GB/T 45305.5-2026Acoustics - Laboratory measurement of sound insulation of building elements - Part 5: Requirements for test facilities and equipment (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

This document is Part 5 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 19889.1-2005 "Acoustics of Buildings and Building Components - Measurement of Sound Insulation - Part 1: Suppression of Lateral Sound Transmission".

The "Requirements for Laboratory Testing Facilities" has undergone significant technical changes compared to GB/T 19889.1-2005, except for structural adjustments and editorial modifications.

as follows.

---The appendix on "Measurement of sound insulation of grout walls (and all lateral wall structures) for window and glass installation openings" has been deleted (see Appendix 1).

Appendix B of GB/T 19889.1-2005

---The appendix on "Specific requirements for the sound insulation test opening structure of double-layer lightweight panel partition walls" has been deleted (see GB/T 19889.1-2005).

Appendix D) incorporates the requirements for the sound insulation test frame of double-layer lightweight panel partition walls into 4.3.2.3;

---Added requirements for small-sized and specific-sized test openings in airborne sound insulation measurements (see 4.3.3, 4.3.4);

---Requirements for sound insulation testing equipment have been added (see Chapter 6);

--- An appendix entitled "Standard Basic Components for Measuring the Airborne Sound Insulation Improvement of Acoustic Liners" has been added (see Appendix B);

--- An appendix entitled "Standard Floor Slabs for Measuring Impact Sound Improvement in Floor Coverings" has been added (see Appendix C);

--- An appendix entitled "Technical Requirements for Loudspeakers and Loudspeaker Locations" has been added (see Appendix D);

--- An appendix, "Standard Impactors," has been added (see Appendix E).

--- An appendix entitled "Alternative Impact Sound Sources" has been added (see Appendix F);

--- An appendix entitled "Wooden Model Floor Slab in Measuring Impact Sound Improvement of Floor Covering" has been added (see Appendix G);

--- An appendix entitled "Specifications for Heavy Rain and Torrential Rain - Example of a Perforated Bottom Gutter" has been added (see Appendix H).

This document is modified to adopt ISO 10140-5:2021 "Acoustic building components - Laboratory measurement of sound insulation - Part 5: Test facilities and equipment".

Requirements.

The technical differences between this document and ISO 10140-5:2021, and the reasons therefor, are as follows.

---ISO 10140-2 (see 4.2.2, 4.3.3, A.2.1) has been replaced with the normatively referenced GB/T 45305.2 to adapt to my country's technical standards.

Technical requirements;

---IEC 61672-1 (see 6.3) has been replaced with the normatively referenced GB/T 3785.1 to accommodate my country's technical requirements;

---IEC 61260-1 (see 6.3) has been replaced with the normatively referenced GB/T 3241 to meet my country's technical requirements;

---IEC 61672-2 (see 6.3) has been replaced with the normatively referenced GB/T 3785.2 to accommodate my country's technical requirements;

---IEC 61672-3 (see 6.3) has been replaced with the normatively referenced GB/T 3785.3 to accommodate my country's technical requirements;

---ISO 10140-1 has been replaced with ISO 10140-1:2021 (see 6.2, H.1) due to the specific clauses cited in the text.

The content.

The following editorial changes have been made to this document.

---Corrected a typographical error in the first paragraph of section 6.3 by removing the level "0";

---The attachment information regarding obtaining a type evaluation certificate for measuring instruments has been removed (see note 6.3);

---Added informative supplementary information, listing the "bottom-perforated water pipe array" as an optional device for rain noise measurement (see H.1).

Note);

---The unit of measurement in Figure H.1 has been changed to millimeters (mm);

---An informative appendix, "Bottom Perforated Water Pipe Arrays in Simulated Rainfall Generation Systems," has been added (see Appendix J);

---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 5: Requirements for Testing Facilities and Equipment

1 Scope

This document specifies the technical requirements for testing facilities and equipment used in laboratory measurements of sound insulation in building components, for example.

---Composition and materials;

---Architectural components;

---Equipment parts (small building components);

---Sound insulation improvement system.

This document outlines the qualification procedures for sound insulation testing facilities and equipment. These procedures are repeated periodically to ensure the equipment and testing facilities are in good working order.

Under normal conditions.

This document applies to laboratory testing facilities and equipment where lateral acoustic radiation is suppressed and where the receiving chamber and sound source chamber are structurally isolated.

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 3241.1 Electroacoustic octave and fractional octave filters – Part 1: Specifications (GB/T 3241.1-2025, IEC) 61260-1.2014, IDT) GB/T 3785.1 Electroacoustic sound level meters – Part 1: Specifications (GB/T 3785.1-2023, IEC 61672-1:2013, IDT) GB/T 3785.2 Electroacoustic sound level meters – Part 2: Type evaluation tests (GB/T 3785.2-2023, IEC 61672-2) 2013, IDT) GB/T 3785.3 Electroacoustic sound level meters – Part 3: Periodic testing (GB/T 3785.3-2018, IEC 61672-3) 2013, IDT) GB/T 35426.1-2017 Acoustic dynamic stiffness determination—Part 1: Elastic materials under ordinary floating floors (ISO 9052-1.

1989, IDT)

GB/T 36075.2 Acoustics - Measurement of acoustic parameters in indoor spaces - Part 2: Reverberation time of ordinary rooms (GB/T 36075.2-2018, ISO 3382-2:2008, IDT) GB/T 45305.2 Laboratory measurement of sound insulation of acoustic building components - Part 2: Measurement of airborne sound insulation (GB/T 45305).

ISO 10140-2:2021 (2-2025, ISO 10140-2:2021, MOD) GB/T 45305.3-2026 Laboratory measurements of sound insulation in building acoustic components – Part 3: Measurement of impact sound insulation (ISO 10140-3:2021, MOD) Note. The content referenced in GB/T 45305.3-2026 is not technically different from the content referenced in ISO 10140-3:2021.

GB/T 45305.4-2025 Laboratory Measurement of Sound Insulation of Acoustic Building Components - Part 4: Laboratory 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.

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