ISO 10140-5:2021 Acoustics — Laboratory measurement of sound insulation of building elements —Part 5: Requirements for test facilities and equipment

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Acoustics — Laboratory measurement of sound insulation of building elements —Part 5: Requirements for test facilities and equipment是国际标准化组织(International Organization for Standardization，简称ISO)发布的ISO标准，适用于世界范围。

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Acoustics — Laboratory measurement of sound insulation of building elements —

Part 5: Requirements for test facilities and equipment

1 Scope

This document specifies laboratory test facilities and equipment for sound insulation measurements of building elements, such as:

— components and materials;

— building elements;

— technical elements (small building elements);

— sound insulation improvement systems.

It is applicable to laboratory test facilities with suppressed radiation from flanking elements and structural isolation between source and receiving rooms.

This document specifies qualification procedures for use when commissioning a new test facility with equipment for sound insulation measurements. It is intended that these procedures be repeated periodically to ensure that there are no issues with the equipment and the test facility.

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 3382-2, Acoustics — Measurement of room acoustic parameters — Part 2: Reverberation time in ordinary rooms

ISO 9052-1:1989, Acoustics — Determination of dynamic stiffness — Part 1: Materials used under floating 

floors in dwellings

ISO 10140-1, 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

IEC 60942:2017, Electroacoustics — Sound calibrators

IEC 61260-1, Electroacoustics — Octave-band and fractional-octave-band filters — Part 1: Specifications

IEC 61672-1, Electroacoustics — Sound level meters — Part 1: Specifications

IEC 61672-2, Electroacoustics — Sound level meters — Part 2: Pattern evaluation tests

IEC 61672-3, Electroacoustics — Sound level meters — Part 3: Periodic tests

3 Terms a nd definiti ons

No terms and definitions are listed in this document.

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.e lectropedia .org/ 4 Laboratory test facilities for airborne sound insulation measurements

4.1 General

The laboratory test facility shall consist of two adjacent reverberant rooms with a test opening between them, in which the test element is inserted.

The area of the test opening can vary depending on the type of test element. This document defines full-sized test openings, a specific small-sized test opening and alternative reduced-size test openings.

For measurement of the improvement of sound reduction index by acoustical linings, these rooms shall be separated by a standard basic element on which the lining under test is installed, in accordance with Annex B.

4.2 Test rooms

4.2.1 Volume

3

The volumes of the test rooms shall be at least 50 m . Volumes and corresponding dimensions of the two test rooms should not be exactly the same. A difference of at least 10 % in room volumes and in the linear dimensions is recommended.

Choose the ratios of the room dimensions such that the eigenmode frequencies in the low-frequency bands are spaced as uniformly as possible.

When measuring the sound insulation of walls or floors, theoretical calculation as well as experiments have indicated that the test element should cover a total partition wall or ceiling of the test room, i.e. the test opening should extend from wall to wall and from floor to ceiling. In such a case, a volume of 3 3

50 m to 60 m is appropriate in view of the recommended size of the test opening.

4.2.2 Diffusion

Large variations of the sound pressure level in the room indicate the presence of dominating strong standing waves. In this case, diffusing elements shall be installed in the rooms. The positioning and number of diffusing elements should be arranged in such a way that the sound reduction index is not influenced when further diffusing elements are installed.

NOTE For some kinds of test element, as for elements with one surface significantly more absorbent than the other (see ISO 10140-2), the installation of diffusing elements is mandatory.

4.2.3 Reverberation time

The reverberation time in the rooms under normal test conditions (with negligible absorption by the test element) should not be excessively long or short. When the reverberation time at frequencies at

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