GB/T 25102.4-2010
Electroacoustics.Hearing aids.Part 4:Induction loop systems for hearing aid purposes.Magnetic field strength (English Version)

Standard No.

GB/T 25102.4-2010

Language

Chinese, Available in English version

Release Date

2010

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 25102.4-2010

Replace

GB/T 11454-1989

Scope

This standard specifies requirements for the magnetic field strength of audio induction loop systems used in hearing aids to ensure that they provide an adequate signal-to-noise ratio without overloading the hearing aid. This standard also specifies the minimum frequency response range required for acceptable intelligibility. This part specifies the method of measuring the magnetic field strength, and gives the relevant information of the applicable test equipment, the information and other important matters that should be provided to the system operator and user. This standard applies to audio frequency induction loop systems that generate audio frequency alternating magnetic fields and provide input signals for hearing aids equipped with induction telecoils. This standard does not specify loop driver amplifiers and associated microphones or audio signal sources, nor does it specify requirements for the strength of magnetic fields generated by devices such as telephone handsets within the scope of ITU-T P.370.

GB/T 25102.4-2010 history

• 2010 GB/T 25102.4-2010 Electroacoustics.Hearing aids.Part 4:Induction loop systems for hearing aid purposes.Magnetic field strength
• 1989 GB/T 11454-1989 Magnetic field strength in audio-frequency induction loops for hearing aid purposes

GB/T 25102.4-2010 Electroacoustics.Hearing aids.Part 4:Induction loop systems for hearing aid purposes.Magnetic field strength has been changed from GB/T 11454-1989 Magnetic field strength in audio-frequency induction loops for hearing aid purposes.

GB/T 25102.4-2010 -All Parts