GB/T 14727-1993 General specification for the wireless transmitting hearing-speech training equipment for the deaf children

GB/T 14727-2008 General specification for the wireless hearing system equipment for the deaf children

GB 1982 GB 1983 GB 6660 GB 9001 GB 9388 GB/T 191-2000 Packaging—Pictorial marking for handling of goods GB/T 191-2008 Packaging—Pictorial marking for handling of goods GB/T 2423.1-2001 Environmental testing for electric and electronic products—Part 2:—Test methods Tests A:Cold GB/T 2423.1-2008 Environmental testing for electric and electronic products—Part 2:Test methods—Tests A:Cold GB/T 2423.2-2001 Environmental testing for electric and electronic products—Part 2:Test methods-Tests B:Dry heat GB/T 2423.2-2008 Environmental testing for electric and electronic products—Part 2:Test methods—Tests B:Dry heat GB/T 2423.3-1993 Basic environmental testing procedures for electric and electronic products—Test Ca:Damp heat, steady state GB/T 2423.3-2006 Environmental testing for electric and electronic products—Part 2:Testing method—Test Cab:Damp heat, steady state GB/T 2423.3-2016 Environmental testing—Part 2:Testing method—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 2423.8-1995 Environmental testing for electric and electronic products—Parts 2:Test methods—Test Ed:Free fall GB/T 2423.10-1995 Environmental testing for electric and electronic products—Part 2:Test methods—Test Fc and guidance:Vibration (Sinusoidal) GB/T 2423.10-2008 Environmental testing for electric and electronic products—Part 2:Tests methods Test Fc:Vibration(sinusoidal) GB/T 2423.10-2019 Environmental testing—Part 2:Tests methods—Test Fc:Vibration(sinusoidal) GB/T 6657-1986 Measurement of electroacoustic characteristics of hearing aids GB/T 6658-1986 Measurement of electroacoustical characteristics of hearing aids with induction pick-up coil input GB/T 6659-1986 Measurement of electroacoustical characteristics of hearing aids with automatic gain control circuits GB 8898-2001 Audio, video and similar electronic apparatus—Safety requirements GB 8898-2011 Audio,video and similar electronic apparatus—Safety requirements GB/T 11454-1989 Magnetic field strength in audio-frequency induction loops for hearing aid purposes GB 12641-1990 Safe handling and operation of audiovisual, video and television equipment and systems GB 12641-2007 Safety requirements for handling and operation of audiovisual teaching equipment and systems GB/T 9401-1988 Methods of measurement for microphones GB/T 191-2025 Graphical symbols marking for handling and storage of packages