GB/T 45305.3-2026Acoustics - Laboratory measurement of sound insulation of building elements - Part 3: Measurement of impact sound insulation (English PDF)

Foreword

This document is in accordance with GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting is scheduled.

This document is Part 3 of GB/T 45305, "Laboratory Measurement of Sound Insulation of Acoustic Building Components". GB/T 45305 has been published.

The following parts were included.

---Part 2: Measurement of Airborne Sound Insulation;

---Part 3: Impact Sound Insulation Measurement;

---Part 4: Measurement Procedures and Requirements;

---Part 5: Requirements for testing facilities and equipment.

This document replaces GB/T 19889.6-2005 "Acoustics of Buildings and Building Components - Measurement of Sound Insulation - Part 6: Impact Sound Insulation of Floors".

Compared with GB/T 19889.6-2005, the main technical changes in "Laboratory Measurements" are as follows, except for structural adjustments and editorial modifications.

---Test methods for alternative impact sources have been added (see Chapter 1, 5.2, and Appendix A);

---Added corrections for the effects of airborne sound transmission (see 5.4);

---The appendix on "Requirements for Standard Impactors" has been deleted and replaced with a normative reference to Appendix E of GB/T 45305.5-2026 (see Appendix E).

Chapter 4, 5.2 (Appendix A of GB/T 19889.6-2005)

---The appendix on "Measurement of Lateral Sound Transmission" has been deleted and replaced with Appendix A of GB/T 45305.5-2026 (see Appendix A).

Chapters 4 and 7, Appendix B of GB/T 19889.6-2005);

---The appendix on "Low-Frequency Band Measurement Guidelines" has been deleted and replaced with informative reference to Appendix A of GB/T 45305.4-2025 (see 5.1).

(Notes to A.4.3.3 and A.4.3.3, Appendix C of GB/T 19889.6-2005)

---The appendix on "Measurement of Total Loss Factor" has been deleted and replaced with informative reference to section 4.7 of GB/T 45305.4-2025 (see 6.2.1).

Chapter 9, Appendix D of GB/T 19889.6-2005.

This document is modified to adopt ISO 10140-3:2021 "Laboratory measurements of acoustic insulation of building components - Part 3: Impact sound insulation".

Measurement".

The technical differences between this document and ISO 10140-3:2021, and the reasons therefor, are as follows.

---ISO 10140-5:2021 has been replaced by the normatively referenced GB/T 45305.5-2026 (see Chapters 1, 4, 5.2, and 6).

2.1 (Chapter 7), to adapt to my country's technological conditions and increase operability;

---ISO 12999-1 (see Chapter 8) has been replaced with the normatively referenced GB/T 19889.2 to adapt to my country's technical conditions;

---ISO 10140-4:2021 (see 5.1, 5.3, 5.4, 6.2.1 and GB/T 45305.4-2025) has been replaced by the normatively referenced GB/T 45305.4-2025.

Chapter 9), to adapt to my country's technological conditions.

The following editorial changes have been made to this document.

---Added informative supplementary information (see note 5.1);

---Replace informative references IEC 60942, IEC 61260-1 and IEC 61672-1 in Appendix A with GB/T 15173.

GB/T 3241 (all parts) and GB/T 3785.1 are provided for ease of use;

---Informative reference document GB/T 50121 has been added (see 5.3, Chapter 9);

---Corrected a typographical error in paragraph 2 of A.2, removing the phrase "level 0";

---Corrected the typographical error in A.3; "see Chapter 5" has been changed to "see Chapter 6".

---Some references have been added.

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the Chinese Academy of Sciences.

This document is under the jurisdiction of the National Acoustics Standardization Technical Committee (SAC/TC17).

Introduction

GB/T 45305, "Laboratory Measurement of Sound Insulation of Acoustic Building Components," covers laboratory measurement methods for the sound insulation of building components, aiming to standardize...

Improve the layout of laboratory sound insulation measurements to ensure consistency and simplify the handling of variations in specimen installation conditions and the need for additional measurements.

The revision of the stoppage time will consist of five parts.

---Part 1: Application Rules for Specific Products. The aim is to provide appropriate testing methods for laboratory measurements of the sound insulation of specific components and products.

The procedure includes specific requirements for specimen preparation, installation, operation, and testing conditions.

---Part 2: Measurement of Airborne Sound Insulation. The purpose is to provide a general measurement procedure for measuring the airborne sound insulation of building components in a laboratory setting.

---Part 3: Impact Sound Insulation Measurement. The purpose is to provide a general measurement procedure for measuring the impact sound insulation of floor slab components in the laboratory.

---Part 4: Measurement Procedures and Requirements. The purpose is to provide laboratory measurement procedures for airborne and impact sound insulation of building components.

Basic measurement techniques and testing procedures.

---Part 5: Requirements for Testing Facilities and Equipment. The purpose is to provide guidelines for the design, construction, and qualification of sound insulation measurement laboratory testing facilities.

Detailed information required for application, additional devices, and measuring instruments and equipment.

Laboratory measurements of sound insulation of acoustic building components Part 3: Impact Sound Insulation Measurement

1 Scope

This document describes a laboratory method for determining the impact sound insulation performance of floor slab components using sound pressure measurement.

The measurement results are used for comparing and classifying the impact sound insulation performance of floor slabs, which helps in designing building products with certain sound insulation properties.

Estimate the on-site sound insulation performance of the building after completion.

The measurements in this document were conducted in a laboratory testing facility with suppressed lateral sound transmission. The results are not directly applicable to field conditions.

This does not take into account other factors that affect sound insulation on-site, such as lateral sound transmission, boundary conditions, and loss factor.

This document specifies the test method using a standard impactor (see Appendix E of GB/T 45305.5-2026) as the impact source.

The impactor simulates the impact of a footstep from a person wearing shoes. This document also provides testing methods for alternative impact sources, namely, using a modified impactor or heavy...

Soft impact sources (see Appendix F of GB/T 45305.5-2026) are used to simulate impacts with strong low-frequency components, such as those from barefoot walking or children.

The impact of the child jumping.

This document applies to the measurement of all types of floor slab components, whether heavy or lightweight, and including all types of floor slab coverings.

This applies to all floor slabs. The measurement methods specified in this document are only applicable to laboratory measurements.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 19889.2 Acoustic Measurement of Sound Insulation in Buildings and Building Components – Part 2: Evaluation and Application of Measurement Uncertainty (GB/T 19889.2-2022,ISO 12999-1:2020,MOD) GB/T 45305.4-2025 Laboratory Measurement of Sound Insulation of Acoustic Building Components - Part 4: Measurement Procedures and Requirements (ISO 10140-4:2021, MOD) Note. There are no technical differences between the content referenced in GB/T 45305.4-2025 and the content referenced in ISO 10140-4:2021.

GB/T 45305.5-2026 Laboratory Measurement of Sound Insulation of Acoustic Building Components - Part 5: Requirements for Test Facilities and Equipment (ISO 10140-5:2021, MOD) Note. The content referenced in GB/T 45305.5-2026 is not technically different from the content referenced in ISO 10140-5:2021.

ISO 10140-1:2021 Laboratory measurement of sound insulation of building components – Part 1: Application rules for specific products (Acoustic-specific products)

3 Terms and Definitions

The following terms and definitions apply to this document.

The URLs for the terminology databases maintained by ISO and IEC for standardization are as follows.