1 Scope
This standard specifies the classification, designation, coding of headphones, and the inspection items, technical requirements, test methods, inspection rules and information of headphone products.
This standard is applicable to headphones or headphone-microphone sets used on or in human ears. It is also applicable to essential assembly parts of complete headphones, such as pre-amplifier, passive network and power supply.
This standard is not applicable to wireless headphones or noise cancelling headphones.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB/T 2423.1-2008 Environmental Testing for Electric and Electronic Products - Part 2: Test Methods - Tests A: Cold
GB/T 2423.2-2008 Environmental Testing for Electric and Electronic Products - Part 2: Test Methods - Tests B: Dry Heat
GB/T 2423.3-2006 Environmental Testing for Electric and Electronic Products - Part 2: Testing Methods - Test Cab: Damp Heat Steady State
GB/T 2423.6-1995 Environmental Testing for Electric and Electronic Products - Part 2: Test methods - Test Eb and Guidance: Bump
GB/T 2423.10-2008 Environmental Testing for Electric and Electronic Products - Part 2: Tests Methods - Test Fc: Vibration (Sinusoidal)
GB/T 2828.1-2012 Sampling Procedures for Inspection by Attribute - Part 1: Sampling Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-lot Inspection
GB/T 2829-2002 Sampling Procedures and Tables for Periodic Inspection by Attributes (Applicable to Inspection of Stability for Productive Process)
GB/T 12060.2-2011 Sound System Equipment - Part 2: Explanation of General Terms and Calculation Methods (IEC 60268-2:1987, IDT)
GB/T 12060.7-2013 Sound System Equipment - Part 7: Methods of Measurement on Headphones and Earphones (IEC 60268-7:2010, MOD)
GB/T 12060.11-2012 Sound System Equipment - Part 11: Application of Connectors for the Interconnection of Sound System Equipment (IEC 60268-11:1987, NEQ)
GB/T 13581 Minimum Performance Requirements on High Fidelity Head-phones
GB/T 14197 Preferred Matching Values for the Interconnections of Audio, Video and Audiovisual Systems
3 Classification, Designation and Coding
See GB/T 12060.7-2013.
4 Operating Conditions and Measuring Conditions
4.1 Measuring conditions
4.1.1 Standard atmospheric conditions for test
Unless otherwise specified, the test method for each technical requirement in this standard shall be carried out under the following standard atmospheric conditions:
Ambient temperature: 15~35℃;
Relative humidity: 25~75%;
Air pressure: 86~106kPa.
4.1.2 Arbitration atmosphere conditions
In case of any dispute, the test shall be carried out under the following arbitration atmosphere conditions:
Ambient temperature: 20±1℃;
Foreword I
1 Scope
2 Normative References
3 Classification, Designation and Coding
4 Operating Conditions and Measuring Conditions
5 Technical Requirements
6 Test Methods
7 Inspection Rules
8 Provided Product Information, Packaging, Transportation and Storage
Table 1 Connector Adopted for Connection between Headphones and Complete Machine Output Terminal
Table 2 Universal Matching Value between Headphones and Amplifier
Table 3 Electroacoustic Parameter Test
Table 4 Vibration Test
Table 5 Impact test
Table 6 Drop Test
Table 7 Appraisal Inspection
Table 8 Sampling Inspection Table for Lot-by-lot Inspection
Table 9 Rejected Contents and Classification
Table 10 Periodic Inspection for Headphones
Table 11 Lot-by-lot Inspection Items for Samples before Periodic Inspection
