoustic_tag
1984 thriller novel by Tom Clancy
initially believing it to be an American Ohio-class. Based on its acoustic signature, Tupolev realizes that it is Red October, and gives the order to attack
The_Hunt_for_Red_October
Condensed digital summary generated from an audio signal
broadcast monitoring, acoustic fingerprints should also be insensitive to analog transmission artifacts. Generating a signature from the audio is essential
Acoustic_fingerprint
German submunition delivery system
classified as an anti-aircraft mine, has an acoustic sensor which triggers the mine when the right acoustic signature is detected. Height: 126 mm Diameter:
MW-1
Acoustic sensing method
may be used as a means of acoustic location and of measurement of the echo characteristics of "targets" in the water. Acoustic location in air was used
Sonar
Concept relating to waves and signals
students and the hobbyist. The acoustic spectrogram generated by the spectrum analyzer provides an acoustic signature of the musical note. In addition
Spectrum_(physical_sciences)
technicalities behind acoustic recognition. They found that chicks could identify their parents based on an acoustic signature specific to the pattern
Cognitive ecology of individual recognition in colonial birds
Cognitive_ecology_of_individual_recognition_in_colonial_birds
Soundscape of a given location or space
sonic space and normally occupies a separate track in the sound edit. Acoustic signature Ambient noise level Environmental noise Filmmaking Presence (sound
Ambience_(sound_recording)
Chinese attack helicopter
with swept tips, designed to reduce the blade length, vibration, and acoustic signature. The tail rotor consists of two sets of dual composite blades (four
Changhe_Z-10
Arrangement of marine propulsion systems that generators generate electricity
engines, acoustical decoupling of the engines from the hull, which makes the ship less noisy, and a reduction in weight and volume. Reducing acoustic signature
Integrated electric propulsion
Integrated_electric_propulsion
Japanese guitar brand
Vai Signature JS – Joe Satriani Signature PGM – Paul Gilbert Signature APEX – Munky Signature E-Gen – Herman Li Signature NDM4 – Noodles Signature PWM
Ibanez
Technique used to measure temperatures and currents over large regions of the ocean
Ocean acoustic tomography is a technique used to measure temperatures and currents over large regions of the ocean. On ocean basin scales, this technique
Ocean_acoustic_tomography
European attack helicopter
includes stealth; aspects such as the visual, radar, infrared and acoustic signatures have been minimised to better evade threats that may be present upon
Eurocopter_Tiger
2022 EP by Elizabeth Fraser and Damon Reece
Sun's Signature is a collaborative extended play by Scottish musician Elizabeth Fraser and British percussionist Damon Reece. It was released on June
Sun's_Signature
American guitarist and composer (born 1954)
Best known for his electric guitar skills, Johnson is also a player of acoustic, lap steel, and resonator guitar, as well as a bassist, pianist, and vocalist
Eric_Johnson_(guitarist)
Weapon for use in waters, triggered by the target's approach
magnetic signature, and Voith-Schneider propellers, to limit the acoustic signature. They are built with hulls that produce a minimal pressure signature. These
Naval_mine
American musical instrument maker
Breedlove Guitars is an American acoustic instrument company based in Bend, Oregon. Breedlove produces acoustic guitars, acoustic bass guitars, and ukuleles
Breedlove_Guitars
Mine-Resistant Ambush Protected Vehicle (MRAP)
Reset work also adds Engineering Change Proposals (ECPs) that include acoustic signature reduction (muffler), Modular Ammunition Restraint System (MARS) ammunition
Oshkosh_M-ATV
Attack helicopter prototype (1996–2004)
stated to be 360 times smaller than that of the AH-64 Apache. The acoustic signature of the helicopter was also reported to be noticeably lower than that
Boeing–Sikorsky RAH-66 Comanche
Boeing–Sikorsky_RAH-66_Comanche
German armored fighting vehicle
(left) are routed to the rear of the vehicle to reduce its thermal and acoustic signature. Final drives are mounted in the front and the toothless idler sprockets
Lynx (Rheinmetall armoured fighting vehicle)
Lynx_(Rheinmetall_armoured_fighting_vehicle)
Class of submarine
travel over 8,000 nautical miles. Scorpene Evolved boasts a reduced acoustic signature and can sustain its maximum speed for extended periods, distinguishing
Scorpène-class_submarine
Procurement project for Canadian Navy
polar-class cold-weather conditions. The platform shall have a low acoustic signature consistent with modern SSK design standards (radiated noise ≤ 110
Canadian_Patrol_Submarine
Fast attack craft class of the Finnish Navy
directed underwater to minimize the thermal signature, or up in the air to minimize the underwater acoustic signature. 50 nozzles around the decks and upper
Hamina-class_missile_boat
US dry cargo and ammunition ship
successfully completed an acoustic trial off San Clemente Island and demonstrated that NIXIE was capable of masking the ships acoustic signature "Fact File: Dry
Lewis and Clark-class dry cargo ship
Lewis_and_Clark-class_dry_cargo_ship
1963 scout helicopter
(Hughes Airport) and at Area 51 in 1971. In order to reduce their acoustic signature, the helicopters (N351X and N352X) received a four-blade 'scissors'
Hughes_OH-6_Cayuse
Propulsion system for vehicles
pressure hull, protecting the submarine from detection by reducing its acoustic signature when surfaced. Some nuclear submarines also use a similar turbo–electric
Diesel–electric_powertrain
List of musicians notable for using Gibson guitars
Armstrong Signature Les Paul Junior models (one double cutaway, and one single cutaway) as well as a very limited run of signature acoustic guitars. Chet
List_of_Gibson_players
American musician (born 1975)
Cells". The album's first single, "Seven Nation Army", became the band's signature song, reaching number one on the Billboard Modern Rock Tracks chart for
Jack_White
Type of aircraft
RQ-7 Shadow with a drone that was runway independent, had a lower acoustic signature and had lower equipment requirements to transport. The Army awarded
AeroVironment_T-20
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