People who identify as hard of hearing often do have high levels of residual hearing, but may require additional volume or clarity, or other adjustments to hear accurately.
Yn aml, mae pobl sy'n adnabod eu hunain fel rhai trwm eu clyw lefelau uchel o glyw gweddilliol, ond efallai y bydd angen sain uwch neu eglurder ychwanegol, neu addasiadau eraill i glywed yn iawn.