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2. Better Hearing Institute. (2023). Hearing aid marketing and advertising: A consumer's guide to avoiding misleading claims. Better Hearing Institute. https://www.betterhearing.org/hearing-aids/buying-a-hearing-aid/hearing-aid-marketing-advertising/
3. Consumers Association of Canada. (2021). Consumer perceptions of hearing healthcare professionals in Canada.
4. European Union of Hard of Hearing People. (2017). The consumer experience of hearing aids in Europe: A report on the results of the Hear-It AISHA project. Hear-It AISHA. https://www.hear-it.org/~/media/downloads/AISHA-report-final-2017-03-23.ashx
5. Grand View Research. (2022). Hearing aids market size, share & trends analysis report by product (behind-the-ear, in-the-ear), by technology type (digital, analog), by distribution channel, by region, and segment forecasts, 2022-2030. Grand View Research. https://www.grandviewresearch.com/industry-analysis/hearing-aids-market