The sound energy density or sound density (symbol E or w) is an adequate measure to describe the sound field at a given point as a sound energy value. The letter "lower case w" sign w is easily mixed with the sign ω (omega), therefore we choose here the letter E. 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. ... Sound pressure level (SPL) or sound level Lp is a logarithmic measure of a particular noise relative to a reference noise source. ... Particle velocity is the velocity v of a particle (real or imagined) in a medium as it transmits a wave. ... The particle velocity level or the sound velocity level tells the ratio of a sound incidence in comparison to a reference level of 0 dB. It shows the ratio of the particle velocity v1 and the particle velocity v0. ... Particle displacement or particle amplitude (represented in mathematics by the lower-case Greek letter ξ) is a measurement of distance (in metres) of the movement of a particle in a medium as it transmits a wave. ... The sound intensity, I, (acoustic intensity) is defined as the sound power Pac per unit area A. The usual context is the measurement of sound intensity in the air at a listeners location. ... Sound intensity level or acoustic intensity level is a logarithmic measure of the sound intensity in comparison to the reference level of 0 dB (decibels). ... Sound power or acoustic power Pac is a measure of sonic energy E per time t unit. ... Sound power level or acoustic power level is a logarithmic measure of the sound power in comparison to the reference level of 0 dB (decibels). ... The sound energy flux is the average rate of flow of sound energy for one period through any specified area. ... The acoustic impedance Z (or sound impedance) is the ratio of sound pressure p to particle velocity v in a medium or acoustic component. ... The speed of sound c (from Latin celeritas, velocity) varies depending on the medium through which the sound waves pass. ...

In opposite to the sound intensity I, which gives the sound energy per area A, the sound energy density E (also: sound density) describes the time medium value of the sound energy per volume unit; it gives information obout the sound energy which is at a definded place of room.

The sound energy density E (or w) for a even-proceeding sound wave is: This article is about compression waves. ...

,

where I is the sound intensity in W/m² and c is the sound speed in m/s.
The sound energy density is given in J/m³, where the joule J = W·s = N·m.
You will find also W·s/m³ or N·m/m³.
The sound energy density is N/m² = pascals, the same as the units of sound pressure. The sound intensity, I, (acoustic intensity) is defined as the sound power Pac per unit area A. The usual context is the measurement of sound intensity in the air at a listeners location. ... The speed of sound varies depending on the medium through which the sound waves pass. ...

The terms instantaneous energy density, maximum energy density, and peak energy density have meanings analogous to the related terms used for sound pressure. In speaking of average energy density in general, it is necessary to distinguish between the space average (at a given instant) and the time average (at a given point).

More formulas for sound energy density for even proceeding sound waves:

where:

For digits of the sound energy density the RMS value will be given.
But you get also the level in dB. See sound energy density level. The pascal (symbol Pa) is the SI unit of pressure. ... 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. ... The hertz (symbol Hz) is the SI unit of frequency. ... Sine waves of various frequencies; the lower waves have higher frequencies than those above. ... The metre, or meter (symbol: m) is the SI base unit of length. ... Particle displacement or particle amplitude (represented in mathematics by the lower-case Greek letter ξ) is a measurement of distance (in metres) of the movement of a particle in a medium as it transmits a wave. ... The metre, or meter (symbol: m) is the SI base unit of length. ... Look up Second in Wiktionary, the free dictionary The second (symbol: s) is the SI base unit of time. ... The speed of sound c (from Latin celeritas, velocity) varies depending on the medium through which the sound waves pass. ... Metre per second (U.S. spelling: meter per second) is an SI derived unit of both speed (scalar) and velocity (vector), defined by distance in metres divided by time in seconds. ... Particle velocity is the velocity v of a particle (real or imagined) in a medium as it transmits a wave. ... In mathematics and physics, the radian is a unit of angle measure. ... Look up Second in Wiktionary, the free dictionary The second (symbol: s) is the SI base unit of time. ... Angular frequency is a measure of how fast an object is rotating In physics (specifically mechanics and electrical engineering), angular frequency ω (also called angular speed) is a scalar measure of rotation rate. ... The international prototype, made of platinum-iridium, which is kept at the BIPM under conditions specified by the 1st CGPM in 1889. ... The metre, or meter (symbol: m) is the SI base unit of length. ... The density of air, ρ (Greek: rho) (air density), is the mass per volume of Earths atmosphere, and is a useful value in aeronautics. ... The newton (symbol: N) is the SI unit of force. ... Look up Second in Wiktionary, the free dictionary The second (symbol: s) is the SI base unit of time. ... The metre, or meter (symbol: m) is the SI base unit of length. ... The acoustic impedance Z (or sound impedance) is the ratio of sound pressure p to particle velocity v in a medium or acoustic component. ... The metre, or meter (symbol: m) is the SI base unit of length. ... Look up Second in Wiktionary, the free dictionary The second (symbol: s) is the SI base unit of time. ... 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. In acoustics or physics, acceleration (symbol: a) is defined as the rate of change (or time derivative) of velocity. ... The watt (symbol: W) is the SI derived unit of power. ... The sound intensity, I, (acoustic intensity) is defined as the sound power Pac per unit area A. The usual context is the measurement of sound intensity in the air at a listeners location. ... The watt (symbol: W) is the SI derived unit of power. ... Look up Second in Wiktionary, the free dictionary The second (symbol: s) is the SI base unit of time. ... The metre, or meter (symbol: m) is the SI base unit of length. ... The watt (symbol: W) is the SI derived unit of power. ... Sound power or acoustic power Pac is a measure of sonic energy E per time t unit. ... Sound power or acoustic power is a measure of sonic energy E per time t unit. ... The metre, or meter (symbol: m) is the SI base unit of length. ... -1... RMS may mean: root mean square, a concept in statistics and electronics Richard M. Stallman, a computer programmer and founder of the GNU project. ... Level has more than one meaning. ... DB or db or dB may stand for: Database, an organized collection of data DB (car), a French automobile maker Decibel (dB), the ratio between two quantities, used in acoustics and electronics Deutsche Bahn, the major German railway company Deutsche Bank, a German bank Discovery Bay, a residential development in... The Sound energy density level gives the ratio of a sound incidence Schallenergiegröße in comparison with a reference level of 0 dB (DIN 45630). ...

See also

• Particle displacement | Particle amplitude | Sound velocity | Particle acceleration | Sound pressure | Sound intensity | Sound power |

Or the level: Particle displacement or particle amplitude (represented in mathematics by the lower-case Greek letter ξ) is a measurement of distance (in metres) of the movement of a particle in a medium as it transmits a wave. ... Particle displacement or particle amplitude ξ is a distance measurement in m (metre) of the movement of a particle(real or imagined) in a medium as it transmits a wave. ... Sound velocity is in conventional use in scientific literature the same as sound speed. ... 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. In acoustics or physics, acceleration (symbol: a) is defined as the rate of change (or time derivative) of velocity. ... 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. ... The sound intensity, I, (acoustic intensity) is defined as the sound power Pac per unit area A. The usual context is the measurement of sound intensity in the air at a listeners location. ... Sound power or acoustic power Pac is a measure of sonic energy E per time t unit. ...

• Sound pressure level | Sound velocity level | Sound intensity level | Sound power level | Sound energy density level |

Sound pressure level (SPL) or sound level Lp is a logarithmic measure of a particular noise relative to a reference noise source. ... The Sound velocity level or the particle velocity level tells the ratio of a sound incidence in comparison to a reference level of 0 dB. It shows the ratio of the sound velocity v1 and the sound velocity v0. ... Sound intensity level or acoustic intensity level is a logarithmic measure of the sound intensity in comparison to the reference level of 0 dB (decibels). ... Sound power level or acoustic power level is a logarithmic measure of the sound power in comparison to the reference level of 0 dB (decibels). ... The Sound energy density level gives the ratio of a sound incidence Schallenergiegröße in comparison with a reference level of 0 dB (DIN 45630). ...

External links

• Conversion: sound intensity to sound intensity level
  
• Ohm's law of the acoustics - calculations
• Connection of acoustic sizes for even progressive acoustic waves