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8-4

sound particle velocity

URNurn:iso:std:iso:80000:-8:ed-1:en:item:8-4

https://metanorma.github.io/isq-smart/quantities/part-8/t8-4
urn:iso:std:iso:80000:-8:ed-1:en:item:8-4

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-8:ed-1:en:item:8-4

IEC

urn:iec:std:iec:80000-8:2020:::item:8-4

Designations

ENsound particle velocity

FRvitesse acoustique d'une particule

Symbol

u

(ν)

Notation systems

Rendered

u

Rendered

(ν)

AsciiMath

bb(ii(u))

AsciiMath

(bb(ii(nu)))

LaTeX

\mathbf{\mathit{u}}

LaTeX

( \mathbf{\mathit{\nu}} )

Definition

vector (ISO 80000-2: Mathematics) quantity given by:

u = \frac{\partial δ}{\partial t}

where $δ$ is sound particle displacement (sound particle displacement) and $t$ is time (ISO 80000-3: Space and time)

grandeur vectorielle donnée par:

u = \frac{\partial δ}{\partial t}

où $δ$ est l'élongation d'une particule (sound particle displacement) et $t$ est le temps (ISO 80000-3: Space and time)

Units

m \cdot s^{- 1}

metre per second

View related quantities →

Notes

The definition is limited to small-amplitude acoustic disturbances such that the magnitude of $u$ is small relative to the phase speed (ISO 80000-3: Space and time) of sound.

La définition se limite aux perturbations acoustiques de faible amplitude telles que la norme de $u$ soit petite par rapport à la vitesse de phase (ISO 80000-3: Space and time) du son.

Referenced by

sound particle acceleration volume velocity sound energy density sound power sound intensity characteristic impedance of a medium for longitudinal waves

Concept HierarchyPendrill (2024)

L T⁻¹velocity-type quantitiesLevel 0 · Kind

Broader concepts

◇ velocity-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:t8-4

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	8-4
skosxl:prefLabel	"sound particle velocity"@en
skosxl:altLabel	"bb(ii(u))"@en"(bb(ii(nu)))"@en
skos:definition	vector (<<iso80000-2>>) quantity given by: [stem%unnumbered] ++++ bb(ii(u)) = (del bb(ii(delta)))/(del t) ++++ where s…
skos:note	The definition is limited to small-amplitude acoustic disturbances such that the magnitude of stem:[bb(ii(u))] is small …
isq:hasUnit	m*s^(-1) (metre per second)
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