Answers are grounded in this paper and cite their sources.
Data on hearing aid sales can be used to estimate hearing aid coverage regionally, and world-wide. Globally, there is a huge unmet need for hearing instruments since less than 11% of people with a disabling hearing loss are hearing aid users.
No takes yet. Share an insight, caveat, or question.
Bisgaard et al. (2021) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: