AS1428.5-2010 (R2016) requires a hearing augmentation system to be provided where an in-built amplification system such as telecommunications systems, EWIS system, public address system and telephone services are installed in a public building or space designed for 5 or more people. D3.7 further classifies a class 9b building with in-built amplification as requiring hearing augmentation. Typically churches, meeting rooms, classrooms, halls and auditoriums with in-built speakers, TV’s and PA Systems will require hearing augmentation.
Your building surveyor, architect or electrical engineer will be able to confirm if the space falls into this category.