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Sound pressure

Index Sound pressure

Sound pressure or acoustic pressure is the local pressure deviation from the ambient (average or equilibrium) atmospheric pressure, caused by a sound wave. [1]

181 relations: A-weighting, Absolute threshold, Absolute threshold of hearing, Absorption (acoustics), Acoustic hailing device, Acoustic impedance, Acoustic location, Acoustic reflex, Acoustic transmission, Acoustic wave, Acoustic wave equation, Acoustics, Airbus A320neo family, Ambient noise level, Analog signal, Anti-frogman techniques, Apollo 4, Audification, Audio analyzer, Audio induction loop, Auditory display, Auditory event, Auditory masking, Back-up beeper, Band-pass filter, Bass amplifier, Bearded seal, Biglow Canyon Wind Farm, Biot–Tolstoy–Medwin diffraction model, Bose headphones, Brown note, Byte, Carterfone, Cartilage conduction, Cerwin-Vega, Coaxial loudspeaker, Constant-voltage speaker system, Critical distance, DB drag racing, Decibel, Diffuse field acoustic testing, Direct-field acoustic testing, Discontinued Bose headphones, Dubstep, Electric motorsport, Elephant, Eminent Technology, End correction, Equal-loudness contour, Equations of motion, ..., Equivalent input, Feed-Drum, Field, power, and root-power quantities, Fowlsheugh, Franssen effect, Gain compression, General MIDI, Gunshot, Hawker Siddeley HS.141, Headphones, Hearing level, Hearing range, Home cinema, Horn (acoustic), Horn loudspeaker, Hubert H. Humphrey Metrodome, Hyperacusis, HyperSpike, Immittance, Index of physics articles (S), Infrasound, Inner ear, International System of Quantities, Inverse-square law, ISIRI 13144, ISO 31-7, ISO/IEC 80000, Isobel (disambiguation), Isolation cabinet (guitar), Kerchoonz.com, King Kong (Jibbs song), Larynx, Laser Doppler velocimetry, Level (logarithmic quantity), List of equations in wave theory, List of letters used in mathematics and science, Logarithm, Loudness, Loudspeaker, Loudspeaker enclosure, Loudspeaker measurement, LP, Marine mammals and sonar, Masking threshold, Measurement microphone calibration, Measuring instrument, Metrication in the United States, Microphone, Muffler, Multimeter, MythBusters (2006 season), Naim NAIT, Neper, Noise dosimeter, Noise map, Noise, vibration, and harshness, Nominal watt, NZ Performance Car, Outer ear, Outline of hydrology, Pan law, Particle acceleration, Pascal (unit), Phon, Piet Jeegers, Pile driver, Pitch (music), PMC Ltd., Pre-hospital ultrasound, Pressure, Pressure (disambiguation), Programme level, Propagation loss, Proximity effect (audio), Psychoacoustics, Public address system, Public Warning System (Singapore), Quad Electrostatic Loudspeaker, Quiet PC, Rayl, Reference tone, ReplayGain, Rider (theater), Rocket engine test facility, Rotary woofer, Rubens' tube, Sending loudness rating, Shooting range, Shure SM57, Signal, Silencer (firearms), Smaart, Smiley face curve, Snack Sound Toolkit, Sone, Sonic weapon, Soultone, Sound, Sound annoyance, Sound energy, Sound energy density, Sound exposure, Sound from ultrasound, Sound intensity, Sound intensity probe, Sound level, Sound level meter, Sound power, Speaker grille, Speech interference level, SPL, Stack light, Steam whistle, Subaudible tone, Subwoofer, Tammar wallaby, Threshold of pain, Train horn, Transmission line loudspeaker, Transmission loss, Tube sound, Ultrasonic antifouling, Ultrasound computer tomography, Underwater acoustics, Vocal effort, Wavelength, Weighting filter, Welrod, Woofer, 1883 eruption of Krakatoa, 3D sound reconstruction. Expand index (131 more) »

A-weighting

A-weighting is the most commonly used of a family of curves defined in the International standard IEC 61672:2003 and various national standards relating to the measurement of sound pressure level.

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Absolute threshold

In neuroscience and psychophysics, an absolute threshold was originally defined as the lowest level of a stimulus – light, sound, touch, etc.

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Absolute threshold of hearing

The absolute threshold of hearing (ATH) is the minimum sound level of a pure tone that an average human ear with normal hearing can hear with no other sound present.

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Absorption (acoustics)

Acoustic absorption refers to the process by which a material, structure, or object takes in sound energy when sound waves are encountered, as opposed to reflecting the energy.

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Acoustic hailing device

An acoustic hailing device (AHD) is a specialized loudspeaker that emits high-power sound waves for communicating at a distance.

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Acoustic impedance

Acoustic impedance and specific acoustic impedance are measures of the opposition that a system presents to the acoustic flow resulting of an acoustic pressure applied to the system.

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Acoustic location

Acoustic location is the use of sound to determine the distance and direction of its source or reflector.

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Acoustic reflex

The acoustic reflex (also known as the stapedius reflex, middle-ear-muscles (MEM) reflex, attenuation reflex, or auditory reflex) is an involuntary muscle contraction that occurs in the middle ear in response to high-intensity sound stimuli or when the person starts to vocalize.

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Acoustic transmission

Acoustic transmission is the transmission of sounds through and between materials, including air, wall, and musical instruments.

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Acoustic wave

Acoustic waves (also known as sound waves) are a type of longitudinal waves that propagate by means of adiabatic compression and decompression.

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Acoustic wave equation

In physics, the acoustic wave equation governs the propagation of acoustic waves through a material medium.

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Acoustics

Acoustics is the branch of physics that deals with the study of all mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound.

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Airbus A320neo family

The Airbus A320neo family (neo for new engine option) is a development of the A320 family of narrow-body airliners produced by Airbus, the original family is renamed A320ceo, for current engine option.

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Ambient noise level

In atmospheric sounding and noise pollution, ambient noise level (sometimes called background noise level, reference sound level, or room noise level) is the background sound pressure level at a given location, normally specified as a reference level to study a new intrusive sound source.

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Analog signal

An analog signal is any continuous signal for which the time varying feature (variable) of the signal is a representation of some other time varying quantity, i.e., analogous to another time varying signal.

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Anti-frogman techniques

Anti-frogman techniques are security methods developed to protect watercraft, ports and installations, and other sensitive resources both in or nearby vulnerable waterways from potential threats or intrusions by frogmen or other divers.

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Apollo 4

Apollo 4, (also known as AS-501), was the first unmanned test flight of the Saturn V launch vehicle, which was used by the U.S. Apollo program to send the first astronauts to the Moon.

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Audification

Audification is an auditory display technique for representing a sequence of data values as sound.

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Audio analyzer

An Audio Analyzer is a test and measurement instrument used to objectively quantify the audio performance of electronic and electro-acoustical devices.

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Audio induction loop

Audio induction loop systems, also called audio-frequency induction loops (AFILs) or hearing loops, are an assistive listening technology for individuals with reduced ranges of hearing.

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Auditory display

Auditory display is the use of sound to communicate information from a computer to the user.

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Auditory event

Auditory events describe the subjective perception, when listening to a certain sound situation.

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Auditory masking

Auditory masking occurs when the perception of one sound is affected by the presence of another sound.

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Back-up beeper

A back-up beeper also known as back-up alarm, backup beeper, or vehicle motion alarm, is a device originally intended to warn passers-by of a vehicle moving in reverse.

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Band-pass filter

A band-pass filter, also bandpass filter or BPF, is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range.

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Bass amplifier

A bass amplifier or "bass amp" is a musical instrument electronic device that uses electrical power to make lower-pitched instruments such as the bass guitar or double bass loud enough to be heard by the performers and audience.

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Bearded seal

The bearded seal (Erignathus barbatus), also called the square flipper seal, is a medium-sized pinniped that is found in and near to the Arctic Ocean.

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Biglow Canyon Wind Farm

Biglow Canyon Wind Farm is an electricity generating wind farm facility in Sherman County, Oregon, United States.

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Biot–Tolstoy–Medwin diffraction model

In applied mathematics, the Biot–Tolstoy–Medwin (BTM) diffraction model describes edge diffraction.

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Bose headphones

Bose Corporation produces headphones for consumer, aviation and military use.

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Brown note

The brown note is a hypothetical infrasonic frequency that would cause humans to lose control of their bowels due to resonance.

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Byte

The byte is a unit of digital information that most commonly consists of eight bits, representing a binary number.

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Carterfone

The Carterfone is a device invented by Thomas Carter.

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Cartilage conduction

Cartilage conduction is a pathway in which sound signals are transmitted to the inner ear.

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Cerwin-Vega

Cerwin-Vega is a manufacturing company that produces professional audio components, such as home audio speakers, and car audio components.

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Coaxial loudspeaker

A coaxial loudspeaker is a loudspeaker system in which the individual driver units radiate sound from the same point or axis.

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Constant-voltage speaker system

Constant-voltage speaker systems refer to networks of loudspeakers which are connected to an audio amplifier using step-up and step-down transformers to simplify impedance calculations and to minimize power loss over the speaker cables.

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Critical distance

Critical distance is, in acoustics, the distance at which the sound pressure level of the direct sound D and the reverberant sound R are equal when dealing with a directional source.

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DB drag racing

dB drag racing is a competition rewarding the person who can produce the loudest sound inside a vehicle.

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Decibel

The decibel (symbol: dB) is a unit of measurement used to express the ratio of one value of a physical property to another on a logarithmic scale.

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Diffuse field acoustic testing

Diffuse field acoustic testing is the testing of the mechanical resistance of a spacecraft to the acoustic pressures during launch.

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Direct-field acoustic testing

Direct-field acoustic testing, or DFAT, is a technique used for acoustic testing of aerospace structures by subjecting them to sound waves created by an array of acoustic drivers.

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Discontinued Bose headphones

This is a list of headphone products sold by the Bose Corporation that have been discontinued.

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Dubstep

Dubstep is a genre of electronic dance music that originated in South London in the late 1990s.

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Electric motorsport

Electric motorsport (also known as electric racing or electric motor racing) is a category of motor sport that consists of the racing of electric powered vehicles for competition, either in all-electric series, or in open-series against vehicles with different power trains.

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Elephant

Elephants are large mammals of the family Elephantidae and the order Proboscidea.

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Eminent Technology

Eminent Technology is American audio electronics company based in Florida, established in 1983 by Bruce Thigpen.

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End correction

An acoustic pipe, such as an organ pipe, marimba, or flute resonates at a specific pitch or frequency.

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Equal-loudness contour

An equal-loudness contour is a measure of sound pressure (dB SPL), over the frequency spectrum, for which a listener perceives a constant loudness when presented with pure steady tones.

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Equations of motion

In physics, equations of motion are equations that describe the behavior of a physical system in terms of its motion as a function of time.

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Equivalent input

Equivalent input (also input-referred or input-related), is a method of referring to the signal or noise level at the output of a system as if it were an input to the same system.

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Feed-Drum

The Feed-Drum is an imperial bass drum with a system of electronic conditioning of the skin conceived by composer Michelangelo Lupone and coproduced between CRM - Centro Ricerche Musicali, Rome and Istituto Gramma in L'Aquila.

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Field, power, and root-power quantities

A power quantity is a power or a quantity directly proportional to power, e.g., energy density, acoustic intensity, and luminous intensity.

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Fowlsheugh

Fowlsheugh is a coastal nature reserve in Kincardineshire, northeast Scotland, known for its seventy metre high cliff formations and habitat supporting prolific seabird nesting colonies.

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Franssen effect

The Franssen effect is an auditory illusion where the listener incorrectly localizes a sound.

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Gain compression

Gain compression is a reduction in "differential" or "slope" gain caused by nonlinearity of the transfer function of the amplifying device.

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General MIDI

General MIDI or GM is a standardized specification for electronic musical instruments that respond to MIDI messages.

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Gunshot

A gunshot is a single discharge of a gun, typically a man-portable firearm, producing a visible flash, a powerful and loud shockwave and often chemical gunshot residue.

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Hawker Siddeley HS.141

The Hawker Siddeley HS.141 was a 1970s design study and submission for a British V/STOL airliner requirement.

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Headphones

Headphones (or head-phones in the early days of telephony and radio) are a pair of small loudspeaker drivers worn on or around the head over a user's ears.

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Hearing level

Hearing level is the sound pressure level produced by an audiometer at a specific frequency.

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Hearing range

Hearing range describes the range of frequencies that can be heard by humans or other animals, though it can also refer to the range of levels.

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Home cinema

Home cinema, also called home theater or home theatre, refers to home entertainment audio-visual systems that seek to reproduce a movie theater experience and mood using consumer electronics-grade video and audio equipment that is set up in a room or backyard of a private home.

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Horn (acoustic)

An acoustic horn or waveguide is a tapered sound guide designed to provide an acoustic impedance match between a sound source and free air.

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Horn loudspeaker

A horn loudspeaker is a loudspeaker or loudspeaker element which uses an acoustic horn to increase the overall efficiency of the driving element(s).

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Hubert H. Humphrey Metrodome

The Hubert H. Humphrey Metrodome (commonly called the Metrodome) was a domed sports stadium located in downtown Minneapolis, Minnesota.

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Hyperacusis

Hyperacusis (or hyperacousis) is a debilitating hearing disorder characterized by an increased sensitivity to certain frequencies and volume ranges of sound (a collapsed tolerance to usual environmental sound).

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HyperSpike

HyperSpike is a brand name for acoustic products manufactured by Ultra Electronics – Undersea Sensor Systems Inc.

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Immittance

In electrical engineering and acoustics, immittance is a concept combining the '''im'''pedance and ad'''mittance''' of a system or circuit.

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Index of physics articles (S)

The index of physics articles is split into multiple pages due to its size.

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Infrasound

Infrasound, sometimes referred to as low-frequency sound, is sound that is lower in frequency than 20 Hz or cycles per second, the "normal" limit of human hearing.

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Inner ear

The inner ear (internal ear, auris interna) is the innermost part of the vertebrate ear.

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International System of Quantities

The International System of Quantities (ISQ) is a system based on seven base quantities: length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity.

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Inverse-square law

The inverse-square law, in physics, is any physical law stating that a specified physical quantity or intensity is inversely proportional to the square of the distance from the source of that physical quantity.

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ISIRI 13144

ISIRI 13144 is a standard published by the Institute of Standards and Industrial Research of Iran (ISIRI) in 2011 based on Directive 2009/63/EC.

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ISO 31-7

ISO 31-7 is the part of international standard ISO 31 that defines names and symbols for quantities and units related to acoustics.

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ISO/IEC 80000

ISO 80000 or IEC 80000 is an international standard promulgated jointly by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC).

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Isobel (disambiguation)

Isobel is the Scottish variant of Isabel, a feminine given name.

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Isolation cabinet (guitar)

A guitar speaker isolation cabinet is a sound-proof enclosure that surrounds the speaker and sound-capturing microphone and prevents sound leakage into the outside environment, enabling the amplifier to be turned up without excessive listening volume.

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Kerchoonz.com

Kerchoonz is a social networking website founded in April 2008 and launched live in September 2008 Kerchoonz has been described as "A modern Record Deal" for bands and artists.

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King Kong (Jibbs song)

"King Kong" is the second single from the album Jibbs Featuring Jibbs by American hip hop artist Jibbs.

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Larynx

The larynx, commonly called the voice box, is an organ in the top of the neck of tetrapods involved in breathing, producing sound, and protecting the trachea against food aspiration.

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Laser Doppler velocimetry

Laser Doppler velocimetry (LDV), also known as laser Doppler anemometry (LDA), is the technique of using the Doppler shift in a laser beam to measure the velocity in transparent or semi-transparent fluid flows, or the linear or vibratory motion of opaque, reflecting, surfaces.

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Level (logarithmic quantity)

In the International System of Quantities, the level of a quantity is the logarithm of the ratio of the value of that quantity to a reference value of the same quantity.

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List of equations in wave theory

This article summarizes equations in the theory of waves.

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List of letters used in mathematics and science

Latin and Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities.

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Logarithm

In mathematics, the logarithm is the inverse function to exponentiation.

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Loudness

In acoustics, loudness is the subjective perception of sound pressure.

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Loudspeaker

A loudspeaker (or loud-speaker or speaker) is an electroacoustic transducer; which converts an electrical audio signal into a corresponding sound.

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Loudspeaker enclosure

A loudspeaker enclosure or loudspeaker cabinet is an enclosure (often box-shaped) in which speaker drivers (e.g., loudspeakers and tweeters) and associated electronic hardware, such as crossover circuits and, in some cases, power amplifiers, are mounted.

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Loudspeaker measurement

Loudspeaker measurement is the practice of determining the behavior of loudspeakers by measuring various aspects of performance.

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LP

LP or lp may stand for.

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Marine mammals and sonar

Active sonar, the transmission equipment used on some ships to assist with navigation, is detrimental to the health and livelihood of some marine animals.

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Masking threshold

The masking threshold is the sound pressure level of a sound needed to make the sound audible in the presence of another noise called a "masker".

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Measurement microphone calibration

In order to take a scientific measurement with a microphone, its precise sensitivity must be known (in volts per pascal).

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Measuring instrument

A measuring instrument is a device for measuring a physical quantity.

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Metrication in the United States

Metrication (or metrification) is the process of introducing the International System of Units, also known as SI units or the metric system, to replace a jurisdiction's traditional measuring units.

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Microphone

A microphone, colloquially nicknamed mic or mike, is a transducer that converts sound into an electrical signal.

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Muffler

A muffler (silencer in many non-US English speaking countries) is a device for decreasing the amount of noise emitted by the exhaust of an internal combustion engine.

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Multimeter

A multimeter or a multitester, also known as a VOM (volt-ohm-milliammeter), is an electronic measuring instrument that combines several measurement functions in one unit.

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MythBusters (2006 season)

The cast of the television series MythBusters perform experiments to verify or debunk urban legends, old wives' tales, and the like.

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Naim NAIT

The Naim NAIT is an amplifier concept from the British hi-fi manufacturer, Naim Audio.

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Neper

The neper (symbol: Np) is a logarithmic unit for ratios of measurements of physical field and power quantities, such as gain and loss of electronic signals.

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Noise dosimeter

A noise dosimeter (American English) or noise dosemeter (British English) is a specialized sound level meter intended specifically to measure the noise exposure of a person integrated over a period of time; usually to comply with Health and Safety regulations such as the Occupational Safety and Health (OSHA) 29 CFR 1910.95 Occupational Noise Exposure Standard or EU Directive 2003/10/EC.

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Noise map

A noise map is a graphic representation of the sound level distribution existing in a given region, for a defined period.

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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 characteristics of vehicles, particularly cars and trucks.

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Nominal watt

Nominal wattage is used to simplify the measurement of the efficiency of a loudspeaker.

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NZ Performance Car

NZ Performance Car is a monthly automobile magazine and website, and is the biggest selling automotive and men’s lifestyle magazine in New Zealand.

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Outer ear

The outer ear, external ear, or auris externa is the external portion of the ear, which consists of the auricle (also pinna) and the ear canal.

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Outline of hydrology

The following outline is provided as an overview of and topical guide to hydrology: Hydrology – study of the movement, distribution, and quality of water on Earth and other planets, including the hydrologic cycle, water resources and environmental watershed sustainability.

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Pan law

Pan law, or pan rule, is a recording and mixing principle that states that any signal of equal amplitude and phase that is played in both channels of a stereo system will increase in loudness up to 6.02 dBSPL, provided there is perfect response in the loudspeaker system and perfect acoustics in the room.

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Particle acceleration

In a compressible sound transmission medium - mainly air - air particles get an accelerated motion: the particle acceleration or sound acceleration with the symbol a in metre/second2.

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Pascal (unit)

The pascal (symbol: Pa) is the SI derived unit of pressure used to quantify internal pressure, stress, Young's modulus and ultimate tensile strength.

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Phon

The phon is a unit of loudness level for pure tones.

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Piet Jeegers

Piet Jeegers is a Dutch clarinetist, teaching at the Brussels Conservatory.

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Pile driver

A pile driver is a device used to drive piles (poles) into soil to provide foundation support for buildings or other structures.

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Pitch (music)

Pitch is a perceptual property of sounds that allows their ordering on a frequency-related scale, or more commonly, pitch is the quality that makes it possible to judge sounds as "higher" and "lower" in the sense associated with musical melodies.

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PMC Ltd.

The Professional Monitor Company Limited, better known as PMC, is a British loudspeaker manufacturer, established in 1991.

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Pre-hospital ultrasound

Prehospital ultrasound is the specialized application of ultrasound by emergency service personnel, such as paramedics, to guide immediate care and first aid procedures.

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Pressure

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

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Pressure (disambiguation)

Pressure is an effect which occurs when a force is applied on a surface.

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Programme level

Programme level refers to the signal level that an audio source is transmitted or recorded at, and is important in audio if listeners of Compact Discs (CDs), radio and television are to get the best experience, without excessive noise in quiet periods or distortion of loud sounds.

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Propagation loss

In underwater acoustics, propagation loss is a measure of the reduction in sound intensity as the sound propagates away from an underwater sound source.

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Proximity effect (audio)

The proximity effect in audio is an increase in bass or low frequency response when a sound source is close to a directional or cardioid microphone.

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Psychoacoustics

Psychoacoustics is the scientific study of sound perception and audiology.

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Public address system

A public address system (PA system) is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment.

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Public Warning System (Singapore)

The Public Warning System is a network of civil defense sirens installed by the Singapore Civil Defence Force on over 2,000 strategic points in Singapore to warn Singaporeans of impending dangers and air raids.

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Quad Electrostatic Loudspeaker

The Quad Electrostatic Loudspeaker (ESL) is the world's first production full-range electrostatic loudspeaker, launched in 1957 by Quad Electroacoustics, then known as the Acoustical Manufacturing Co.

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Quiet PC

A quiet PC is a personal computer that makes very little, or no noise.

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Rayl

A Rayl, rayl or Rayleigh is one of two units of specific acoustic impedance or, equivalently, characteristic acoustic impedance; one an MKS unit, and the other a CGS unit.

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Reference tone

A reference tone is a pure tone corresponding to a known frequency, and produced at a stable sound pressure level (volume), usually by specialized equipment.

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ReplayGain

ReplayGain is a proposed standard published by David Robinson in 2001 to measure the perceived loudness of audio in computer audio formats such as MP3 and Ogg Vorbis.

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Rider (theater)

In theater (and musical performance), a rider is a set of requests or demands that a performer sets as criteria for performance.

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Rocket engine test facility

A rocket engine test facility is a location where rocket engines may be tested on the ground, under controlled conditions.

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Rotary woofer

A rotary woofer is a subwoofer-style loudspeaker which reproduces very low frequency content by using a conventional speaker voice coil's motion to change the pitch of a set of fan blades rotating at a constant speed.

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Rubens' tube

A Rubens' tube, also known as a standing wave flame tube, or simply flame tube, is an antique physics apparatus for demonstrating acoustic standing waves in a tube.

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Sending loudness rating

The sending loudness rating (SLR) is a measure of the loudness of the transmit audio sent through the microphone of a communication device (for example, a mobile phone) It compares the Sound intensity of the sound waves into the microphone to the resulting audio signal.

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Shooting range

A shooting range or firing range or archery range or pistol range or rifle range or shooting gallery or shooting ground is a specialized facility designed for archery or firearms practice.

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Shure SM57

The Shure SM57 is a low-impedance, cardioid, dynamic microphone made by Shure Incorporated and commonly used in live sound reinforcement and studio recording.

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Signal

A signal as referred to in communication systems, signal processing, and electrical engineering is a function that "conveys information about the behavior or attributes of some phenomenon".

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Silencer (firearms)

A silencer, suppressor, sound suppressor, or sound moderator is a device that reduces the sound intensity and muzzle flash when a firearm or air gun is discharged.

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Smaart

Smaart is a suite of audio and acoustical measurements and instrumentation software tools.

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Smiley face curve

A smiley face curve (also known as "mid scoop") in audio signal processing, is a target frequency response curve characterized by boosted low and high frequencies coupled with reduced midrange frequency power.

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Snack Sound Toolkit

The Snack Sound Toolkit is a cross-platform library written by Kåre Sjölander of the Swedish Royal Technical University (KTH) with bindings for the scripting languages Tcl, Python, and Ruby.

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Sone

The sone is a unit of loudness, how loud a sound is perceived.

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Sonic weapon

Sonic and ultrasonic weapons (USW) are weapons of various types that use sound to injure, incapacitate, or kill an opponent.

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Soultone

Soultone (full name: Soultone Amplification, Inc.), is an American guitar amplifier manufacturing company, based in Chandler, Arizona, and known for making hand wired instrument amplifiers using vintage and modern techniques, components, and features.

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Sound

In physics, sound is a vibration that typically propagates as an audible wave of pressure, through a transmission medium such as a gas, liquid or solid.

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Sound annoyance

Sound annoyance is "a feeling of displeasure associated with any agent or condition that is believed to affect adversely an individual or a group".

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Sound energy

Sound energy is a form of energy associated with the vibration of matter.

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Sound energy density

Sound energy density or sound density is the sound energy per unit volume.

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Sound exposure

Sound exposure is the integral, over time, of squared sound pressure.

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Sound from ultrasound

Sound from ultrasound is the name given here to the generation of audible sound from modulated ultrasound without using an active receiver.

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Sound intensity

Sound intensity level also known as acoustic intensity is defined as the power carried by sound waves per unit area in a direction perpendicular to that area.

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Sound intensity probe

A sound intensity probe is a probe capable of measuring sound intensity.

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Sound level

Sound level refers to various logarithmic measurements of audible vibrations and may refer to.

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Sound level meter

A sound level meter is used for acoustic (sound that travels through air) measurements.

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Sound power

Sound power or acoustic power is the rate at which sound energy is emitted, reflected, transmitted or received, per unit time.

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Speaker grille

A speaker grille (or speaker grill) is usually found in front of many consumer and industrial loudspeakers, and consists of either a hard or soft screen/grille mounted directly over the face of the speaker driver.

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Speech interference level

Speech Interference Level (SIL) is an acoustical parameter calculated from sound pressure levels measured in octave bands.

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SPL

SPL may refer to.

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Stack light

Stack lights (aka: signal tower lights, indicator lights, AndOn lights, warning lights, industrial signal lights, tower lights and light towers) are commonly used on equipment in industrial manufacturing and process control environments to provide visual and audible indicators of a machine state or process event to machine operators, technicians, production managers and factory personnel.

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Steam whistle

A steam whistle is a device used to produce sound with the aid of live steam, which acts as a vibrating system (compare to train horn).

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Subaudible tone

For the use of subaudible tones in Two-way radio see: CTCSS A subaudible tone is a tone that is used to trigger an automated event at a radio station.

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Subwoofer

A subwoofer (or sub) is a woofer, or a complete loudspeaker, which is dedicated to the reproduction of low-pitched audio frequencies known as bass and sub-bass.

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Tammar wallaby

The tammar wallaby (Macropus eugenii), also known as the dama wallaby or darma wallaby, is a small macropod native to South and Western Australia.

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Threshold of pain

The threshold of pain or pain threshold is the point along a curve of increasing perception of a stimulus at which pain begins to be felt.

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Train horn

A train horn is a powerful air horn that serves as an audible warning device on electric and Diesel locomotives.

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Transmission line loudspeaker

A transmission line loudspeaker is a loudspeaker enclosure design (topology) that uses an acoustic transmission line within the cabinet, compared to the simpler enclosures used by sealed (closed) or ported (bass reflex) designs.

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Transmission loss

Transmission loss (TL) in general describes the accumulated decrease in intensity of a waveform energy as a wave propagates outwards from a source, or as it propagates through a certain area or through a certain type of structure.

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Tube sound

Tube sound (or valve sound) is the characteristic sound associated with a vacuum tube amplifier (valve amplifier in British English), a vacuum tube-based audio amplifier.

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Ultrasonic antifouling

Ultrasonic antifouling is a technology that helps reduce fouling on underwater structures, through using small-scale acoustic cavitation to destroy, denature and discourage attachment of algae and other single-celled organisms.

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Ultrasound computer tomography

Ultrasound computer tomography (USCT), sometimes also Ultrasound computed tomography, Ultrasound computerized tomography or just Ultrasound tomography, is a form of medical ultrasound tomography utilizing ultrasound waves as physical phenomenon for imaging.

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Underwater acoustics

Underwater acoustics is the study of the propagation of sound in water and the interaction of the mechanical waves that constitute sound with the water and its boundaries.

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Vocal effort

Vocal effort is a quantity varied by speakers when adjusting to an increase or decrease in the communication distance.

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Wavelength

In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.

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Weighting filter

A weighting filter is used to emphasize or suppress some aspects of a phenomenon compared to others, for measurement or other purposes.

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Welrod

The Welrod is a British bolt action, magazine fed, suppressed pistol devised during World War II at the Inter-Services Research Bureau (later Station IX), based near Welwyn Garden City, United Kingdom, for use by irregular forces and resistance groups.

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Woofer

A woofer or bass speaker is a technical term for loudspeaker driver designed to produce low frequency sounds, typically from 40 Hz up to 500 Hz.

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1883 eruption of Krakatoa

The 1883 eruption of Krakatoa in the Dutch East Indies (now Indonesia) began in the afternoon of Sunday, 26 August 1883 (with origins as early as May of that year), and peaked in the late morning of Monday, 27 August when over 70% of the island and its surrounding archipelago were destroyed as it collapsed into a caldera.

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3D sound reconstruction

3D sound reconstruction is the application of reconstruction techniques to 3D sound localization technology.

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Redirects here:

Acoustic pressure, DB SPL, DBSPL, Sound pressure level.

References

[1] https://en.wikipedia.org/wiki/Sound_pressure

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