Expression: 'hard of hearing'

[elvirca]

English Idioms and Expressions, Intermediate level

ESL/EFL Test #20 "English Idioms and Phrases", question 1

You have to raise your voice a little when talking to him. He's a little hard of hearing.

(a) stubborn
(b) quiet when he speaks
(c) deaf
(d) distracted

English Idioms and Expressions, Intermediate level

ESL/EFL Test #20 "English Idioms and Phrases", answer 1

You have to raise your voice a little when talking to him. He's a little deaf.

Correct answer: (c) deaf
_________________________

what's the meaning of the sentence?

elvirca

[Conchita]

The sentence means that, since he has difficulty in hearing, you have to speak more loudly when talking to him.

[Thy]

Dear Torsten,
I just did another test and I made a mistake .My sentence is "He's hard of listening" but the correct answer is "He's hard of hearing". Why can't we use the word listening instead of hearing. Can you explain? Thanks