The reason I have added this job vacancy is that this is one (rather rare) example of the job title 'Hearing Aid Acoustician' in South Africa.
To compare to the job title Hörgeräteakustiker in Germany. 

Audiologist/Hearing Aid Acoustician Vacancy

Healthy Hearing, Pretoria, Gauteng

We wish to appoint an Audiologist/Hearing Aid Acoustician in the Pretoria area to manage one of our established practices, as well as conduct audiological testing and examinations. The successful candidate will be fluent in Afrikaans and English, be of pleasant disposition and have the ability to deal with and show empathy to the elderly. Must have own reliable transport. - 5+ years experience highly advantageous. 

Source: ZA.Indeed.com (temporary link)