literally so loud that even the deaf can hear; describes words or writing that have a powerful impact and serve to wake up those who are ignorant or indifferent

dim-sighted and hard of hearing (often due to old age)

literally so loud that even the deaf can hear; used to describe a powerful message or writing that awakens people from ignorance or apathy

(literary) deaf; unable to hear

blind and deaf; (literally) having eyes but not being able to see and being born deaf