EN ISO 80000-8:2020
(Main)Quantities and units - Part 8: Acoustics (ISO 80000-8:2020)
Quantities and units - Part 8: Acoustics (ISO 80000-8:2020)
This document gives names, symbols, definitions and units for quantities of acoustics. Where appropriate, conversion factors are also given.
Größen und Einheiten - Teil 8: Akustik (ISO 80000-8:2020)
Dieses Dokument enthält Namen, Zeichen, Definitionen und Einheiten für Größen der Akustik. Wo benötigt, sind auch Umrechnungsfaktoren aufgeführt.
Grandeurs et unités - Partie 8: Acoustique (ISO 80000-8:2020)
Le présent document donne les noms, les symboles, les définitions et les unités des grandeurs d'acoustique. Des facteurs de conversion sont également indiqués, s'il y a lieu.
Veličine in enote - 8. del: Akustika (ISO 80000-8:2020)
General Information
Relations
Related Packages
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2020
Nadomešča:
SIST EN ISO 80000-8:2007
SIST ISO 80000-8:2012
Veličine in enote - 8. del: Akustika (ISO 80000-8:2020)
Quantities and units - Part 8: Acoustics (ISO 80000-8:2020)
Größen und Einheiten - Teil 8: Akustik (ISO 80000-8:2020)
Grandeurs et unités - Partie 8: Acoustique (ISO 80000-8:2020)
Ta slovenski standard je istoveten z: EN ISO 80000-8:2020
ICS:
01.060 Veličine in enote Quantities and units
17.140.01 Akustična merjenja in Acoustic measurements and
blaženje hrupa na splošno noise abatement in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 80000-8
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2020
EUROPÄISCHE NORM
ICS 01.060 Supersedes EN ISO 80000-8:2007
English Version
Quantities and units - Part 8: Acoustics (ISO 80000-
8:2020)
Grandeurs et unités - Partie 8: Acoustique (ISO 80000- Größen und Einheiten - Teil 8: Akustik (ISO 80000-
8:2020) 8:2020)
This European Standard was approved by CEN on 17 February 2020.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
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COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 80000-8:2020 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 80000-8:2020) has been prepared by Technical Committee ISO/TC 12
"Quantities and units" in collaboration with Technical Committee CEN/SS F02 “Units and symbols” the
secretariat of which is held by CCMC.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2020, and conflicting national standards
shall be withdrawn at the latest by September 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 80000-8:2007.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 80000-8:2020 has been approved by CEN as EN ISO 80000-8:2020 without any
modification.
INTERNATIONAL ISO
STANDARD 80000-8
Second edition
2020-02
Quantities and units —
Part 8:
Acoustics
Grandeurs et unités —
Partie 8: Acoustique
Reference number
ISO 80000-8:2020(E)
©
ISO 2020
ISO 80000-8:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
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Published in Switzerland
ii © ISO 2020 – All rights reserved
ISO 80000-8:2020(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Remark on the use of the symbols lb and lg . 1
Bibliography . 8
Alphabetical index . 9
ISO 80000-8:2020(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 12, Quantities and units, in collaboration
with IEC/TC 25, Quantities and units.
This second edition cancels and replaces the first edition (ISO 80000-8:2007), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— the table giving the quantities and units has been simplified;
— some definitions and the remarks have been stated physically more precisely.
A list of all parts in the ISO 80000 and IEC 80000 series can be found on the ISO and IEC websites.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
INTERNATIONAL STANDARD ISO 80000-8:2020(E)
Quantities and units —
Part 8:
Acoustics
1 Scope
This document gives names, symbols, definitions and units for quantities of acoustics. Where
appropriate, conversion factors are also given.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
Names, symbols, definitions and units for quantities used in acoustics are given in Table 1.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
sound particle
material element
smallest element of the medium that represents the medium’s mean density
[SOURCE: ISO 18405:2017, 3.1.1.5, modified - Note 1 to entry deleted.]
4 Remark on the use of the symbols lb and lg
In accordance with ISO 80000-2, the abbreviations lb and lg are used to indicate logarithms to the base
2 (log ) and base 10 (log ), respectively.
2 10
ISO 80000-8:2020(E)
2 © ISO 2020 – All rights reserved
Table 1 — Quantities and units used in acoustics
Item No. Quantity Unit Remarks
Name Symbol Definition
8-1 logarithmic G quantity given by: oct One octave (oct) is the logarithmic frequency
frequency range range between f and f when
1 2
f f dec
2 2
G==lb octdlg ec
f
f f
=2 . Similarly, one decade (dec) is the
1 1
f
where f and f are two frequencies (ISO 80000-3)
1 2
logarithmic frequency range between f and f
1 2
when
f
=10 ; thus 1 dec = (lb 10) oct ≈ 3,322 oct.
f
ISO 266 specifies preferred frequencies for
acoustics separated by logarithmic frequency
ranges equal to one tenth of a decade (0,1 dec).
Each 0,1 dec logarithmic frequency range is
referred to in ISO 266 as a "one-third-octave
interval" because 0,1 dec is approximately equal
to 1/3 oct. Similarly, a logarithmic frequency
range of 0,3 dec is referred to as a "one-octave
interval" because 0,3 dec is approximately equal
to 1 oct.
A logarithmic frequency range equal to one tenth
of a decade can be referred to as a decidecade.
8-2.1 static pressure p pressure (ISO 80000-4) in a medium when no Pa This definition applies to a medium with zero
s
sound wave is present flow.
-1 -2
kg m s
8-2.2 sound pressure p difference between instantaneous total pressure Pa
and static pressure (item 8-2.1)
−1 −2
kg m s
8-3 sound particle δ vector (ISO 80000-2) quantity giving the instan- m
displacement taneous displacement (ISO 80000-3) of a particle
in a medium from what would be its position in
the absence of sound waves
−1
8-4 sound particle u, (v) vector (ISO 80000-2) quantity given by: m s The definition is limited to small-amplitude
velocity acoustic disturbances such that the magnitude
∂δδ
of u is small relative to the phase speed (ISO
u=
∂t
80000-3) of sound.
where δ is sound particle displacement (item 8-3)
and t is time (ISO 80000-3)
ISO 80000-8:2020(E)
Table 1 (continued)
Item No. Quantity Unit Remarks
Name Symbol Definition
−2
8-5 sound particle a vector (ISO 80000-2) quantity given by: m s The definition is limited to small-amplitude
acceleration acoustic disturbances such that the magnitude
∂u
of the sound particle velocity is small relative to
a=
∂t
the phase speed (ISO 80000-3) of sound.
where u is sound particle velocity (item 8-4) and
t is time
3 −1
8-6 volume velocity q, q surface integral of the normal component of m s
v
the sound particle velocity (item 8-4) over a
volume flow rate
defined surface
8-7 sound energy density w quantity given by: J/m This definition can become inapplicable in situa-
tions with a high mean fluid flow.
−1 −2
kg m s
1 1 p
wu=+ρ
m
2 2
ρ c
m
where ρ is mean density (ISO 80000-4), u is the
m
magnitude of the sound particle velocity (item
8-4), p is sound pressure (item 8-2.2), and c is the
phase speed (ISO 80000-3) of sound
8-8 sound energy Q integral of sound energy density (item 8-7) over a J The sound energy in region R can be ex-
specified volume pressed by:
2 −2
kg m s
Qw= ()xxd
∫
R
where d x is an element of volume.
8-9 sound power P, W integral over a surface of the product of sound W This definition holds for waves in the volume of
pressure, p (item 8-2.2), and the component u of homogenous fluids or gases.
n 2 −3
kg m s
the particle velocity (item 8-4) in the direction
This definition can become i
...
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