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131 relations: A-weighting, Acoustic impedance, Acoustic theory, Acoustical engineering, Acoustics, Adiabatic process, Aeroacoustics, American National Standards Institute, Amplitude, Anharmonicity, ANSI S1.1-1994, ANSI/ASA S1.1-2013, Anti-predator adaptation, Architectural acoustics, Atmosphere, Attenuation, Audio engineer, Audio signal processing, Beat (acoustics), Bioacoustics, Bird vocalization, Brain, Bulk modulus, Characteristic impedance, Compression (physics), Decibel, Deformation (mechanics), Density, Diaphragm (acoustics), Doppler effect, Duration (music), Earth, Echo, Environmental noise, Euclidean vector, Frequency, Headphones, Hearing, Hearing range, Heat capacity ratio, Hertz, Homophony, Hydrosphere, If a tree falls in a forest, Infrasound, International Electrotechnical Commission, Isaac Newton, List of unexplained sounds, Longitudinal wave, Loudness, ..., Mammal, Marine mammal, Mechanical equilibrium, Medical ultrasound, Mel scale, Musical acoustics, Musical instrument, Musical tone, Navigation, Noise, Noise control, Organ (anatomy), Oscillation, Parametric array, Particle acceleration, Particle displacement, Particle velocity, Pascal (unit), Phenomenon, Phon, Phonaesthetics, Physics, Physiology, Pierre-Simon Laplace, Pink noise, Pitch (music), Plane wave, Plasma (physics), Polarization (waves), Polyphony, Predation, Pressure, Psychoacoustics, Psychology, Rarefaction, Ratio, Reflection (physics), Refraction, Relative direction, Resonance, Responsivity, Reverberation, Root mean square, Sense, Shear stress, Sine wave, Solid, Sonar, Sone, Sonic weapon, Sound box, Sound intensity, Sound localization, Sound power, Sound pressure, Sound recording and reproduction, Soundproofing, Soundscape, Speech, Speed of sound, Square root, Standard conditions for temperature and pressure, State of matter, Structural acoustics, Temporal envelope and fine structure, Texture (music), Timbre, Transmission medium, Transverse wave, Ultrasound, Underwater acoustics, Unison, Vacuum, Velocity, Vibration, Viscosity, Wave, Wave vector, Wavelength, White noise, Wind wave. Expand index (81 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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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 theory
Acoustic theory is a scientific field that relates to the description of sound waves.
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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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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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Adiabatic process
In thermodynamics, an adiabatic process is one that occurs without transfer of heat or matter between a thermodynamic system and its surroundings.
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Aeroacoustics
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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American National Standards Institute
The American National Standards Institute (ANSI) is a private non-profit organization that oversees the development of voluntary consensus standards for products, services, processes, systems, and personnel in the United States.
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Amplitude
The amplitude of a periodic variable is a measure of its change over a single period (such as time or spatial period).
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Anharmonicity
In classical mechanics, anharmonicity is the deviation of a system from being a harmonic oscillator.
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ANSI S1.1-1994
ANSI S1.1-1994, published by American National Standards Institute (ANSI), is an American National Standard on Acoustical Terminology.
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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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Anti-predator adaptation
Anti-predator adaptations are mechanisms developed through evolution that assist prey organisms in their constant struggle against predators.
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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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Atmosphere
An atmosphere is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body.
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Attenuation
In physics, attenuation or, in some contexts, extinction is the gradual loss of flux intensity through a medium.
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Audio engineer
An audio engineer (also sometimes recording engineer or a vocal engineer) helps to produce a recording or a performance, editing and adjusting sound tracks using equalization and audio effects, mixing, reproduction, and reinforcement of sound.
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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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Beat (acoustics)
In acoustics, a beat is an interference pattern between two sounds of slightly different frequencies, perceived as a periodic variation in volume whose rate is the difference of the two frequencies.
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Bioacoustics
Bioacoustics is a cross-disciplinary science that combines biology and acoustics.
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Bird vocalization
Bird vocalization includes both bird calls and bird songs.
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Brain
The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals.
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Bulk modulus
The bulk modulus (K or B) of a substance is a measure of how resistant to compressibility that substance is.
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Characteristic impedance
The characteristic impedance or surge impedance (usually written Z0) of a uniform transmission line is the ratio of the amplitudes of voltage and current of a single wave propagating along the line; that is, a wave travelling in one direction in the absence of reflections in the other direction.
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Compression (physics)
In mechanics, compression is the application of balanced inward ("pushing") forces to different points on a material or structure, that is, forces with no net sum or torque directed so as to reduce its size in one or more directions.
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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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Deformation (mechanics)
Deformation in continuum mechanics is the transformation of a body from a reference configuration to a current configuration.
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Density
The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume.
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Diaphragm (acoustics)
In the field of acoustics, a diaphragm is a transducer intended to inter-convert mechanical vibrations to sounds, or vice versa.
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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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Duration (music)
In music, duration is an amount of time or a particular time interval: how long or short a note, phrase, section, or composition lasts.
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Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
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Echo
In audio signal processing and acoustics, Echo is a reflection of sound that arrives at the listener with a delay after the direct sound.
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Environmental noise
Environmental noise is the summary of noise pollution from outside, caused by transport, industrial and recreational activities.
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Euclidean vector
In mathematics, physics, and engineering, a Euclidean vector (sometimes called a geometric or spatial vector, or—as here—simply a vector) is a geometric object that has magnitude (or length) and direction.
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Frequency
Frequency is the number of occurrences of a repeating event per unit of time.
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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
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 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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Heat capacity ratio
In thermal physics and thermodynamics, the heat capacity ratio or adiabatic index or ratio of specific heats or Poisson constant, is the ratio of the heat capacity at constant pressure to heat capacity at constant volume.
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Hertz
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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Homophony
In music, homophony (Greek: ὁμόφωνος, homóphōnos, from ὁμός, homós, "same" and φωνή, phōnē, "sound, tone") is a texture in which a primary part is supported by one or more additional strands that flesh out the harmony and often provide rhythmic contrast.
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Hydrosphere
The hydrosphere (from Greek ὕδωρ hydōr, "water" and σφαῖρα sphaira, "sphere") is the combined mass of water found on, under, and above the surface of a planet, minor planet or natural satellite.
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If a tree falls in a forest
"If a tree falls in a forest and no one is around to hear it, does it make a sound?" is a philosophical thought experiment that raises questions regarding observation and perception.
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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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International Electrotechnical Commission
The International Electrotechnical Commission (IEC; in French: Commission électrotechnique internationale) is an international standards organization that prepares and publishes International Standards for all electrical, electronic and related technologies – collectively known as "electrotechnology".
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Isaac Newton
Sir Isaac Newton (25 December 1642 – 20 March 1726/27) was an English mathematician, astronomer, theologian, author and physicist (described in his own day as a "natural philosopher") who is widely recognised as one of the most influential scientists of all time, and a key figure in the scientific revolution.
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List of unexplained sounds
The following is a list of unidentified, or formerly unidentified, sounds.
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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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Loudness
In acoustics, loudness is the subjective perception of sound pressure.
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Mammal
Mammals are the vertebrates within the class Mammalia (from Latin mamma "breast"), a clade of endothermic amniotes distinguished from reptiles (including birds) by the possession of a neocortex (a region of the brain), hair, three middle ear bones, and mammary glands.
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Marine mammal
Marine mammals are aquatic mammals that rely on the ocean and other marine ecosystems for their existence.
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Mechanical equilibrium
In classical mechanics, a particle is in mechanical equilibrium if the net force on that particle is zero.
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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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Mel scale
The mel scale, named by Stevens, Volkmann, and Newman in 1937, is a perceptual scale of pitches judged by listeners to be equal in distance from one another.
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Musical acoustics
Musical acoustics or music acoustics is a branch of acoustics concerned with researching and describing the physics of music – how sounds are employed to make music.
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Musical instrument
A musical instrument is an instrument created or adapted to make musical sounds.
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Musical tone
Traditionally in Western music, a musical tone is a steady periodic sound.
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Navigation
Navigation is a field of study that focuses on the process of monitoring and controlling the movement of a craft or vehicle from one place to another.
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Noise
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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Organ (anatomy)
Organs are collections of tissues with similar functions.
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Oscillation
Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states.
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Parametric array
A parametric array, in the field of acoustics, is a nonlinear transduction mechanism that generates narrow, nearly side lobe-free beams of low frequency sound, through the mixing and interaction of high frequency sound waves, effectively overcoming the diffraction limit (a kind of spatial 'uncertainty principle') associated with linear acoustics.
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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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Particle displacement
Particle displacement or displacement amplitude is a measurement of distance of the movement of a particle from its equilibrium position in a medium as it transmits a second wave.
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Particle velocity
Particle velocity is the velocity of a particle (real or imagined) in a medium as it transmits a wave.
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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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Phenomenon
A phenomenon (Greek: φαινόμενον, phainómenon, from the verb phainein, to show, shine, appear, to be manifest or manifest itself, plural phenomena) is any thing which manifests itself.
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Phon
The phon is a unit of loudness level for pure tones.
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Phonaesthetics
Phonaesthetics (from the φωνή phōnē, "voice-sound"; and αἰσθητική aisthētikē, "aesthetics") is a branch of phonetics concerned with "the possible connection between sound sequences and meaning", according to Raymond Hickey.
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Physics
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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Physiology
Physiology is the scientific study of normal mechanisms, and their interactions, which work within a living system.
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Pierre-Simon Laplace
Pierre-Simon, marquis de Laplace (23 March 1749 – 5 March 1827) was a French scholar whose work was important to the development of mathematics, statistics, physics and astronomy.
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Pink noise
Pink noise or noise is a signal or process with a frequency spectrum such that the power spectral density (energy or power per frequency interval) is inversely proportional to the frequency of the signal.
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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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Plane wave
In the physics of wave propagation, a plane wave (also spelled planewave) is a wave whose wavefronts (surfaces of constant phase) are infinite parallel planes.
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Plasma (physics)
Plasma (Henry George Liddell, Robert Scott, A Greek English Lexicon, on Perseus) is one of the four fundamental states of matter, and was first described by chemist Irving Langmuir in the 1920s.
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Polarization (waves)
Polarization (also polarisation) is a property applying to transverse waves that specifies the geometrical orientation of the oscillations.
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Polyphony
In music, polyphony is one type of musical texture, where a texture is, generally speaking, the way that melodic, rhythmic, and harmonic aspects of a musical composition are combined to shape the overall sound and quality of the work.
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Predation
Predation is a biological interaction where a predator (a hunting animal) kills and eats its prey (the organism that is attacked).
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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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Psychoacoustics
Psychoacoustics is the scientific study of sound perception and audiology.
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Psychology
Psychology is the science of behavior and mind, including conscious and unconscious phenomena, as well as feeling and thought.
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Rarefaction
Rarefaction is the reduction of an item's density, the opposite of compression.
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Ratio
In mathematics, a ratio is a relationship between two numbers indicating how many times the first number contains the second.
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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
Refraction is the change in direction of wave propagation due to a change in its transmission medium.
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Relative direction
The most common relative directions are left, right, forward(s), backward(s), up, and down.
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Resonance
In physics, resonance is a phenomenon in which a vibrating system or external force drives another system to oscillate with greater amplitude at specific frequencies.
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Responsivity
Responsivity measures the input–output gain of a detector system.
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Reverberation
Reverberation, in psychoacoustics and acoustics, is a persistence of sound after the sound is produced.
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Root mean square
In statistics and its applications, the root mean square (abbreviated RMS or rms) is defined as the square root of the mean square (the arithmetic mean of the squares of a set of numbers).
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Sense
A sense is a physiological capacity of organisms that provides data for perception.
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Shear stress
A shear stress, often denoted by (Greek: tau), is the component of stress coplanar with a material cross section.
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Sine wave
A sine wave or sinusoid is a mathematical curve that describes a smooth periodic oscillation.
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Solid
Solid is one of the four fundamental states of matter (the others being liquid, gas, and plasma).
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Sonar
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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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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Sound box
A sound box or sounding box (sometimes written soundbox) is an open chamber in the body of a musical instrument which modifies the sound of the instrument, and helps transfer that sound to the surrounding air.
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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 localization
Sound localization is a listener's ability to identify the location or origin of a detected sound in direction and distance.
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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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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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Soundproofing
Soundproofing is any means of reducing the sound pressure with respect to a specified sound source and receptor.
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Soundscape
The soundscape is the component of the acoustic environment that can be perceived by humans.
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Speech
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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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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Square root
In mathematics, a square root of a number a is a number y such that; in other words, a number y whose square (the result of multiplying the number by itself, or) is a. For example, 4 and −4 are square roots of 16 because.
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Standard conditions for temperature and pressure
Standard conditions for temperature and pressure are standard sets of conditions for experimental measurements to be established to allow comparisons to be made between different sets of data.
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State of matter
In physics, a state of matter is one of the distinct forms in which matter can exist.
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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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Temporal envelope and fine structure
Temporal envelope (ENV) and temporal fine structure (TFS) are changes in the amplitude and frequency of sound perceived by humans over time.
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Texture (music)
In music, texture is how the tempo, melodic, and harmonic materials are combined in a composition, thus determining the overall quality of the sound in a piece.
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Timbre
In music, timbre (also known as tone color or tone quality from psychoacoustics) is the perceived sound quality of a musical note, sound or tone.
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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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Ultrasound
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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Unison
In music, unison is two or more musical parts sounding the same pitch or at an octave interval, usually at the same time.
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Vacuum
Vacuum is space devoid of matter.
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Velocity
The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time.
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Vibration
Vibration is a mechanical phenomenon whereby oscillations occur about an equilibrium point.
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Viscosity
The viscosity of a fluid is the measure of its resistance to gradual deformation by shear stress or tensile stress.
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Wave
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 vector
In physics, a wave vector (also spelled wavevector) is a vector which helps describe a wave.
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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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White noise
In signal processing, white noise is a random signal having equal intensity at different frequencies, giving it a constant power spectral density.
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Wind wave
In fluid dynamics, wind waves, or wind-generated waves, are surface waves that occur on the free surface of bodies of water (like oceans, seas, lakes, rivers, canals, puddles or ponds).
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References
[1] https://en.wikipedia.org/wiki/Sound
