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8-12

characteristic impedance of a medium for longitudinal waves

URNurn:iso:std:iso:80000:-8:ed-1:en:item:8-12

https://metanorma.github.io/isq-smart/quantities/part-8/t8-12
urn:iso:std:iso:80000:-8:ed-1:en:item:8-12

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-8:ed-1:en:item:8-12

IEC

urn:iec:std:iec:80000-8:2020:::item:8-12

Designations

ENcharacteristic impedance of a medium for longitudinal waves

FRimpédance acoustique caractéristique d'un milieu pour des ondes longitudinales

Symbol

Z_{c}

Notation systems

Rendered

Z_{c}

AsciiMath

Z_"c"

LaTeX

Z_{\text{c}}

Definition

quotient of sound pressure (sound pressure) and the component of the sound particle velocity (sound particle velocity) in the direction of the wave propagation

quotient de la pression acoustique (sound pressure) par la composante de la vitesse acoustique d'une particule (sound particle velocity) dans la direction de propagation de l'onde

Units

P a \cdot \frac{s}{m}

pascal second per metre

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

kilogram per square metre second

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Notes

The definition is limited to a progressive plane wave in a non-dissipative homogenous gas or fluid.

Characteristic impedance is a property of the medium and is equal to $ρ c$ where $ρ$ is the time-averaged density (ISO 80000-4: Mechanics) of the medium and $c$ the phase speed of sound (ISO 80000-3: Space and time).

Longitudinal waves are waves in which the displacement of the medium is in the same direction as, or the opposite direction to, the direction of propagation of the wave.

La définition se limite à une onde plane progressive dans un milieu gazeux ou fluide homogène non dissipatif.

L'impédance acoustique caractéristique est une propriété du milieu et est égale à $ρ c$ où $ρ$ est la masse volumique (ISO 80000-4: Mechanics) moyenne du milieu et $c$ la vitesse de phase (ISO 80000-3: Space and time) du son.

Les ondes longitudinales sont des ondes dans lesquelles le déplacement du milieu est dans la même direction ou dans la direction opposée à la direction de propagation de l'onde.

Concept HierarchyPendrill (2024)

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

Broader concepts

◇ pressure-type quantities

Characterizes

● wave

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:t8-12

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	8-12
skosxl:prefLabel	"characteristic impedance of a medium for longitudinal waves"@en
skosxl:altLabel	"Z_"c""@en
skos:definition	quotient of sound pressure (<<t8-2.2>>) and the component of the sound particle velocity (<<t8-4>>) in the direction of …
skos:note	The definition is limited to a progressive plane wave in a non-dissipative homogenous gas or fluid. Characteristic impe…
isq:hasUnit	Pas/m (pascal second per metre)kgm^(-2)*s^(-1) (kilogram per square metre 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