This part of GB/T 12060 specifies the measurement methods for headphones and headphones. This section applies to headphones, headphone microphone group (headphone transmitter group) headphones, and headphone microphone group (headphone transmitter group) used on and in the human ear. This section also applies to the necessary components that make up a complete headphone system, such as preamplifiers, passive networks, and power supplies. This section does not involve: - safety, it should refer to GB8898-2011 or other appropriate standards; -- The characteristics of the microphone in the headphone microphone group should refer to GB/T 12060.4-- Earphones and other equipment used for hearing aids should refer to GB/T 2510.2100-- Headphones for audiometry—— Earphones and their combinations with active ear protection systems (although some clauses may apply). The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 156 Standard voltage (GB/T 156-2007, IEC 60038; 2002, MOD) GB/T 531.1 Vulcanized or thermoplastic rubber, indentation hardness test method: Part 1: Shore hardness tester method (Shore hardness) (GB/T 531.12008.1SO 7619-1:2004. IDT) GB/T 2421.1 Environmental testing, overview and guidance for electrical and electronic products (GB/T 2421.1-2008, EC 60068-11988, IDT) GB/T 2900.86-2009 Electrotechnical terminology, acoustics and electroacoustics (IEC 60050-801:1994, IDT) GB/T 3769 Electroacoustics, Scaling and Dimensions for Drawing Frequency Characteristic Maps and Polar Charts (GB/T 3769-2010, IEC 60263:1982, 1DT) GB/T 3785,1 Electroacoustics - Sound Level Meters - Part 1: Specifications (GB/T 3785.1-2010, IEC 61672-1:2002, IDT) GB/T 6278 Overview of Sound System Equipment - Simulated Program Signals GB/T 6881.1 Acoustics - Determination of Sound Power Levels of Noise Sources - Precision Method for Reverberation Rooms (GB/T 6881.1-2002, ISO 3741:1999,1DT) GB/T 7584, Acoustics - Hearing protectors - Part 1: Subjective method for measuring sound attenuation (GB/T 7584,11-2004, ISO 4869-1:1990, IDT)
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