1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21058-8 SANS 1451-2:2008Edition 1.1 Any reference to SABS 1451-2 is deemedto be a reference to this standard(Government Notice No. 1373 of
4、 8 November 2002)SOUTH AFRICAN NATIONAL STANDARD Hearing protectors Part 2: Ear-plugs Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 1451-2:200
5、8 Edition 1.1 Table of changes Change No. Date Scope Amdt 1 2008 Amended to change the designation of SABS standards to SANS standards, and to update referenced standards. Acknowledgement Standards South Africa wishes to acknowledge the valuable assistance derived from publications of the following
6、organizations: British Standards Institution International Organization for Standardization Foreword This South African standard was approved by National Committee StanSA TC 76, Acoustics, electro-acoustics and vibration, in accordance with procedures of Standards South Africa, in compliance with an
7、nex 3 of the WTO/TBT agreement. This document was published in March 2008. This document supersedes SABS 1451-2:1988 (edition 1). A vertical line in the margin shows where the text has been technically modified by amendment No. 1. SANS 1451 consists of the following parts, under the general title He
8、aring protectors: Part 1: Ear-muffs. Part 2: Ear-plugs. Part 3: Ear-muffs attached to an industrial safety helmet. SANS 1451-2:2008 Edition 1.1 1 Contents Page Acknowledgement Foreword 1 Scope . 3 2 Definitions. 3 3 Requirements 4 4 Marking 5 5 Information . 5 6 Inspection and methods of test 5 Appe
9、ndix A Applicable standards 6 Appendix B Quality evaluation of ear-plugs produced to the requirements laid down in this part of the specification . 6 SANS 1451-2:2008 Edition 1.1 2 This page is intentionally left blank SANS 1451-2:2008 Edition 1.1 3 Hearing protectors Part 2: Ear-plugs 1 Scope 1.1 T
10、his part of the specification covers constructional and performance requirements for ear-plugs intended for use as hearing protectors. 1.2 This part of the specification does not cover ear-plugs in which the acoustic performance is claimed to be dependent upon amplitude. 1.3 Real-ear attenuation cha
11、racteristics of the ear-plugs are measured in accordance with the subjective method specified in ISO 4869-1. Amdt 1 NOTE a) Ear-muffs are covered in SANS 1451-1. b) The standards referred to in this part of the specification are listed in appendix A. c) Guidance on the verification of the quality of
12、 ear-plugs produced to this part of the specification is given in appendix B. 2 Definitions 2.1 For the purposes of this part of the specification the definitions given in SANS 1451-1 and the following definition shall apply: ear-plug a hearing protector inserted and worn in the ear canal or in the
13、ear cavity or occluding the entrance to the external ear canal SANS 1451-2:2008 Edition 1.1 4 3 Requirements 3.1 All parts of a pair of ear-plugs shall be so designed and manufactured that they are not likely to cause injury to the wearer when they are fitted and used in accordance with the manufact
14、urers instructions. 3.2 Materials used in parts of ear-plugs which may come into contact with the skin shall be non-staining and not known to cause skin irritation or to have any adverse effect on health. 3.3 Ear-plugs that have been inserted in accordance with the manufacturers instructions shall b
15、e capable of being readily and completely removed from the ear canal by the wearer without the use of a tool. 3.4 Any part of the ear-plug that protrudes outside the ear canal when the ear-plug is fitted in accordance with the manufacturers instructions shall be of such a construction that it is unl
16、ikely to lead to any internal injury if it is disturbed externally. 3.5 Ear-plugs intended for repeated use shall: a) be supplied in a package in which they can be hygienically stored when not in use; and b) not be impaired or damaged after being cleaned in accordance with the manufacturers instruct
17、ions. (Such instructions shall not require the use of cleaning agents that are known to be harmful to the health of the wearer.) 3.6 When an ear-plug is tested in accordance with 6.2, the attenuation determined shall be at least equal to the values given in table 1. Table 1 Minimum attenuation value
18、s 1 2Band centre frequency Hz Attenuation, minimum dB 125 18 250 16 500 19 1 000 23 2 000 26 4 000 30 8 000 30 NOTE Ear-plugs used for protection against high energy impulsive noise, e.g. certain military applications, will require higher attenuation values to be effective. SANS 1451-2:2008 Edition
19、1.1 5 4 Marking 4.1 Ear-plugs or their immediate packaging or dispensers shall be legibly and indelibly marked with the following information: a) the manufacturers name, trade mark or other identifying mark; b) where appropriate, the size of the ear-plugs and the range of sizes offered by the manufa
20、cturer; c) instructions for the correct selection, fitting and use of the ear-plugs, with emphasis on the need for proper fitting; d) where ear-plugs are intended for repeated use, the method of cleaning recommended by the manufacturer; e) the address of the manufacturer, importer or distributor. 5
21、Information The following background information shall be made available by the manufacturer on request: a) where applicable, details of the size range of ear-plugs offered by the manufacturer; b) attenuation results (only for the size of ear-plugs being offered by the manufacturer) measured and pre
22、sented using the procedures given in ISO 4869-1. Amdt 1 6 Inspection and methods of test 6.1 Inspection Visually examine the ear-plugs in the sample for compliance with 3.1-3.5 (inclusive) and section 4. 6.2 Test for attenuation Use the method given in ISO 4869-1 to determine the attenuation at the
23、test frequencies given in table 1 and check for compliance with 3.6. Amdt 1 SANS 1451-2:2008 Edition 1.1 6 Appendix A Applicable standards Reference is made to the latest issues of the following standards: ISO 4869-1, Acoustics Hearing protectors Part 1: Subjective method for the measurement of soun
24、d attenuation. Amdt 1 SANS 1451-1, Hearing protectors Part 1: Ear-muffs. SANS 9001/ISO 9001, Quality management systems Requirements. Amdt 1 Appendix B Quality evaluation of ear-plugs produced to the requirements laid down in this part of the specification B.1 Quality verification B.1.1 When a purch
25、aser requires quality verification on an ongoing basis of ear-plugs produced to this part of the specification, it is suggested that, rather than to evaluation of the final product only, he also direct his attention to the quality management system applied by the manufacturer. In this connection it should be noted that SANS 9001 covers the provision of an integrated quality management system. Amdt 1 Standards South Africa
