The sound energy flux is the average rate of flow of soundenergy for one period through any specified area. A schematic representation of auditory signaling Sound is vibration, as perceived by the sense of hearing. ...
In a medium of density ρ for a plane or spherical free wave having a velocity of propagation v, the sound energy flux through the area S corresponding to an effective sound pressure p is For other meanings of medium, see Medium (disambiguation). ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... A wave crashing against the shore A wave is a disturbance that propagates. ... The flux visualized. ... Sound pressure p (or acoustic pressure) is the measurement in pascals of the root mean square (RMS) pressure deviation (from atmospheric pressure) caused by a sound wave passing through a fixed point. ...
J = ( p2S / ρv ) cos θ
where θ = the angle between the direction of propagation of the sound and the normal to the area S.
Sound can be described as a pressure disturbance that travels through the constituent particles of a medium: as one particle of the medium is perturbed by the pressure, it exerts a force on an adjacent particle, thus perturbing that particle in turn.
In solids however, sound may propagate as a transverse wave, i.e., a type of wave in which the displacement of the medium is perpendicular to the direction of propagation of the wave.
In conventional use and in scientific literature sound velocity, v, and sound speed, c, are used synonymously and should not be confused with soundparticle velocity (also symbolized as v), which is the velocity of the individual particles.
Stokes theorem states that the flux of the curl of a vector field is the line integral of the vector field over this boundary.
Except in the case of active transport, net flux is directly proportional to the concentration difference across the membrane, the surface area of the membrane, and the membrane permeability constant.
In ecology, flux is often considered at the ecosystem level - for instance, accurate determination of carbon fluxes (at a regional and global level) is essential for modeling the causes and consequences of global warming.
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