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34 relations: Absolute value, Acoustic attenuation, Acoustic ohm, Analytic signal, Bulk modulus, Complex number, Convolution, Density, Earthquake bomb, Electrical impedance, Fluid, Fourier transform, Hilbert transform, Imaginary unit, Impedance analogy, Intensive and extensive properties, International System of Units, Laplace transform, Linear time-invariant theory, Longitudinal wave, Newton's laws of motion, Particle displacement, Particle velocity, Positive and negative parts, Rayl, Room acoustics, Shear modulus, Solid, Sound pressure, Speed of sound, Transverse wave, Underwater acoustics, Volumetric flow rate, Wave equation.
Absolute value
In mathematics, the absolute value or modulus of a real number is the non-negative value of without regard to its sign.
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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 ohm
The acoustic ohm is a unit of measurement of acoustic impedance, which is the ratio of acoustic pressure to acoustic volume flow.
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Analytic signal
In mathematics and signal processing, an analytic signal is a complex-valued function that has no negative frequency components.
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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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Complex number
A complex number is a number that can be expressed in the form, where and are real numbers, and is a solution of the equation.
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Convolution
In mathematics (and, in particular, functional analysis) convolution is a mathematical operation on two functions (f and g) to produce a third function, that is typically viewed as a modified version of one of the original functions, giving the integral of the pointwise multiplication of the two functions as a function of the amount that one of the original functions is translated.
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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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Earthquake bomb
The earthquake bomb, or seismic bomb, was a concept that was invented by the British aeronautical engineer Barnes Wallis early in World War II and subsequently developed and used during the war against strategic targets in Europe.
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Electrical impedance
Electrical impedance is the measure of the opposition that a circuit presents to a current when a voltage is applied.
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Fluid
In physics, a fluid is a substance that continually deforms (flows) under an applied shear stress.
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Fourier transform
The Fourier transform (FT) decomposes a function of time (a signal) into the frequencies that make it up, in a way similar to how a musical chord can be expressed as the frequencies (or pitches) of its constituent notes.
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Hilbert transform
In mathematics and in signal processing, the Hilbert transform is a specific linear operator that takes a function, u(t) of a real variable and produces another function of a real variable H(u)(t).
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Imaginary unit
The imaginary unit or unit imaginary number is a solution to the quadratic equation.
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Impedance analogy
The impedance analogy is a method of representing a mechanical system by an analogous electrical system.
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Intensive and extensive properties
Physical properties of materials and systems can often be categorized as being either intensive or extensive quantities, according to how the property changes when the size (or extent) of the system changes.
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International System of Units
The International System of Units (SI, abbreviated from the French Système international (d'unités)) is the modern form of the metric system, and is the most widely used system of measurement.
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Laplace transform
In mathematics, the Laplace transform is an integral transform named after its discoverer Pierre-Simon Laplace.
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Linear time-invariant theory
Linear time-invariant theory, commonly known as LTI system theory, comes from applied mathematics and has direct applications in NMR spectroscopy, seismology, circuits, signal processing, control theory, and other technical areas.
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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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Newton's laws of motion
Newton's laws of motion are three physical laws that, together, laid the foundation for classical mechanics.
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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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Positive and negative parts
In mathematics, the positive part of a real or extended real-valued function is defined by the formula Intuitively, the graph of f^+ is obtained by taking the graph of f, chopping off the part under the x-axis, and letting f^+ take the value zero there.
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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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Room acoustics
Room acoustics describes how sound behaves in an enclosed space.
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Shear modulus
In materials science, shear modulus or modulus of rigidity, denoted by G, or sometimes S or μ, is defined as the ratio of shear stress to the shear strain: where The derived SI unit of shear modulus is the pascal (Pa), although it is usually expressed in gigapascals (GPa) or in thousands of pounds per square inch (ksi).
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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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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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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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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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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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Volumetric flow rate
In physics and engineering, in particular fluid dynamics and hydrometry, the volumetric flow rate (also known as volume flow rate, rate of fluid flow or volume velocity) is the volume of fluid which passes per unit time; usually represented by the symbol (sometimes). The SI unit is m3/s (cubic metres per second).
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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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References
[1] https://en.wikipedia.org/wiki/Acoustic_impedance
