- hard of hearing (or HoH)
- hearing impaired (trust me on this - do NOT use that term with anyone)
Those terms do not come with a "one size fits all" tag. I prefer to be called "deaf". I am deaf enough that you cannot lump me with others who have slight hearing loss because that infers I can hear something. I have deaf friends, HoH friends, and hearing friends.
By rule, we do not feel offended if you ask us how we prefer to be labeled as. By asking us rather than labeling us, we get to assert our own sense of identity within the hearing world and we feel that you have shown respect to us.
As for the "hearing impaired" term, we would prefer that you never use that - it is offensive to us. However, this warrants another post because it is too long...and deserves its own post. I promise to discuss that issue in the near future.