ISO 22897:2023

INTERNATIONAL ISO
STANDARD 22897
Second edition
2023-12
Glass in building — Glazing and
airborne sound insulation — Product
descriptions, determination of
properties and extension rules
Verre dans la construction — Vitrages et isolation aux bruits aériens
— Descriptions de produits, détermination des propriétés et règles
d'extension
Reference number
© ISO 2023
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Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 3
5 Glass products .3
5.1 Basic glasses . 3
5.2 Processed glasses . 3
5.2.1 Strengthened glasses . . . 3
5.2.2 Thermally toughened safety glasses . 3
5.2.3 Laminated glasses . 4
5.2.4 Coated glasses . 4
5.2.5 Insulating glass units . 4
5.2.6 Mirrors, painted glass, filmed glass, acid etched glass and sand blasted glass . 4
6 Test methods . 4
7 Sound insulation rating and classification . 4
7.1 Sound insulation rating . 4
7.2 Statement of acoustic performance of glass . 4
7.3 Specification of glazing requirements . 5
8 Extension rules .5
8.1 General . 5
8.2 Basic and special basic glasses . . 5
8.3 Surface treatments and coatings . 5
8.4 Laminated glass and laminated safety glass . 6
8.4.1 All types of laminated glass . 6
8.4.2 Laminated glass with acoustic polyvinyl butyral . 6
8.4.3 Laminated glass with non-acoustic polyvinyl butyral . 6
8.5 Insulating glass units . 6
8.6 Mirrors, painted glass, enamelled glass and filmed glass. 7
9 Typical performance data .7
Annex A (informative) Characterization of acoustic polyvinyl butyral interlayers .10
Bibliography .11
iii
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
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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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use
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www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 160, Glass in building.
This second edition cancels and replaces the first edition (ISO 22897:2003), which has been technically
revised.
The main changes are as follows:
— the calibration procedure has been removed and reference is now made to ISO 10140-1:2021,
Annex D;
— the extension rules have been expanded;
— Table 1 with typical performance data has been extended;
— Annex A on the characterization of polyvinyl butyral interlayers has been added.
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
INTERNATIONAL STANDARD ISO 22897:2023(E)
Glass in building — Glazing and airborne sound insulation
— Product descriptions, determination of properties and
extension rules
1 Scope
This document establishes a method to determine and assess sound insulation performances of all
transparent, translucent and opaque glass products, for basic, special basic or processed glass products,
when intended to be used in glazed assemblies in buildings, and which exhibit properties of acoustic
protection, either as a prime or supplementary characteristic.
This document refers to laboratory measurement method described in ISO 10140-1:2021, Annex D and
defines extension rules that can be applied without further testing. It also provides typical performance
data for a range of common glass products that can be used in the absence of measured data.
All the considerations of this document relate to panes of glass or glass products alone. Incorporation of
them into windows can cause changes in acoustic performance as a result of other influences, e.g. frame
design, frame material, glazing material or method, mounting method, air tightness. Measurements of
the sound insulation of complete windows (glass and frame) can be undertaken to resolve such issues.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 717-1, Acoustics — Rating of sound insulation in buildings and of building elements — Part 1: Airborne
sound insulation
ISO 10140-1:2021, Acoustics — Laboratory measurement of sound insulation of building elements — Part
1: Application rules for specific products
ISO 10140-2, Acoustics — Laboratory measurement of sound insulation of building elements — Part 2:
Measurement of airborne sound insulation
ISO 10140-3, Acoustics — Laboratory measurement of sound insulation of building elements — Part 3:
Measurement of impact sound insulation
ISO 10140-4, Acoustics — Laboratory measurement of sound insulation of building elements — Part 4:
Measurement procedures and requirements
ISO 10140-5, Acoustics — Laboratory measurement of sound insulation of building elements — Part 5:
Requirements for test facilities and equipment
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 717-1, ISO 10140 (all parts)
and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
glass product
product manufactured from glass, i.e. basic glass, special basic glass, processed glass, for use in
buildings and constructions
3.2
monolithic glass
single pane of glass, that includes annealed, strengthened or toughened (by heat or chemical treatment),
and coated glasses
Note 1 to entry: This term excludes laminated glass (3.4) and laminated safety glass (3.5).
3.3
insulating glass unit
IGU
assembly consisting of at least two panes of glass, separated by one or more spacers, hermetically
sealed along the periphery, mechanically stable and durable
3.4
laminated glass
assembly consisting of one sheet of glass with one or more sheets of glass and/or plastics glazing sheet
material joined together with one or more interlayers (3.6)
[SOURCE: ISO 12543-1:2021, 3.1.1, modified — Note 1 to entry has been deleted.]
3.5
laminated safety glass
laminated glass (3.4) classified in accordance with a soft body impact standard where in the case of
breakage the interlayer (3.6) serves to retain the glass fragments, limits the size of opening, offers
residual resistance and reduces the risk of cutting or piercing injuries
Note 1 to entry: In this document, the expression “laminated glass” covers both laminated glass and laminated
safety glass.
[SOURCE: ISO 12543-1:2021, 3.1.2, modified — Note 1 to entry has been replaced.]
3.6
interlayer
one or more layer or material acting as an adhesive and separator between panes of glass and/or
plastics glazing sheet material
[SOURCE: ISO 12543-1:2021, 3.2.7, modified — "plies" has been replaced with "panes" in the definition
and Notes 1 and 2 to entry have been deleted.]
3.7
acoustic interlayer
interlayer (3.6) that increases the sound reduction index of the laminated glass (3.4)
Note 1 to entry: The interlayer may be evaluated according to ISO 16940.
3.8
los
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