An H-4 profile is hearing loss sufficient to preclude safe and effective performance of duty, regardless of level of pure tone hearing loss, and despite use of hearing aids.
ɐn ˈeɪtʃ fˈoːɹ pɹˈoʊfaɪl ɪz hˈɪɹɪŋ lˈɔs səfˈɪʃənt tə pɹɪklˈuːd sˈeɪf ænd ɪfˈɛktɪv pɚfˈoːɹməns ʌv dˈuːɾi, ɹᵻɡˈɑːɹdləs ʌv lˈɛvəl ʌv pjˈʊɹ tˈoʊn hˈɪɹɪŋ lˈɔs, ænd dᵻspˈaɪt jˈuːs ʌv hˈɪɹɪŋ ˈeɪdz.