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GB/T 7584.3-2011: Acoustics -- Hearing protectors -- Part 3: Measurement of insertion loss of ear-muff type protectors using an acoustic test fixture
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Acoustics -- Hearing protectors -- Part 3: Measurement of insertion loss of ear-muff type protectors using an acoustic test fixture
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GB/T 7584.3-2011
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Basic data | Standard ID | GB/T 7584.3-2011 (GB/T7584.3-2011) | | Description (Translated English) | Acoustics -- Hearing protectors -- Part 3: Measurement of insertion loss of ear-muff type protectors using an acoustic test fixture | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | C73 | | Classification of International Standard | 13.340.20 | | Word Count Estimation | 15,129 | | Date of Issue | 2011-12-30 | | Date of Implementation | 2012-05-01 | | Quoted Standard | GB/T 3241; GB/T 3769; GB/T 6031-1998; GB/T 7584.1; GB/T 7584.2; GB/T 20441.4-2006; JJF 1059-1999 | | Adopted Standard | ISO 4869-3-2007, IDT | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 22 of 2011 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the use of special acoustic test equipment measurement -ear hearing protectors insertion losses. The method specified in this section is not identified as a product type testing of the basic testing methods. This method is obtained -ear hearing protectors used to characterize the performance data is not real-ear sound attenuation earmuffs or ear protection provided by Chui performance. This section applies to product type identification inspection or certification procedures consistency in product performance survey, also applies to product performance and aging investigation. In accordance with GB/T 7584. 1 for sound attenuation of hearing protectors subjective tests, this method can ensure the submitted sample ear style hearing protectors are typical with this type of product performance. For some earmuffs (for example, attached to a safety helmet on the ear, the ear cups with green outline style, with ear pads earmuffs earmuffs or ear pressure) test method described in this section may require correction. | GB/T 7584.3-2011: Acoustics -- Hearing protectors -- Part 3: Measurement of insertion loss of ear-muff type protectors using an acoustic test fixture
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
. Acoustics Hearing protectors Part 3. Measurement of insertion loss of ear-muff type protectors using an acoustic test fixture
ICS 13.340.20
C73
National Standards of People's Republic of China
Hearing protectors - Part 3. Dedicated Acoustic
Insertion loss testing device for measuring the-ear hearing protectors
Acoustics-Hearingprotectors-Part 3. Measurementofinsertionlossof
(ISO 4869-3.2007, IDT)
Issued on. 2011-12-30
2012-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 7584 "Hearing protectors" is divided into six sections.
--- Part 1. subjective method for the measurement of sound attenuation;
--- Part 2. when hearing protectors are worn effective A-weighted sound pressure level estimate;
--- Part 3. Use a dedicated acoustic test apparatus for measuring the insertion loss of ear-muff type hearing protectors;
--- Part 4. Sound pressure associated with sound and effective restoration ear SPL measurements;
--- Part 5. Evaluation of noise attenuation method by inexperienced subjects to wear;
--- Part 6. Methods of measurement hearing protectors active noise attenuation.
This section GB/T 37584 Part of.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This part identical with ISO 4869-3.2007 "Hearing protectors - Part 3. Test using a dedicated device for measuring acoustic earmuffs formula
Hearing protectors insertion loss "(in English). This section is equivalent to using international standards made editorial changes.
This section proposed by the Chinese Academy of Sciences.
The acoustics in part by the National Standardization Technical Committee (SAC/TC17) centralized.
This section drafted by. Institute of Acoustics, Chinese Institute of Electronics Technology Group Corporation, People's Liberation Army General Hospital Archiver
Throat Institute.
The main drafters of this section. Li Xiaodong, Sang Jin Qiu, Wengtai Lai, Chen Hongwen, Wu Wenming.
Introduction
In 1989, a description of how to use a dedicated test device for measuring acoustic earmuff type hearing protectors insertion loss of the technical report as
ISO /T R4869-3 published. With worldwide laboratories dedicated acoustic test widely used means of this technical report is a revised and
As the international standard ISO 34869 Part of. This International Standard Section 3 is adopted as our national standards equivalent to GB/T 7584 of
Part 3.
With the original technical report different is the most important part is the content of this special acoustic test device specifications. Here special sound
Means-test is not intended to replace analog head. Simulation head also includes a simulation of various anatomical features, and can be used to develop testing.
Results GB/T 7584 this part of the method provides results with GB/T 7584.1 in subjective measurement methods vary.
Hearing protectors - Part 3. Dedicated Acoustic
Insertion loss testing device for measuring the-ear hearing protectors
1 Scope
This section provides a dedicated test device for measuring acoustic earmuff type hearing protectors insertion losses.
The method specified in this test method is not as the basic product type identification testing. This method of obtaining the-ear hearing protectors performance data
It is not intended to protect characterization real ear sound attenuation earmuff or earmuffs offer.
This section applies to product type identification of inspection or certification procedures in product performance consistency of investigations, also applies to the performance of aging
survey. When according to GB/T 7584.1 conduct sound attenuation hearing protectors subjective test, this method can guarantee around-ear hearing protectors submitted sample
With a typical performance of this type of product.
For some ear (for example, earmuffs attached safety helmet, with profile-style cup earmuffs, earmuffs or ear pads with ear-ear style
Cover) test method described in this section may need to be amended.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 3241 electro-acoustics octave and fractional octave filters (GB/T 3241-2010, IEC 61260.1995, MOD)
GB/T 3769 electro-acoustics plotting frequency characteristics and polar diagrams of scale and size (GB/T 3769-2010, IEC 60263.
1982, IDT)
GB/T 6031-1998 Determination of vulcanized rubber or thermoplastic rubber hardness (10 ~ 100IRHD) (idt ISO 48.1994)
Subjective method of measurement of sound attenuation (GB/T 7584.1-2004, ISO 4869-. GB/T 7584.1 Hearing protectors - Part 1
1.1990, IDT)
GB/T 7584.2 Hearing protectors - Part 2. when hearing protectors are worn effective A-weighted sound pressure level estimate (GB/T 7584.2-
1999, idt ISO 4869-2.1994)
GB/T 20441.4-2006 Measurement microphones - Part 4. Specifications for working standard microphones (IEC 61094-4.1995, IDT)
JJF1059-1999 Evaluation and Expression of Uncertainty in Measurement
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Hearing protectors hearingprotector
In order to reduce unwanted sound stimulation auditory effects and wear personal equipment.
3.2
Ear ear-muff
The pressure on each ear of the ear cup ear, or by the pressure in the ear and around the ear surrounded silhouette style ear cup consisting of hearing protectors.
Note. The ear cups are available special headband or neck rings worn on the head, or member attached to the safety helmet.
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