Sound energy density
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 is easily mixed with the sign (omega), therefore we choose the letter "E".
In opposite to the
sound intensity "I", which gives the sound power 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 about the sound energy which is at a defined place in the room.The sound energy density "E" (or "w") for an even-proceeding
sound wave is::,where "I" is the sound intensity in W/m2 and "c" is thesound 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 unit of measurement for sound energy density is N/m2, also known as pascals, the same as the units of sound pressure.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, 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 thelevel in dB. Seesound energy density level .See also
*
Particle displacement
*Sound velocity
*Particle acceleration
*Sound pressure
*Sound intensity
*Sound power
*Particle velocity level
*Sound intensity level
*Sound power level
*Sound energy density level External links
* [http://www.sengpielaudio.com/calculator-soundlevel.htm Conversion: sound intensity to sound intensity level]
* [http://www.sengpielaudio.com/calculator-ak-ohm.htm Ohm's law as acoustic equivalent - calculations]
* [http://www.sengpielaudio.com/RelationshipsOfAcousticQuantities.pdf Relationships of acoustic quantities associated with a plane progressive acoustic sound wave - pdf]
Wikimedia Foundation. 2010.
Look at other dictionaries:
sound energy density — tūrinis garso energijos tankis statusas T sritis Standartizacija ir metrologija apibrėžtis Vidutinė tam tikro tūrio garso energija, padalyta iš to tūrio. atitikmenys: angl. sound energy density; volumic sound energy vok. Schalldichte, f;… … Penkiakalbis aiškinamasis metrologijos terminų žodynas
sound energy density — tūrinis garso energijos tankis statusas T sritis fizika atitikmenys: angl. sound energy density; volumic sound energy vok. Schallenergiedichte, f rus. плотность звуковой энергии, f pranc. densité d’énergie acoustique, f … Fizikos terminų žodynas
sound-energy density — garso energijos tankis statusas T sritis fizika atitikmenys: angl. sound energy density vok. Schalldichte, f; Schallenergiedichte, f rus. плотность звуковой энергии, f pranc. densité d’énergie acoustique, f; densité d’énergie sonore, f … Fizikos terminų žodynas
Sound energy density level — The sound energy density level gives the ratio of a sound incidence as a sound energy value in comparison to a reference level of 0 dB (DIN 45630). It is a logarithmic measure of the ratio of two sound energy densities. Definition The sound… … Wikipedia
volumic sound energy — tūrinis garso energijos tankis statusas T sritis Standartizacija ir metrologija apibrėžtis Vidutinė tam tikro tūrio garso energija, padalyta iš to tūrio. atitikmenys: angl. sound energy density; volumic sound energy vok. Schalldichte, f;… … Penkiakalbis aiškinamasis metrologijos terminų žodynas
volumic sound energy — tūrinis garso energijos tankis statusas T sritis fizika atitikmenys: angl. sound energy density; volumic sound energy vok. Schallenergiedichte, f rus. плотность звуковой энергии, f pranc. densité d’énergie acoustique, f … Fizikos terminų žodynas
Sound pressure — Sound measurements Sound pressure p, SPL Particle velocity v, SVL Particle displacement ξ Sound intensity I, SIL Sound power Pac Sound power level SWL Sound energy Sound energy d … Wikipedia
Sound — This article is about audible acoustic waves. For other uses, see Sound (disambiguation). In a drum sound is produ … Wikipedia
sound reception — Introduction response of an organism s aural mechanism, the ear, to a specific form of energy change, or sound waves. Sound waves can be transmitted through gases, liquids, or solids, but the hearing function of each species is particularly … Universalium
Energy — This article is about the scalar physical quantity. For other uses, see Energy (disambiguation). Energetic redirects here. For other uses, see Energetic (disambiguation) … Wikipedia
