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8-7

sound energy density

URNurn:iso:std:iso:80000:-8:ed-1:en:item:8-7

https://metanorma.github.io/isq-smart/quantities/part-8/t8-7
urn:iso:std:iso:80000:-8:ed-1:en:item:8-7

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-8:ed-1:en:item:8-7

IEC

urn:iec:std:iec:80000-8:2020:::item:8-7

Designations

ENsound energy density

FRénergie volumique acoustique

Symbol

w

Notation systems

Rendered

w

AsciiMath

w

LaTeX

w

Definition

quantity given by:

w = \frac{1}{2} ρ_{m} u^{2} + \frac{1}{2} \frac{p^{2}}{ρ_{m} c^{2}}

where $ρ_{m}$ is mean density (ISO 80000-4: Mechanics), $u$ is the magnitude of the sound particle velocity (sound particle velocity), $p$ is sound pressure (sound pressure), and $c$ is the phase speed (ISO 80000-3: Space and time) of sound

grandeur donnée par:

w = \frac{1}{2} ρ_{m} u^{2} + \frac{1}{2} \frac{p^{2}}{ρ_{m} c^{2}}

où $ρ_{m}$ est la masse volumique (ISO 80000-4: Mechanics) moyenne, $u$ est la norme de la vitesse acoustique d'une particule (sound particle velocity), $p$ est la pression acoustique (sound pressure) et $c$ est la vitesse de phase (ISO 80000-3: Space and time) du son

Units

\frac{J}{m^{3}}

joule per cubic metre

View related quantities →

k g \cdot m^{- 1} \cdot s^{- 2}

kilogram per metre second squared

View related quantities →

Notes

This definition can become inapplicable in situations with a high mean fluid flow.

Cette définition peut devenir inapplicable en cas d'écoulement moyen élevé de fluide.

Referenced by

sound energy reverberation time

Concept HierarchyPendrill (2024)

L⁻¹ M T⁻²pressure-type quantitiesLevel 0 · Kind

Broader concepts

◇ pressure-type quantities

Ontology
isq:Quantity smart:TermEntry

Class Hierarchy

smart:Entity smart:TermEntryisq:Quantity

A physical quantity as defined in ISO/IEC 80000, with associated symbols, definitions, and units of measurement.

Instance IRI

isq:t8-7

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	8-7
skosxl:prefLabel	"sound energy density"@en
skosxl:altLabel	"w"@en
skos:definition	quantity given by: [stem%unnumbered] ++++ w = 1/2 rho_"m" u^2 + 1/2 p^2/(rho_"m" c^2) ++++ where stem:[rho_"m"] is mea…
skos:note	This definition can become inapplicable in situations with a high mean fluid flow.
isq:hasUnit	J/m^3 (joule per cubic metre)kgm^(-1)s^(-2) (kilogram per metre second squared)
isq:hasDimension	isq:Dimension
smart:hasBindingnessType	bindingness-type:normative
dcterms:isPartOf	isq:part-8

Related Entities

isq:QuantityShape isq:part-8 isq:Unit isq:Dimension isq:hasDimension smart:TermEntry