Probably vanity? https://www.notechmagazine.com/2017/08/non-electric-hearing-aids-outperform-modern-devices.html https://www.notechmagazine.com/2017/08/non-ele

Probably vanity? https://www.notechmagazine.com/2017/08/non-electric-hearing-aids-outperform-modern-devices.html https://www.notechmagazine.com/2017/08/non-electric-hearing-...