DCMP Captioning Standards and Guidelines https://www.3playmedia.com/blog/dcmp-closed-captioning-standards
Hearing impairment https://dphhs.mt.gov/schoolhealth/chronichealth/developmentaldisabilities/HearingImpairment
Certified Professional in Accessibility Core Competencies (CPACC) https://www.accessibilityassociation.org/s/certified-professional