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Index 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. [1]

163 relations: Absolute threshold of hearing, Acoustic attenuation, Acoustic emission, Acoustic impedance, Acoustic levitation, Acoustic location, Acoustic phonetics, Acoustic streaming, Acoustic tag, Acoustic wave, Acoustic wave equation, Acoustical engineering, Acoustical Society of America, Active noise control, Aeroacoustics, Aircraft, American Institute of Aeronautics and Astronautics, Ancient Greek, ANSI/ASA S1.1-2013, Applied Acoustics, Archaeoacoustics, Architectural acoustics, Aristotle, ASME, Audio Engineering Society, Audio frequency, Audio signal processing, Audiology, Auditory illusion, Bachelor's degree, Bioacoustics, Cochlear implant, Cognitive neuroscience of music, De architectura, Diffraction, Doctor of Philosophy, Doppler effect, Ear, Earthquake, Echo suppression and cancellation, Electret microphone, Electromagnetism, Electrostatics, Engineering, Faculty (academic staff), Fisheries acoustics, Fluid, Frequency, Galileo Galilei, Ground vibrations, ..., Harmonic, Harmonic series (music), Hearing, Hearing aid, Helioseismology, Hermann von Helmholtz, Hertz, Hydrophone, Infrasound, Institute of Acoustics, Institute of Electrical and Electronics Engineers, International Commission for Acoustics, International Computer Music Association, International Conference on Acoustics, Speech, and Signal Processing, Interval (music), Jay Pritzker Pavilion, John William Strutt, 3rd Baron Rayleigh, Journal of Sound and Vibration, Journal of the Acoustical Society of America, Lamb waves, LARES, Linear elasticity, Linguistics, Longitudinal wave, Loudness, Loudspeaker, Marin Mersenne, Mathematics, Mechanical wave, Medical ultrasound, Mersenne's laws, Microphone, Mobile phone, MP3, Music, Music information retrieval, Music therapy, Musical instrument, Musical tuning, Nature (journal), Neurophysiology, Noise, Noise control, Noise pollution, Ocean acoustic tomography, Opus (audio format), Outline of acoustics, Overtone, P-wave, Philosophiæ Naturalis Principia Mathematica, Phonon, Physical acoustics, Physics, Physics and Astronomy Classification Scheme, Physiology, Picosecond ultrasonics, Piezoelectricity, Psychoacoustics, Psychology, Public address system, Pythagoras, Rayleigh wave, Reflection (physics), Refraction, Robert Bruce Lindsay, Science, Scientific Revolution, Seismology, Shock wave, Sonar, Sonic boom, Sonification, Sonochemistry, Sonoluminescence, Sound, Sound pressure, Sound recording and reproduction, Sound reinforcement system, Soundproofing, Soundscape, Spectrogram, Spectrum analyzer, Speech, Speech recognition, Speech synthesis, Speed of sound, Structural acoustics, Submarine, Surface acoustic wave, Surface wave, The Little Red Book of Acoustics, Thermoacoustics, Tranquillity, Transducer, Transmission medium, Transverse wave, Tweeter, Ultrasonics (journal), Ultrasound, Underwater acoustics, Uta Merzbach, Vibration, Vibration control, Vibration isolation, Vibration white finger, Virtual reality, Vitruvius, Voice coil, Wallace Clement Sabine, Wave, Wave equation, Wave interference, Woofer. Expand index (113 more) »

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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Acoustic attenuation

Acoustic attenuation is a measure of the energy loss of sound propagation in media.

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Acoustic emission

Acoustic emission (AE) is the phenomenon of radiation of acoustic (elastic) waves in solids that occurs when a material undergoes irreversible changes in its internal structure, for example as a result of crack formation or plastic deformation due to aging, temperature gradients or external mechanical forces.

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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 levitation

Acoustic levitation (also: Acoustophoresis) is a method for suspending matter in a medium by using acoustic radiation pressure from intense sound waves in the medium.

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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 phonetics

Acoustic phonetics is a subfield of phonetics, which deals with acoustic aspects of speech sounds.

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Acoustic streaming

Acoustic streaming is a steady flow in a fluid driven by the absorption of high amplitude acoustic oscillations.

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Acoustic tag

Acoustic tags are small sound-emitting devices that allow the detection and/or remote tracking of fish in three dimensions for fisheries research.

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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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Acoustical engineering

Acoustical engineering (also known as acoustic engineering) is the branch of engineering dealing with sound and vibration.

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Acoustical Society of America

The Acoustical Society of America (ASA) is an international scientific society dedicated to generating, disseminating and promoting the knowledge of acoustics and its practical applications.

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Active noise control

Active noise control (ANC), also known as noise cancellation, or active noise reduction (ANR), is a method for reducing unwanted sound by the addition of a second sound specifically designed to cancel the first.

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Aeroacoustics is a branch of acoustics that studies noise generation via either turbulent fluid motion or aerodynamic forces interacting with surfaces.

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An aircraft is a machine that is able to fly by gaining support from the air.

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American Institute of Aeronautics and Astronautics

The American Institute of Aeronautics and Astronautics (AIAA) is a professional society for the field of aerospace engineering.

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Ancient Greek

The Ancient Greek language includes the forms of Greek used in ancient Greece and the ancient world from around the 9th century BC to the 6th century AD.

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ANSI/ASA S1.1-2013

ANSI/ASA S1.1-2013, published by the American National Standards Institute (ANSI), is the current American National Standard on Acoustical Terminology.

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Applied Acoustics

Applied Acoustics (French: Acoustique Appliquée, German: Angewandte Akustik) is a bimonthly peer-reviewed scientific journal.

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Archaeoacoustics is the use of acoustical study as a methodological approach within archaeology.

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Architectural acoustics

Architectural acoustics (also known as room acoustics and building acoustics) is the science and engineering of achieving a good sound within a building and is a branch of acoustical engineering.

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Aristotle (Ἀριστοτέλης Aristotélēs,; 384–322 BC) was an ancient Greek philosopher and scientist born in the city of Stagira, Chalkidiki, in the north of Classical Greece.

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The American Society of Mechanical Engineers (ASME) is a professional association that, in its own words, "promotes the art, science, and practice of multidisciplinary engineering and allied sciences around the globe" via "continuing education, training and professional development, codes and standards, research, conferences and publications, government relations, and other forms of outreach." ASME is thus an engineering society, a standards organization, a research and development organization, a lobbying organization, a provider of training and education, and a nonprofit organization.

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Audio Engineering Society

Established in 1948, the Audio Engineering Society (AES) draws its membership from engineers, scientists, other individuals with an interest or involvement in the professional audio industry.

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Audio frequency

An audio frequency (abbreviation: AF) or audible frequency is characterized as a periodic vibration whose frequency is audible to the average human.

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Audio signal processing

Audio signal processing or audio processing is the intentional alteration of audio signals often through an audio effect or effects unit.

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Audiology (from Latin audīre, "to hear"; and from Greek -λογία, -logia) is a branch of science that studies hearing, balance, and related disorders.

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Auditory illusion

An auditory illusion is an illusion of hearing, the aural equivalent of an optical illusion: the listener hears either sounds which are not present in the stimulus, or "impossible" sounds.

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Bachelor's degree

A bachelor's degree (from Middle Latin baccalaureus) or baccalaureate (from Modern Latin baccalaureatus) is an undergraduate academic degree awarded by colleges and universities upon completion of a course of study lasting three to seven years (depending on institution and academic discipline).

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Bioacoustics is a cross-disciplinary science that combines biology and acoustics.

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Cochlear implant

A cochlear implant (CI) is a surgically implanted electronic device that provides a sense of sound to a person with severe to profound sensorineural hearing loss in both ears.

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Cognitive neuroscience of music

The cognitive neuroscience of music is the scientific study of brain-based mechanisms involved in the cognitive processes underlying music.

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De architectura

De architectura (On architecture, published as Ten Books on Architecture) is a treatise on architecture written by the Roman architect and military engineer Marcus Vitruvius Pollio and dedicated to his patron, the emperor Caesar Augustus, as a guide for building projects.

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--> Diffraction refers to various phenomena that occur when a wave encounters an obstacle or a slit.

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Doctor of Philosophy

A Doctor of Philosophy (PhD or Ph.D.; Latin Philosophiae doctor) is the highest academic degree awarded by universities in most countries.

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Doppler effect

The Doppler effect (or the Doppler shift) is the change in frequency or wavelength of a wave in relation to observer who is moving relative to the wave source.

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The ear is the organ of hearing and, in mammals, balance.

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An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth, resulting from the sudden release of energy in the Earth's lithosphere that creates seismic waves.

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Echo suppression and cancellation

Echo suppression and echo cancellation are methods used in telephony to improve voice quality by preventing echo from being created or removing it after it is already present.

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Electret microphone

An electret microphone is a type of electrostatic capacitor-based microphone, which eliminates the need for a polarizing power supply by using a permanently charged material.

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Electromagnetism is a branch of physics involving the study of the electromagnetic force, a type of physical interaction that occurs between electrically charged particles.

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Electrostatics is a branch of physics that studies electric charges at rest.

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Engineering is the creative application of science, mathematical methods, and empirical evidence to the innovation, design, construction, operation and maintenance of structures, machines, materials, devices, systems, processes, and organizations.

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Faculty (academic staff)

Faculty (in North American usage) or academics (in British, Australia, and New Zealand usage) are the academic staff of a university: professors of various ranks, lecturers, and/or researchers.

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Fisheries acoustics

Fisheries acoustics includes a range of research and practical application topics using acoustical devices as sensors in aquatic environments.

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In physics, a fluid is a substance that continually deforms (flows) under an applied shear stress.

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Frequency is the number of occurrences of a repeating event per unit of time.

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Galileo Galilei

Galileo Galilei (15 February 1564Drake (1978, p. 1). The date of Galileo's birth is given according to the Julian calendar, which was then in force throughout Christendom. In 1582 it was replaced in Italy and several other Catholic countries with the Gregorian calendar. Unless otherwise indicated, dates in this article are given according to the Gregorian calendar. – 8 January 1642) was an Italian polymath.

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Ground vibrations

Ground vibrations is a technical term that is being used to describe mostly man-made vibrations of the ground, in contrast to natural vibrations of the Earth studied by seismology.

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A harmonic is any member of the harmonic series, a divergent infinite series.

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Harmonic series (music)

A harmonic series is the sequence of sounds—pure tones, represented by sinusoidal waves—in which the frequency of each sound is an integer multiple of the fundamental, the lowest frequency.

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Hearing, or auditory perception, is the ability to perceive sounds by detecting vibrations, changes in the pressure of the surrounding medium through time, through an organ such as the ear.

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Hearing aid

A hearing aid is a device designed to improve hearing by making sound audible to a person with hearing loss.

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Helioseismology, a term coined by Douglas Gough, is the study of the structure and dynamics of the Sun through its oscillations.

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Hermann von Helmholtz

Hermann Ludwig Ferdinand von Helmholtz (August 31, 1821 – September 8, 1894) was a German physician and physicist who made significant contributions in several scientific fields.

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The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.

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A hydrophone (Ancient Greek ὕδωρ.

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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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Institute of Acoustics

The Institute of Acoustics (IOA) is a British professional engineering institution founded in 1974.

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Institute of Electrical and Electronics Engineers

The Institute of Electrical and Electronics Engineers (IEEE) is a professional association with its corporate office in New York City and its operations center in Piscataway, New Jersey.

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International Commission for Acoustics

The purpose of the International Commission for Acoustics (ICA) is to promote international development and collaboration in all fields of acoustics including research, development, education, and standardisation.

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International Computer Music Association

The International Computer Music Association (ICMA) is an international affiliation of individuals and institutions involved in the technical, creative, and performance aspects of computer music.

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International Conference on Acoustics, Speech, and Signal Processing

ICASSP, the International Conference on Acoustics, Speech, and Signal Processing, is an annual flagship conference organized of IEEE Signal Processing Society.

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Interval (music)

In music theory, an interval is the difference between two pitches.

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Jay Pritzker Pavilion

Jay Pritzker Pavilion, also known as Pritzker Pavilion or Pritzker Music Pavilion, is a bandshell in Millennium Park in the Loop community area of Chicago in Cook County, Illinois, United States.

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John William Strutt, 3rd Baron Rayleigh

John William Strutt, 3rd Baron Rayleigh, (12 November 1842 – 30 June 1919) was a physicist who, with William Ramsay, discovered argon, an achievement for which he earned the Nobel Prize for Physics in 1904.

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Journal of Sound and Vibration

The Journal of Sound and Vibration is a scientific journal in the field of acoustics.

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Journal of the Acoustical Society of America

The Journal of the Acoustical Society of America (abbreviated J. Acoust. Soc. Am. or JASA) is a scientific journal in the field of acoustics, published by the Acoustical Society of America.

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Lamb waves

Lamb waves propagate in solid plates.

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LARES is an electronic sound enhancement system that uses microprocessors to control multiple loudspeakers and microphones placed around a performance space for the purpose of providing active acoustic treatment.

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Linear elasticity

Linear elasticity is the mathematical study of how solid objects deform and become internally stressed due to prescribed loading conditions.

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Linguistics is the scientific study of language, and involves an analysis of language form, language meaning, and language in context.

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Longitudinal wave

Longitudinal waves are waves in which the displacement of the medium is in the same direction as, or the opposite direction to, the direction of propagation of the wave.

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

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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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Marin Mersenne

Marin Mersenne, Marin Mersennus or le Père Mersenne (8 September 1588 – 1 September 1648) was a French polymath, whose works touched a wide variety of fields.

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Mathematics (from Greek μάθημα máthēma, "knowledge, study, learning") is the study of such topics as quantity, structure, space, and change.

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Mechanical wave

A mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a medium.

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Medical ultrasound

Medical ultrasound (also known as diagnostic sonography or ultrasonography) is a diagnostic imaging technique based on the application of ultrasound.

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Mersenne's laws

Mersenne's laws are laws describing the frequency of oscillation of a stretched string or monochord, useful in musical tuning and musical instrument construction.

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

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Mobile phone

A mobile phone, known as a cell phone in North America, is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area.

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MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) is an audio coding format for digital audio.

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Music is an art form and cultural activity whose medium is sound organized in time.

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Music information retrieval

Music information retrieval (MIR) is the interdisciplinary science of retrieving information from music.

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Music therapy

Music therapy is the clinical and evidence-based use of music interventions to accomplish individualized goals within a therapeutic relationship by a credentialed professional who has completed an approved music therapy program.

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Musical instrument

A musical instrument is an instrument created or adapted to make musical sounds.

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Musical tuning

In music, there are two common meanings for tuning.

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Nature (journal)

Nature is a British multidisciplinary scientific journal, first published on 4 November 1869.

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Neurophysiology (from Greek νεῦρον, neuron, "nerve"; φύσις, physis, "nature, origin"; and -λογία, -logia, "knowledge") is a branch of physiology and neuroscience that is concerned with the study of the functioning of the nervous system.

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Noise is unwanted sound judged to be unpleasant, loud or disruptive to hearing.

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Noise control

Noise control or noise mitigation is a set of strategies to reduce noise pollution or to reduce the impact of that noise, whether outdoors or indoors.

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Noise pollution

Sound pollution, also known as environmental noise or noise pollution, is the propagation of noise with harmful impact on the activity of human or animal life.

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Ocean acoustic tomography

Ocean acoustic tomography is a technique used to measure temperatures and currents over large regions of the ocean.

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Opus (audio format)

Opus is a lossy audio coding format developed by the Xiph.Org Foundation and standardized by the Internet Engineering Task Force, designed to efficiently code speech and general audio in a single format, while remaining low-latency enough for real-time interactive communication and low-complexity enough for low-end embedded processors.

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Outline of acoustics

The following outline is provided as an overview of and topical guide to acoustics: Acoustics – interdisciplinary science 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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An overtone is any frequency greater than the fundamental frequency of a sound.

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A P-wave is one of the two main types of elastic body waves, called seismic waves in seismology.

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Philosophiæ Naturalis Principia Mathematica

Philosophiæ Naturalis Principia Mathematica (Latin for Mathematical Principles of Natural Philosophy), often referred to as simply the Principia, is a work in three books by Isaac Newton, in Latin, first published 5 July 1687.

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In physics, a phonon is a collective excitation in a periodic, elastic arrangement of atoms or molecules in condensed matter, like solids and some liquids.

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Physical acoustics

Physical acoustics is the area of acoustics and physics that studies interactions of acoustic waves with a gaseous, liquid or solid medium on macro- and micro-levels.

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Physics (from knowledge of nature, from φύσις phýsis "nature") is the natural science that studies matterAt the start of The Feynman Lectures on Physics, Richard Feynman offers the atomic hypothesis as the single most prolific scientific concept: "If, in some cataclysm, all scientific knowledge were to be destroyed one sentence what statement would contain the most information in the fewest words? I believe it is that all things are made up of atoms – little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one another..." and its motion and behavior through space and time and that studies the related entities of energy and force."Physical science is that department of knowledge which relates to the order of nature, or, in other words, to the regular succession of events." Physics is one of the most fundamental scientific disciplines, and its main goal is to understand how the universe behaves."Physics is one of the most fundamental of the sciences. Scientists of all disciplines use the ideas of physics, including chemists who study the structure of molecules, paleontologists who try to reconstruct how dinosaurs walked, and climatologists who study how human activities affect the atmosphere and oceans. Physics is also the foundation of all engineering and technology. No engineer could design a flat-screen TV, an interplanetary spacecraft, or even a better mousetrap without first understanding the basic laws of physics. (...) You will come to see physics as a towering achievement of the human intellect in its quest to understand our world and ourselves."Physics is an experimental science. Physicists observe the phenomena of nature and try to find patterns that relate these phenomena.""Physics is the study of your world and the world and universe around you." Physics is one of the oldest academic disciplines and, through its inclusion of astronomy, perhaps the oldest. Over the last two millennia, physics, chemistry, biology, and certain branches of mathematics were a part of natural philosophy, but during the scientific revolution in the 17th century, these natural sciences emerged as unique research endeavors in their own right. Physics intersects with many interdisciplinary areas of research, such as biophysics and quantum chemistry, and the boundaries of physics are not rigidly defined. New ideas in physics often explain the fundamental mechanisms studied by other sciences and suggest new avenues of research in academic disciplines such as mathematics and philosophy. Advances in physics often enable advances in new technologies. For example, advances in the understanding of electromagnetism and nuclear physics led directly to the development of new products that have dramatically transformed modern-day society, such as television, computers, domestic appliances, and nuclear weapons; advances in thermodynamics led to the development of industrialization; and advances in mechanics inspired the development of calculus.

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Physics and Astronomy Classification Scheme

The Physics and Astronomy Classification Scheme (PACS) is a scheme developed in 1970 by the American Institute of Physics (AIP) for classifying scientific literature using a hierarchical set of codes.

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Physiology is the scientific study of normal mechanisms, and their interactions, which work within a living system.

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Picosecond ultrasonics

Picosecond ultrasonics is a type of ultrasonics that uses ultra-high frequency ultrasound generated by ultrashort light pulses.

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Piezoelectricity is the electric charge that accumulates in certain solid materials (such as crystals, certain ceramics, and biological matter such as bone, DNA and various proteins) in response to applied mechanical stress.

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Psychoacoustics is the scientific study of sound perception and audiology.

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Psychology is the science of behavior and mind, including conscious and unconscious phenomena, as well as feeling and thought.

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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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Pythagoras of Samos was an Ionian Greek philosopher and the eponymous founder of the Pythagoreanism movement.

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Rayleigh wave

Rayleigh waves are a type of surface acoustic wave that travel along the surface of solids.

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Reflection (physics)

Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated.

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Refraction is the change in direction of wave propagation due to a change in its transmission medium.

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Robert Bruce Lindsay

Robert Bruce Lindsay (1 January 1900 – 2 March 1985) was an American physicist and physics professor, known for his prolific authorship of physics books in acoustics, and historical and philosophical analyses of physics.

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R. P. Feynman, The Feynman Lectures on Physics, Vol.1, Chaps.1,2,&3.

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Scientific Revolution

The Scientific Revolution was a series of events that marked the emergence of modern science during the early modern period, when developments in mathematics, physics, astronomy, biology (including human anatomy) and chemistry transformed the views of society about nature.

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Seismology (from Ancient Greek σεισμός (seismós) meaning "earthquake" and -λογία (-logía) meaning "study of") is the scientific study of earthquakes and the propagation of elastic waves through the Earth or through other planet-like bodies.

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Shock wave

In physics, a shock wave (also spelled shockwave), or shock, is a type of propagating disturbance.

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Sonar (originally an acronym for SOund Navigation And Ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels.

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Sonic boom

A sonic boom is the sound associated with the shock waves created whenever an object traveling through the air travels faster than the speed of sound.

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Sonification is the use of non-speech audio to convey information or perceptualize data.

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In chemistry, the study of sonochemistry is concerned with understanding the effect of ultrasound in forming acoustic cavitation in liquids, resulting in the initiation or enhancement of the chemical activity in the solution.

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Sonoluminescence is the emission of short bursts of light from imploding bubbles in a liquid when excited by sound.

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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 pressure

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

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Sound recording and reproduction

Sound recording and reproduction is an electrical, mechanical, electronic, or digital inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects.

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Sound reinforcement system

A sound reinforcement system is the combination of microphones, signal processors, amplifiers, and loudspeakers in enclosures all controlled by a mixing console that makes live or pre-recorded sounds louder and may also distribute those sounds to a larger or more distant audience.

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Soundproofing is any means of reducing the sound pressure with respect to a specified sound source and receptor.

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The soundscape is the component of the acoustic environment that can be perceived by humans.

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A spectrogram is a visual representation of the spectrum of frequencies of sound or other signal as they vary with time.

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Spectrum analyzer

A spectrum analyzer measures the magnitude of an input signal versus frequency within the full frequency range of the instrument.

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Speech is the vocalized form of communication used by humans and some animals, which is based upon the syntactic combination of items drawn from the lexicon.

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Speech recognition

Speech recognition is the inter-disciplinary sub-field of computational linguistics that develops methodologies and technologies that enables the recognition and translation of spoken language into text by computers.

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Speech synthesis

Speech synthesis is the artificial production of human speech.

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Speed of sound

The speed of sound is the distance travelled per unit time by a sound wave as it propagates through an elastic medium.

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Structural acoustics

Structural acoustics is the study of the mechanical waves in structures and how they interact with and radiate into adjacent media.

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A submarine (or simply sub) is a watercraft capable of independent operation underwater.

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Surface acoustic wave

A surface acoustic wave (SAW) is an acoustic wave traveling along the surface of a material exhibiting elasticity, with an amplitude that typically decays exponentially with depth into the substrate.

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Surface wave

In physics, a surface wave is a mechanical wave that propagates along the interface between differing media.

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The Little Red Book of Acoustics

The Little Red Book of Acoustics is a small book giving an overview of UK acoustic regulations.

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Thermoacoustics is the interaction between temperature, density and pressure variations of acoustic waves.

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Tranquillity (also spelled tranquility) is the quality or state of being tranquil; that is, calm, serene, and worry-free.

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A transducer is a device that converts energy from one form to another.

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Transmission medium

A transmission medium is a material substance (solid, liquid, gas, or plasma) that can propagate energy waves.

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Transverse wave

A transverse wave is a moving wave that consists of oscillations occurring perpendicular (right angled) to the direction of energy transfer (or the propagation of the wave).

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A tweeter or treble speaker is a special type of loudspeaker (usually dome or horn-type) that is designed to produce high audio frequencies, typically from around 2,000 Hz to 20,000 Hz (generally considered to be the upper limit of human hearing).

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Ultrasonics (journal)

Ultrasonics is a bimonthly peer reviewed scientific journal published by Elsevier and covering research on theory and application of ultrasonics in physics, biology, chemistry, medicine, underwater acoustics, industry, materials characterization, control, and other disciplines.

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Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing.

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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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Uta Merzbach

Uta Caecilia Merzbach (February 9, 1933 – June 27, 2017) was a German-American historian of mathematics who became the first curator of mathematical instruments at the Smithsonian Institution.

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Vibration is a mechanical phenomenon whereby oscillations occur about an equilibrium point.

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Vibration control

In earthquake engineering, vibration control is a set of technical means aimed to mitigate seismic impacts in building and non-building structures.

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Vibration isolation

Vibration isolation is the process of isolating an object, such as a piece of equipment, from the source of vibrations.

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Vibration white finger

Vibration white finger (VWF), also known as hand-arm vibration syndrome (HAVS) or dead finger, is a secondary form of Raynaud's syndrome, an industrial injury triggered by continuous use of vibrating hand-held machinery.

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Virtual reality

Virtual reality (VR) is an interactive computer-generated experience taking place within a simulated environment, that incorporates mainly auditory and visual, but also other types of sensory feedback like haptic.

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Marcus Vitruvius Pollio (c. 80–70 BC – after c. 15 BC), commonly known as Vitruvius, was a Roman author, architect, civil engineer and military engineer during the 1st century BC, known for his multi-volume work entitled De architectura.

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Voice coil

A voice coil (consisting of a former, collar, and winding) is the coil of wire attached to the apex of a loudspeaker cone.

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Wallace Clement Sabine

Wallace Clement Sabine (June 13, 1868 – January 10, 1919) was an American physicist who founded the field of architectural acoustics.

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In physics, a wave is a disturbance that transfers energy through matter or space, with little or no associated mass transport.

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Wave equation

The wave equation is an important second-order linear partial differential equation for the description of waves—as they occur in classical physics—such as mechanical waves (e.g. water waves, sound waves and seismic waves) or light waves.

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Wave interference

In physics, interference is a phenomenon in which two waves superpose to form a resultant wave of greater, lower, or the same amplitude.

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

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