ITU-T H.871 PDF

This Recommendation describes safety requirements for personal sound amplifiers (PSAs), including both personal sound amplification products (PSAPs) and personal sound amplification apps (PSAAs) types, to protect people from further hearing loss.

Currently there is no international standard for PSAs; a standard is needed to ensure that these devices, which are freely available to anyone, are safe for users and do not further damage users' hearing.

[ITU-T H.870] provides safe listening standards but excludes PSAs. Therefore, this Recommendation follows the logic and concept of [ITU-T H.870] but is specifically intended for PSAs.

This Recommendation provides characteristics of PSAs and suggests ways of informing consumers about the potential unacceptable noise levels when using these devices for prolonged periods of time.