That's 656,400 people you are talking about not bothering to accommodate.
According to the National Institute on Deafness and Other Communication Disorders (see https://www.nidcd.nih.gov/health/statistics/quick-statistics...)...
Among adults aged 20-69, the overall annual prevalence of hearing loss dropped slightly from 16 percent (28.0 million) in the 1999-2004 period to 14 percent (27.7 million) in the 2011–2012 period.