DNS/ISO 21388: 2020

ACOUTICS — HEARING AID FITTING MANAGEMENT (HAFM) (ISO 21388: 2020, IDT)


Status: Public comments
Start date: 20240718
End date: 20240918

This document applies to hearing aid fitting management (HAFM) services offered by hearing aid  professionals (HAP) when providing benefit for their clients. The provision of hearing aids relies on  the knowledge and practices of a hearing aid professional, to ensure the proper fitting and adequate  service in the interest of the client with hearing loss. 

This document specifies general processes of HAFM from the client profile to the follow-up through  administering, organising and controlling hearing aid fitting through all stages. It also specifies  important preconditions such as education, facilities and systems that are required to ensure proper  services. 

The focus of this document is the services offered to the majority of adult clients with hearing  impairment. It is recognized that certain populations with hearing loss such as children, persons with  other disabilities or persons with implantable devices can require services outside the scope of this  document. This document generally applies to air conduction hearing aids and for the most part also to  bone conduction devices. 

Hearing loss can be a consequence of serious medical conditions. Hearing aid professionals are not in  a position to diagnose or treat such conditions. When assisting clients seeking hearing rehabilitation  without prior medical examination, hearing aid professionals are expected to be observant of symptoms  of such conditions and refer to proper medical care. 

Further to the main body of the document, which specifies the HAFM requirements and processes,  several informative annexes are provided. Appropriate education of hearing aid professionals is vital  for exercising HAFM. Annex A defines the competencies required for the HAFM processes. Annex B offers a recommended curriculum for the education of hearing aid professionals. Annex C is an example  of an appropriate fitting room. Annex D gives guidance on the referral of clients for medical or other  specialist examination and treatment. Annex E is a recommendation for important information to be  exchanged with the client during the process of HAFM. Annex F is a comprehensive terminology list  offering definitions of the most current terms related to HAFM. 

It is the intention that these annexes be helpful to those who wish to deliver HAFM of the highest quality. 


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