Electroacoustics - General specification for hearing aids
1 Scope
This standard specifies the technical requirements, measurement methods, inspection rules, marking, packaging, transportation and storage of hearing aids.
This standard is applicable to air-conduct and bone conduct hearing aids.
2 Normative references
The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document applies.
GB/T 2421.1 Environmental testing for electric and electronic products - General and guidance (GB/T 2421.1-2008, IEC 60068-1: 1988, IDT)
GB/T 2422 Environmental testing for electric and electronic products - Terms and definitions
GB/T 2423.1 Environmental testing for electric and electronic and electronic products - Part 2: Test methods - Tests A: Cold (GB/T 2423.1-2008, IEC 60068-2-1: 2007, IDT)
GB/T 2424 Environmental testing for electric and electronic products - Guidance for high temperature and low temperature tests
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection (GB/T 2828.1-2003, ISO 2859-1: 1999, IDT)
GB/T 2829 Sampling procedures and tables for periodic inspection by attributes (apply to inspection of process stability)
GB/T 6661 Nipples for insert earphones
GB/T 25102.100-2010 Electroacoustics - Hearing aids - Part 0: Measurement of electroacoustical characteristics
GB/T 25102.1-2010 Electroacoustics - Hearing aids - Part 1: Hearing aids with induction pick-up coil input
GB/T 25102.13-2010 Electroacoustics - Hearing aids - Part 13: Electromagnetic compatibility (EMC) (IEC 60118-13: 2004, IDT)
SJ/Z 9143.2 Hearing aids - Part 9: Methods of measurement of characteristics of hearing aids with bone vibrator output
SJ/T 10659 Occluded-ear simulator for the measurement of earphones coupled to the ear by ear inserts
IEC 60318-5 Electroacoustics - Simulators of human head and ear - Part 5: 2cm3 coupler for the measurement of hearing aids and earphones coupled to the ear by means
of ear inserts
3 Terms and definitions
For the purposes of this standard, the terms and definitions given in GB/T 25102.100, GB/T 25102.1 and GB/T 2422 as well as the following apply.
3.1
hearing aid
electronic device used to amplify sound and compensate for hearing loss, usually consisting of microphone, amplifier, and earphone, and powered by a low-voltage battery
3.2
air-conduct hearing aid
hearing aid in which sound amplified by air conduction is transmitted to the inner ear through air in the ear canal
3.3
bone conduct hearing aid
hearing aid that transmits amplified sound to the inner ear by mechanical vibration of mastoid or skull
3.4
box hearing aid
body-worn hearing aid
hearing aid worn on the body (other than the head) of the listener
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Technical requirements
4.1 Appearance and structure requirements
4.2 Requirements for technical parameters of electroacoustic performance
4.3 Requirements for technical parameters of electroacoustic performance after environmental test
4.4 Environmental adaptability
4.5 Electromagnetic compatibility
5 Measurement method
5.1 Measurement conditions
5.2 Appearance and structure requirements
5.3 Measurement method for electroacoustic performance
5.4 Environmental test
5.5 Electromagnetic compatibility
6 Inspection rules
6.1 Acceptance inspection
6.2 Periodic inspection
7 Marking, packaging, transportation and storage
7.1 Marking
7.2 Packaging
7.3 Transportation and storage
