Developing an Appropriate Digital Hearing Aid for Low-Resource Countries: A Case Study

Table 4

Inclusion criteria.

Criteria
(i) More than 18 years old
(ii) Able to read and understand the questionnaire, the manual, and the record form
(iii) Has pure tone average air-conduction threshold at 500, 1000, and 2000 kHz between 40–90 dB in the better ear
(iv) Suitable for hearing rehabilitation by using a hearing aid
(v) Has never used a hearing aid or not satisfied with the current one
(vi) Understand how to operate the hearing aid after training
(vii) Can be back for followups after 1, 3, 6, and 12 months