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GB 23466-2025: Selection, use and maintenance of hearing protective equipment
Status: Valid GB 23466: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB 23466-2025 | English | 519 |
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Selection, use and maintenance of hearing protective equipment
| Valid |
GB 23466-2025
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| GB/T 23466-2009 | English | 329 |
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Guideline for selection of hearing protectors
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GB/T 23466-2009
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Basic data | Standard ID | GB 23466-2025 (GB23466-2025) | | Description (Translated English) | Selection, use and maintenance of hearing protective equipment | | Sector / Industry | National Standard | | Classification of Chinese Standard | C73 | | Classification of International Standard | 13.340.20 | | Word Count Estimation | 26,295 | | Date of Issue | 2025-08-29 | | Date of Implementation | 2026-09-01 | | Older Standard (superseded by this standard) | GB/T 23466-2009 | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | GB 23466-2025: Selection, use and maintenance of hearing protective equipment---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB23466-2025
ICS 13.340.20
CCSC73
National Standard of the People's Republic of China
Replaces GB/T 23466-2009
Selection, use and maintenance of hearing protection equipment
Released on August 29, 2025
Implementation on September 1, 2026
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Symbols 2
5 Types of hearing protection equipment 3
6.Selection of hearing protection equipment 3
7 Usage training, precautions and feedback 5
8 Care and maintenance 6
Appendix A (Informative) Typical noise types and protection 7
Appendix B (Informative) Example of selecting hearing protection equipment 9
Appendix C (Informative) Test Method for the Suitability of Hearing Protective Equipment 13
Appendix D (Informative) Effect of wearing time on protection effect 15
Appendix E (Informative) Training Requirements for the Use of Hearing Protection Equipment 16
Reference 18
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces GB/T 23466-2009 "Guide to the selection of hearing protectors". Compared with GB/T 23466-2009, except for the structural adjustment and
In addition to editorial changes, the main technical changes are as follows.
a) The terms and definitions of “earmuffs”, “earplugs” and “protection rate” have been changed (see 3.2, 3.3, 3.7 and 3.2, 3.3 and 3.6 of the.2009 edition);
b) Added the terms and definitions of “8-hour equivalent sound level” and “40-hour equivalent sound level per week” (see 3.10 and 3.11);
c) Added symbols (see Chapter 4);
d) Deleted the general requirements for the combined use of earplugs and earmuffs (see 4.2.6 of the.2009 edition);
e) Added types of hearing protection equipment (see Chapter 5);
f) The general principles for the selection of hearing protection equipment have been modified (see 6.1, 4.1 of the.2009 edition);
g) Changed the selection requirements for hearing protection equipment, adding hearing protection equipment with basic functions and hearing protection equipment with electroacoustic and communication functions.
Requirements for selection of protective equipment (see 6.2.1, 6.2.2, 4.2 of the.2009 edition);
h) Changed the requirements for investigating workplace environment information (see 6.3.1.1, 4.3.1 of the.2009 edition);
i) The requirements for measuring octave band sound pressure levels have been changed (see 6.3.1.1, 4.3.1.2 of the.2009 edition);
j) The requirements for information on survey personnel have been changed (see 6.3.1.2, 4.3.2 of the.2009 edition);
k) Changed the requirements for determining the effective A-weighted sound pressure level and the screening of the sound attenuation value of hearing protection equipment (see 6.3.3.1, 6.3.3.2,
2009 edition, 4.5.1 and 4.5.2);
l) Changed the requirements for the selection of hearing protection equipment (see 6.3.3.3, 4.5.3 of the.2009 edition);
m) Added requirements for the impact of over-protection (see 6.3.3.4);
n) Added requirements for user training, precautions and feedback (see Chapter 7);
o) Added care and maintenance requirements (see Chapter 8).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document is proposed and coordinated by the Ministry of Emergency Management of the People's Republic of China.
The previous versions of this document and the documents it replaces are as follows.
---First published in.2009 as GB/T 23466-2009;
---This is the first revision.
Selection, use and maintenance of hearing protection equipment
1 Scope
This document specifies the selection method and use and maintenance requirements of hearing protection equipment.
This document applies to the selection, use and maintenance of hearing protection equipment for use in workplaces exposed to occupational noise.
This document is not applicable to protection against impulse noise.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 12903 Terminology of Personal Protective Equipment
GBZ /T 189.8-2007 Measurement of physical factors in the workplace Part 8.Noise
3 Terms and Definitions
The terms and definitions defined in GB/T 12903 and the following apply to this document.
3.1
hearing protector
Personal protective equipment that protects hearing and prevents people from excessive noise stimulation.
[Source. GB 31422.1-2025, 3.1]
3.2
earmuffs
Hearing protection consists of a cup that presses against the auricle or surrounds the auricle and fits tightly against the head.
[Source. GB 31422.2-2025, 3.3]
3.3
earplugs
Hearing protection equipment that is inserted into the external auditory canal or blocks the entrance to the external auditory canal.
[Source. GB 31422.1-2025, 3.3]
3.4
sound attenuation
For a given test signal, the difference in hearing threshold between the test subject without hearing protection and with hearing protection.
Note. Sound attenuation is expressed in decibels (dB).
3.5
Over-protection
The hearing protection equipment worn has too high sound attenuation performance, making it difficult for the wearer to receive the necessary sound signals, resulting in
An uncomfortable feeling of being isolated from your surroundings.
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